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Auteur : Grafiati
Publié le 7 septembre 2023

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1

KILIAN, WOLFGANG. « STRONGLY INTERACTING W BOSONS AT e-e- COLLIDERS ». International Journal of Modern Physics A 15, no 16 (30 juin 2000) : 2387–96. http://dx.doi.org/10.1142/s0217751x00002457.

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If no Higgs boson exists, scattering amplitudes of massive vector bosons become strong at TeV energies. Below the threshold where new resonances appear, they are described by an effective chiral Lagrangian, which introduces a small number of new universal parameters at each order of a low-energy expansion. These parameters can be measured in (quasi-)elastic scattering processes of massive vector bosons in e-e± collisions. Analyzing processes such as e-e-→νeνeW-W-, a sensitivity of the order 10-2 can be reached at a high-luminosity 1 TeV linear collider.
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2

BAHNÍK, TOMÁS, et JIŘÍ HOŘEJSÍ. « DEVIATIONS FROM LOW-ENERGY THEOREM FOR VLVL SCATTERING DUE TO PSEUDO-GOLDSTONE BOSONS ». Modern Physics Letters A 13, no 38 (14 décembre 1998) : 3045–61. http://dx.doi.org/10.1142/s0217732398003247.

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Possible deviations from a low-energy theorem for the scattering of strongly interacting longitudinally polarized W and Z bosons are discussed within a particular scheme of electroweak symmetry breaking. The scheme (suggested earlier by other authors in a slightly different context) is based on spontaneous breakdown of an SU(4) symmetry to custodial SU(2) subgroup. The physical spectrum of such a model contains a set of relatively light pseudo-Goldstone bosons whose interactions with vector bosons modify the low-energy theorem proven for a "minimal" symmetry-breaking sector The Goldstone-boson manifold SU(4)/SU(2) is not a symmetric space. In this context it is observed that, on the other hand, there is a large class of models of electroweak symmetry breaking, involving groups G and H such that the G/H is a symmetric space and the corresponding rich multiplets of pseudo-Goldstone bosons do not influence the canonical low-energy theorem. For the scheme considered here, the relevant interactions are described in terms of an effective chiral Lagrangian and tree-level contributions of the pseudo-Goldstone boson exchanges to the vector boson scattering are computed explicitly. A comparison with the standard model is made.
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3

HOH, F. C. « GAUGE INVARIANCE AND QUANTIZATION OF THE SPINOR STRONG INTERACTION MODEL ». International Journal of Modern Physics A 09, no 03 (30 janvier 1994) : 365–81. http://dx.doi.org/10.1142/s0217751x94000170.

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The spinor strong interaction model recently proposed to account for the meson spectra is extended to include interaction with external gauge fields. An action integral is constructed and a restricted variational principle is employed to reproduce the earlier basic meson equations. In establishing U(1) gauge invariance, the so-called U(1) problem, the absence of pseudoscalar singlet mesons that do not decay strongly, is naturally resolved. SU(2)× U(1) or SO(3) gauge invariance leads to that pseudoscalar isodoublet or isotriplet mesons can generate masses of the gauge bosons without recourse to the unobserved Higgs bosons of the standard electroweak model. The gauge boson masses relate to the linear confinement potential constant of pseudoscalar mesons. The spinor strong interaction model is quantized in a macroscopic approximation due to the finite size of mesons. Commutation relations and the rest frame Hamiltonian are obtained. In this frame, the relative energy of the quark and antiquark is shown to vanish.
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4

Hasenfratz, A., R. C. Brower, C. Rebbi, E. Weinberg et O. Witzel. « Strongly coupled gauge theories : What can lattice calculations teach us ? » International Journal of Modern Physics A 32, no 35 (20 décembre 2017) : 1747003. http://dx.doi.org/10.1142/s0217751x17470030.

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The dynamical origin of electroweak symmetry breaking is an open question with many possible theoretical explanations. Strongly coupled systems predicting the Higgs boson as a bound state of a new gauge-fermion interaction form one class of candidate models. Due to increased statistics, LHC run II will further constrain the phenomenologically viable models in the near future. In the meanwhile it is important to understand the general properties and specific features of the different competing models. In this work we discuss many-flavor gauge-fermion systems that contain both massless (light) and massive fermions. The former provide Goldstone bosons and trigger electroweak symmetry breaking, while the latter indirectly influence the infrared dynamics. Numerical results reveal that such systems can exhibit a light [Formula: see text] isosinglet scalar, well separated from the rest of the spectrum. Further, when we set the scale via the vev of electroweak symmetry breaking, we predict a 2 TeV vector resonance which could be a generic feature of SU(3) gauge theories.
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5

Alon, O. E., et L. S. Cederbaum. « Fragmentation of a trapped bosonic mixture ». Journal of Physics : Conference Series 2494, no 1 (1 mai 2023) : 012014. http://dx.doi.org/10.1088/1742-6596/2494/1/012014.

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Abstract Fragmentation of bosons and pairs in a trapped imbalanced bosonic mixture is investigated analytically using an exactly solvable model, the generic harmonic-interaction model for mixtures. Closed-form expressions for the eigenvalues and eigenfunctions of the reduced one-particle and two-particle density matrices as a function of all parameters, the masses, numbers of bosons, and the intraspecies and interspecies interactions, are obtained and analyzed. As an application, we consider a system made of N 1 = 100 non-interacting species 1 bosons embedded in a bath made of N 2 = 106 non-interacting species 2 bosons, and show how fragmentation of the system’s bosons and pairs emerges from the system–bath interaction only. Interestingly, the lighter the bosons comprising the bath are the stronger is the system’s fragmentation. Further applications are briefly discussed.
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6

Michal, Vincent P., Igor L. Aleiner, Boris L. Altshuler et Georgy V. Shlyapnikov. « Finite-temperature fluid–insulator transition of strongly interacting 1D disordered bosons ». Proceedings of the National Academy of Sciences 113, no 31 (19 juillet 2016) : E4455—E4459. http://dx.doi.org/10.1073/pnas.1606908113.

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We consider the many-body localization–delocalization transition for strongly interacting one-dimensional disordered bosons and construct the full picture of finite temperature behavior of this system. This picture shows two insulator–fluid transitions at any finite temperature when varying the interaction strength. At weak interactions, an increase in the interaction strength leads to insulator → fluid transition, and, for large interactions, there is a reentrance to the insulator regime. It is feasible to experimentally verify these predictions by tuning the interaction strength with the use of Feshbach or confinement-induced resonances, for example, in 7Li or 39K.
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7

Clark, T. E., et W. T. A. ter Veldhuis. « Strongly interacting longitudinal gauge bosons in supersymmetric models ». Nuclear Physics B 426, no 2 (septembre 1994) : 385–414. http://dx.doi.org/10.1016/0550-3213(94)90317-4.

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8

Kavoulakis, G. M., Y. Yu, M. Ögren et S. M. Reimann. « Superfluidity in a gas of strongly interacting bosons ». Europhysics Letters (EPL) 76, no 2 (octobre 2006) : 215–21. http://dx.doi.org/10.1209/epl/i2006-10264-8.

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9

VELDHUIS, W. T. A. TER. « THE NEUTRALINO SECTOR IN STRONGLY INTERACTING SUPERSYMMETRIC MODELS ». Modern Physics Letters A 09, no 39 (21 décembre 1994) : 3691–701. http://dx.doi.org/10.1142/s0217732394003531.

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The neutralino sector is analyzed for a supersymmetric nonlinear sigma model. This model describes the low energy physics of strongly interacting theories in which super-symmetry is softly broken at scales below the electroweak symmetry breaking scale. The measured width of the Z boson constrains the allowed range of parameters. In case the lightest neutralino is stable, limits on additional contributions to the invisible width of the Z boson and on the relic neutralino density further restrict parameter space. As a consequence, the lightest neutralino in the considered class of theories is required to have a mass above 15 GeV, but below MZ.
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10

Boos, E., H. J. He, W. Kilian, A. Pukhov, C. P. Yuan et P. M. Zerwas. « Strongly interacting vector bosons at TeVe±e−linear colliders ». Physical Review D 57, no 3 (1 février 1998) : 1553–72. http://dx.doi.org/10.1103/physrevd.57.1553.

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11

Patucha, K., B. Grygiel et T. Zaleski. « Hall Conductivity of Strongly Interacting Bosons in Optical Lattice ». Acta Physica Polonica A 135, no 1 (janvier 2019) : 74–77. http://dx.doi.org/10.12693/aphyspola.135.74.

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12

Söyler, Ş. G., B. Capogrosso-Sansone, N. V. Prokof'ev et B. V. Svistunov. « Sign-alternating interaction mediated by strongly correlated lattice bosons ». New Journal of Physics 11, no 7 (17 juillet 2009) : 073036. http://dx.doi.org/10.1088/1367-2630/11/7/073036.

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13

Siringo, F. « Light Higgs bosons from a strongly interacting Higgs sector ». Europhysics Letters (EPL) 59, no 6 (septembre 2002) : 820–26. http://dx.doi.org/10.1209/epl/i2002-00116-1.

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14

CASALBUONI, R., S. DE CURTIS, D. DOMINICI, F. FERUGLIO et R. GATTO. « VECTOR AND AXIAL-VECTOR BOUND STATES FROM A STRONGLY INTERACTING ELECTROWEAK SECTOR ». International Journal of Modern Physics A 04, no 05 (mars 1989) : 1065–110. http://dx.doi.org/10.1142/s0217751x89000492.

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The possibility that both vector and axial-vector bound states could originate from a strong interacting sector of the electroweak theory is considered. A simple Lagrangian parametrization is presented where the bound states are described as gauge vector bosons of a local, nonlinearly realized, SU (2) ⊗ SU (2) symmetry. At present the model is mostly constrained from data on W and Z masses and on neutrino-nucleon deep inelastic scattering. High energy e+e− tests are suggested where visible deviations from the standard model predictions could take place. These deviations exhibit a certain pattern which allows to distinguish the model from other theoretical frameworks. We find that precise measurements of W and Z masses and asymmetries in e+e− collisions could put strong restrictions on the parameters of the model if no appreciable deviations are found from the standard model, except for a case with the vector and axial-vector bosons degenerate in mass and coupling. General differences with respect to technicolor are pointed out.
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15

Nevzorov, Roman, et Anthony Thomas. « Generation of baryon asymmetry in the E6CHM ». EPJ Web of Conferences 191 (2018) : 02004. http://dx.doi.org/10.1051/epjconf/201819102004.

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The strongly interacting sector in the E6 inspired composite Higgs model (E6CHM) with baryon number violation possesses an SU(6) × U(1)L global symmetry. In the weakly-coupled sector of this model the U(1)L symmetry associated with lepton number conservation is broken down to a ZL2 discrete symmetry, which stabilizes the proton. Near the scale f ≳ 10 TeV the SU(6) symmetry is broken down to its SU(5) subgroup, giving rise to a set of pseudo- Nambu-Goldstone bosons (pNGBs) that involves the SM-like Higgs doublet, a scalar coloured triplet and a SM singlet boson. Because f is so high, all baryon number violating operators are sufficiently strongly suppressed. Nevertheless, in this variant of the E6CHM the observed matter-antimatter asymmetry can be induced if CP is violated. The pNGB scalar coloured triplet plays a key role in this process and leads to a distinct signature that may be detected at the LHC in the near future.
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16

Hu, Fang-Qi, et Ju-Kui Xue. « Breathing dynamics of a trapped impurity in a dipolar Bose gas ». Modern Physics Letters B 28, no 22 (30 août 2014) : 1450185. http://dx.doi.org/10.1142/s0217984914501851.

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With the consideration of impurity-bosons coupling and dipole–dipole interactions (DDI), we study the breathing dynamics of a harmonically trapped impurity interacting with a separately trapped background of dipolar Bose gas. By using the variational approach, the breathing equations, the breathing frequencies and the effective potentials governing the breathing dynamics of the impurity in dipolar gas are obtained. The effects of DDI, impurity-bosons interaction and external trapping potentials on breathing dynamics of impurity are discussed. We find that, because of the anisotropic and long-range characters of DDI, the effects of DDI, impurity-bosons interaction and external trapping potentials on breathing dynamics of impurity are strongly coupled. DDI has significant modification on dynamics, which depends on the external trapping potentials. For spherically symmetric external trapping, DDI makes the impurity more cigar-shaped along axial direction and the breathing oscillation in radial direction is suppressed by DDI. However, the effect of DDI on the breathing dynamics is weakened for cigar-shaped external trapping. Interestingly, for strong external pancake-shaped trapping, the symmetries of the breathing dynamics with respect to attractive and repulsive impurity-bosons coupling recover. Especially, for some critical value of impurity-bosons coupling, the breathing dynamics undergo a sudden quench.
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17

ROSENFELD, ROGERIO. « RESONANCE PRODUCTION IN A STRONGLY INTERACTING HIGGS SECTOR ». Modern Physics Letters A 04, no 21 (20 octobre 1989) : 1999–2006. http://dx.doi.org/10.1142/s0217732389002252.

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We compute the cross section for the production of resonances in the strongly interacting Higgs sector analogous to the f2 and a1 resonances in QCD via gauge boson fusion processes in pp colliders at [Formula: see text] and 40 TeV. Their contribution to signatures of this scenario is briefly discussed.
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18

Ketterle, W., Y. Shin, A. Schirotzek et C. H. Schunk. « SUPERFLUIDITY IN A GAS OF STRONGLY INTERACTING FERMIONS ». International Journal of Modern Physics B 24, no 20n21 (30 août 2010) : 3950–67. http://dx.doi.org/10.1142/s0217979210056402.

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After an introduction into 100 years of research on superfluidity and the concept of the BCS-BEC crossover, we describe recent experimental studies of a spin-polarized Fermi gas with strong interactions. Tomographically resolving the spatial structure of an inhomogeneous trapped sample, we have mapped out the superfluid phases in the parameter space of temperature, spin polarization, and interaction strength. Phase separation between the superfluid and the normal component occurs at low temperatures, showing spatial discontinuities in the spin polarization. The critical polarization of the normal gas increases with stronger coupling. Beyond a critical interaction strength, all minority atoms pair with majority atoms, and the system can be effectively described as a boson-fermion mixture. Pairing correlations have been studied by RF spectroscopy, determining the fermion pair size and the pairing gap energy in a resonantly interacting superfluid.
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19

Krauth, Werner, Michel Caffarel et Jean-Philippe Bouchaud. « Gutzwiller wave function for a model of strongly interacting bosons ». Physical Review B 45, no 6 (1 février 1992) : 3137–40. http://dx.doi.org/10.1103/physrevb.45.3137.

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20

Zinner, N. T., A. G. Volosniev, D. V. Fedorov, A. S. Jensen et M. Valiente. « Fractional energy states of strongly interacting bosons in one dimension ». EPL (Europhysics Letters) 107, no 6 (1 septembre 2014) : 60003. http://dx.doi.org/10.1209/0295-5075/107/60003.

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21

Zaleski, T. A., et T. K. Kopeć. « Unconventional quantum critical points in systems of strongly interacting bosons ». Physica B : Condensed Matter 449 (septembre 2014) : 204–8. http://dx.doi.org/10.1016/j.physb.2014.05.038.

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22

Austern, Matthew H. « Can a strongly interacting Higgs boson rescue SU(5) ? » Physical Review D 47, no 3 (1 février 1993) : 1268–71. http://dx.doi.org/10.1103/physrevd.47.1268.

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23

Kirson, Michael W. « Bose-Einstein condensation in an exactly solvable model of strongly interacting bosons ». Journal of Physics A : Mathematical and General 33, no 4 (24 janvier 2000) : 731–40. http://dx.doi.org/10.1088/0305-4470/33/4/307.

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24

Haller, Elmar, Russell Hart, Manfred J. Mark, Johann G. Danzl, Lukas Reichsöllner, Mattias Gustavsson, Marcello Dalmonte, Guido Pupillo et Hanns-Christoph Nägerl. « Pinning quantum phase transition for a Luttinger liquid of strongly interacting bosons ». Nature 466, no 7306 (juillet 2010) : 597–600. http://dx.doi.org/10.1038/nature09259.

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25

Minguzzi, A., et P. Vignolo. « Strongly interacting trapped one-dimensional quantum gases : Exact solution ». AVS Quantum Science 4, no 2 (juin 2022) : 027102. http://dx.doi.org/10.1116/5.0077423.

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Understanding the effect of correlations in interacting many-body systems is one of the main challenges in quantum mechanics. While the general problem can only be addressed by approximate methods and numerical simulations, in some limiting cases, it is amenable to exact solutions. This Review collects the predictions coming from a family of exact solutions which allows us to obtain the many-body wavefunction of strongly correlated quantum fluids confined by a tight waveguide and subjected to any form of longitudinal confinement. It directly describes the experiments with trapped ultracold atoms where the strongly correlated regime in one dimension has been achieved. The exact solution applies to bosons, fermions, and mixtures. It allows us to obtain experimental observables such as the density profiles and momentum distribution at all momentum scales, beyond the Luttinger liquid approach. It also predicts the exact quantum dynamics at all the times, including the small oscillation regime yielding the collective modes of the system and the large quench regime where the system parameters are changed considerably. The solution can be extended to describe finite-temperature conditions, spin, and magnetization effects. The Review illustrates the idea of the solution, presents the key theoretical achievements, and the main experiments on strongly correlated one-dimensional quantum gases.
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26

NEUFELD, RICHARD BRYON. « TAGGED JETS AND JET RECONSTRUCTION AS A PROBE OF QGP INDUCED PARTONIC ENERGY LOSS ». International Journal of Modern Physics E 20, no 07 (juillet 2011) : 1605–9. http://dx.doi.org/10.1142/s0218301311019957.

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Recent experimental advances at the Relativistic Heavy Ion Collider (RHIC) and the large center-of-mass energies available to the heavy-ion program at the Large Hadron Collider (LHC) will enable strongly interacting matter at high temperatures and densities, that is, the quark-gluon plasma (QGP), to be probed in unprecedented ways. Among these exciting new probes are fully-reconstructed inclusive jets and the away-side hadron showers associated with a weakly or electromagnetically interacting boson, or, tagged jets. Full jet reconstruction provides an experimental window into the mechanisms of quark and gluon dynamics in the QGP which is not accessible via leading particles and leading particle correlations. Theoretical advances in this growing field can help resolve some of the most controversial points in heavy ion physics today. I here discuss the power of jets to reveal the spectrum of induced radiation, thereby shedding light on the applicability of the commonly used energy loss formalisms and present results on the production and subsequent suppression of high energy jets tagged with Z bosons in relativistic heavy-ion collisions at RHIC and LHC energies using the Gyulassy-Levai-Vitev (GLV) parton energy loss approach.
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27

HAN, TAO, ZHENG HUANG et P. Q. HUNG. « A MODEL OF LOW-LYING STATES IN STRONGLY INTERACTING ELECTROWEAK SYMMETRY-BREAKING SECTOR ». Modern Physics Letters A 11, no 14 (10 mai 1996) : 1131–37. http://dx.doi.org/10.1142/s0217732396001168.

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It is proposed that, in a strongly-interacting electroweak sector, besides the Goldstone bosons, the coexistence of a scalar state (H) and vector resonances such as A1 [IG(JP)= 1–(1+)], V [1+(1–)] and ωH [0–(1–)] is required by the proper Regge behavior of the forward scattering amplitudes. This is a consequence of the following well-motivated assumptions: (a) Adler-Weisberger-type sum rules and the superconvergence relations for scattering amplitudes hold in this strongly interacting sector; (b) the sum rules at t=0 are saturated by a minimal set of low-lying states with appropriate quantum numbers. It therefore suggests that a complete description should include all these resonances. These states may lead to distinctive experimental signatures at future colliders.
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28

Mei, Feng, Gang Chen, N. Goldman, Liantuan Xiao et Suotang Jia. « Topological magnon insulator and quantized pumps from strongly-interacting bosons in optical superlattices ». New Journal of Physics 21, no 9 (11 septembre 2019) : 095002. http://dx.doi.org/10.1088/1367-2630/ab3d93.

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29

Grygiel, B., K. Patucha et T. Zaleski. « Real and Imaginary Part of Conductivity of Strongly Interacting Bosons in Optical Lattices ». Acta Physica Polonica A 135, no 1 (janvier 2019) : 69–73. http://dx.doi.org/10.12693/aphyspola.135.69.

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Kahan, Alan, Thomás Fogarty, Jing Li et Thomas Busch. « Driving Interactions Efficiently in a Composite Few-Body System ». Universe 5, no 10 (7 octobre 2019) : 207. http://dx.doi.org/10.3390/universe5100207.

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We study how to efficiently control an interacting few-body system consisting of three harmonically trapped bosons. Specifically, we investigate the process of modulating the inter-particle interactions to drive an initially non-interacting state to a strongly interacting one, which is an eigenstate of a chosen Hamiltonian. We also show that for unbalanced subsystems, where one can individually control the different inter- and intra-species interactions, complex dynamics originate when the symmetry of the ground state is broken by phase separation. However, as driving the dynamics too quickly can result in unwanted excitations of the final state, we optimize the driven processes using shortcuts to adiabaticity, which are designed to reduce these excitations at the end of the interaction ramp, ensuring that the target eigenstate is reached.
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Tuszynski, J. A., et M. Kibler. « The formation of coherent structures in strongly interacting q-boson systems ». Journal of Physics A : Mathematical and General 25, no 9 (7 mai 1992) : 2425–35. http://dx.doi.org/10.1088/0305-4470/25/9/016.

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32

Krauth, W., et N. Trivedi. « Mott and Superfluid Transitions in a Strongly Interacting Lattice Boson System ». Europhysics Letters (EPL) 14, no 7 (1 avril 1991) : 627–32. http://dx.doi.org/10.1209/0295-5075/14/7/003.

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33

Mazuz-Harpaz, Yotam, Kobi Cohen, Michael Leveson, Ken West, Loren Pfeiffer, Maxim Khodas et Ronen Rapaport. « Dynamical formation of a strongly correlated dark condensate of dipolar excitons ». Proceedings of the National Academy of Sciences 116, no 37 (26 août 2019) : 18328–33. http://dx.doi.org/10.1073/pnas.1903374116.

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Strongly interacting bosons display a rich variety of quantum phases, the study of which has so far been focused in the dilute regime, at a fixed number of particles. Here we demonstrate the formation of a dense Bose–Einstein condensate in a long-lived dark spin state of 2D dipolar excitons. A dark condensate of weakly interacting excitons is very fragile, being unstable against a coherent coupling of dark and bright spin states. Remarkably, we find that strong dipole–dipole interactions stabilize the dark condensate. As a result, the dark phase persists up to densities high enough for a dark quantum liquid to form. The striking experimental observation of a step-like dependence of the exciton density on the pump power is reproduced quantitatively by a model describing the nonequilibrium dynamics of driven coupled dark and bright condensates. This unique behavior marks a dynamical condensation to dark states with lifetimes as long as a millisecond, followed by a brightening transition at high densities.
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34

Dutta, Anirban, Rajdeep Sensarma et K. Sengupta. « Role of trap-induced scales in non-equilibrium dynamics of strongly interacting trapped bosons ». Journal of Physics : Condensed Matter 28, no 30 (8 juin 2016) : 30LT01. http://dx.doi.org/10.1088/0953-8984/28/30/30lt01.

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35

POMAROL, ALEX. « STRONGLY INTERACTING ELECTROWEAK THEORIES AND THEIR FIVE-DIMENSIONAL ANALOGS AT THE LHC ». International Journal of Modern Physics A 24, no 01 (10 janvier 2009) : 61–80. http://dx.doi.org/10.1142/s0217751x09042785.

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Strongly interacting theories of electroweak (EW) symmetry breaking provide an elegant solution to the hierarchy problem. In these models the EW symmetry can either be broken without a Higgs or by means of a composite Higgs boson. These scenarios have been recently investigated in the framework of five-dimensional warped models that, according to the AdS/CFT correspondence, have a four-dimensional holographic interpretation in terms of strongly coupled field theories. We describe the minimal Higgsless and composite Higgs model and show how they can successfully pass all the electroweak precision tests and solve the flavor problems. We explore the implications of these models at the LHC (Large Hadron Collider).
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36

Garcia-March, M. A., N. L. Harshman, H. da Silva, T. Fogarty, Th Busch, M. Lewenstein et A. Ferrando. « Graded-index optical fiber emulator of an interacting three-atom system : illumination control of particle statistics and classical non-separability ». Quantum 3 (9 décembre 2019) : 210. http://dx.doi.org/10.22331/q-2019-12-09-210.

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We show that a system of three trapped ultracold and strongly interacting atoms in one-dimension can be emulated using an optical fiber with a graded-index profile and thin metallic slabs. While the wave-nature of single quantum particles leads to direct and well known analogies with classical optics, for interacting many-particle systems with unrestricted statistics such analoga are not straightforward. Here we study the symmetries present in the fiber eigenstates by using discrete group theory and show that, by spatially modulating the incident field, one can select the atomic statistics, i.e., emulate a system of three bosons, fermions or two bosons or fermions plus an additional distinguishable particle. We also show that the optical system is able to produce classical non-separability resembling that found in the analogous atomic system.
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37

Strepparola, E., et M. P. Tosi. « Static and Dynamic Properties of a Two-Dimensional Charged Bose Fluid ». Modern Physics Letters B 12, no 12 (20 mai 1998) : 459–65. http://dx.doi.org/10.1142/s0217984998000561.

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A complete solution of the Singwi–Tosi–Land–Sjölander approximation is given for the ground state and the elementary excitations of a fluid of charged bosons interacting via the two-dimensional ln (r) Coulomb potential at arbitrarily large coupling strength r s . The results are used to discuss the limitations of a static-mean-field approach in such a strongly correlated system.
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38

Kolley, F., M. Piraud, I. P. McCulloch, U. Schollwöck et F. Heidrich-Meisner. « Strongly interacting bosons on a three-leg ladder in the presence of a homogeneous flux ». New Journal of Physics 17, no 9 (9 septembre 2015) : 092001. http://dx.doi.org/10.1088/1367-2630/17/9/092001.

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39

Roscilde, Tommaso, Michael F. Faulkner, Steven T. Bramwell et Peter C. W. Holdsworth. « From quantum to thermal topological-sector fluctuations of strongly interacting Bosons in a ring lattice ». New Journal of Physics 18, no 7 (1 juillet 2016) : 075003. http://dx.doi.org/10.1088/1367-2630/18/7/075003.

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40

HALDAR, SUDIP KUMAR, et BARNALI CHAKRABARTI. « DYNAMICAL FEATURES OF SHANNON INFORMATION ENTROPY OF BOSONIC CLOUD IN A TIGHT TRAP ». International Journal of Modern Physics B 27, no 13 (15 mai 2013) : 1350048. http://dx.doi.org/10.1142/s0217979213500483.

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We calculate Shannon information entropy of trapped interacting bosons in both the position and momentum spaces, Sr and Sk, respectively. The total entropy maintains the functional form S = a + b ln N for repulsive bosons. At the noninteracting limit the lower bound of entropic uncertainty relation is also satisfied whereas the diverging behavior of Sr and Sk at the critical point of collapse for attractive condensate accurately calculates the stability factor. Next we study the dynamics of Shannon information entropy with varying interparticle potential. We numerically solve the time-dependent Gross–Pitaevskii equation and study the influence of increasing nonlinearity in the dynamics of entropy uncertainty relation (EUR). We observe that for small nonlinearity the dynamics is regular. With increase in nonlinearity although Shannon entropy shows large variation in amplitude of the oscillation, the EUR is maintained throughout time for all cases and it confirms its generality. We also study the dynamics in a very tight trap when the condensate becomes highly correlated and strongly inhomogeneous. Time evolution of total entropy exhibits aperiodic and fluctuating nature in very tight trap. We also calculate Landsberg's order parameter for various interaction strengths which supports earlier observation that entropy and order are decoupled.
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41

Cvetič, G., et R. Kögerler. « Strongly interacting gauge boson sector in an electroweak theory with “hidden” gauge symmetry ». Nuclear Physics B 353, no 2 (avril 1991) : 462–92. http://dx.doi.org/10.1016/0550-3213(91)90344-w.

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42

Dobado, A., et Maria J. Herrero. « Testing the hypothesis of strongly interacting longitudinal weak bosons in electron-positron collisions at TeV energies ». Physics Letters B 233, no 3-4 (décembre 1989) : 505–11. http://dx.doi.org/10.1016/0370-2693(89)91349-x.

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43

SCHÄFER, A., B. MÜLLER et J. REINHARDT. « CONSEQUENCES OF A HYPOTHETICAL LIGHT VECTOR BOSON IN NUCLEAR DECAYS ». Modern Physics Letters A 02, no 03 (mars 1987) : 159–62. http://dx.doi.org/10.1142/s0217732387000203.

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We show that a light neutral vector boson in the mass range 1–2 MeV with coupling to three photons would strongly mix with virtual photons in the presence of strong electric fields. Bounds on the strength of the vector boson-three photon interaction can be derived from the measure pair-conversion coefficients for excited states in heavy nuclei. A measurement of the 3γ decay rate of suitable nuclear excited states is suggested.
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44

Ziegler, K. « Controlling dynamical entanglement in a Josephson tunneling junction ». International Journal of Modern Physics B 31, no 32 (18 décembre 2017) : 1750255. http://dx.doi.org/10.1142/s0217979217502551.

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We analyze the evolution of an entangled many-body state in a Josephson tunneling junction and its dependence on the number of bosons and interaction strength. A N00N state, which is a superposition of two complementary Fock states, appears in the evolution with sufficient probability only for a moderate many-body interaction on an intermediate time scale. This time scale is inversely proportional to the tunneling rate. Many-body interaction strongly supports entanglement: The probability for creating an entangled state decays exponentially with the number of particles without many-body interaction, whereas it decays only like the inverse square root of the number of particles in the presence of many-body interaction.
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45

Rossi, Giancarlo. « A road towards a beyond the Standard Model model ». EPJ Web of Conferences 258 (2022) : 06003. http://dx.doi.org/10.1051/epjconf/202225806003.

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In this talk we describe examples of renormalizable strongly interacting field theories where chiral symmetry, broken at the UV cutoff by the presence of some irrelevant d > 4 operators in the fundamental Lagrangian, is recovered at low energy owing to the tuning of certain Lagrangian parameters. The interference of UV effects with IR features coming from the spontaneous breaking of the recovered chiral symmetry yields non perturbatively generated elementary fermion masses parametrically expressed by formulae of the kind mq ~ Cq(α)ΛRGI with α the gauge coupling constant and ΛRGI the RGI scale of the theory. Upon introducing EW interactions, this mechanism can be extended to give mass to EW bosons and leptons and can thus be used as an alternative to the Higgs scenario. In order to give the top quark and the weak gauge bosons a mass of the phenomenologically correct order of magnitude, the model must necessarily include (yet unobserved) super-strongly interacting massive fermions endowed, besides ordinary Standard Model interactions, with super-strong interactions with a RGI scale, ΛT ΛQCD in the few TeV range. Though limited in its scope (here we ignore hypercharge and leptons and discuss only the case of one family neglecting weak isospin splitting), the model opens the way to a solution of the naturalness problem and an understanding of the fermion mass hierarchy.
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46

Chatterjee, Budhaditya, Marios C. Tsatsos et Axel U. J. Lode. « Correlations of strongly interacting one-dimensional ultracold dipolar few-boson systems in optical lattices ». New Journal of Physics 21, no 3 (28 mars 2019) : 033030. http://dx.doi.org/10.1088/1367-2630/aafa93.

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47

Bera, S., B. Chakrabarti, A. Gammal, M. C. Tsatsos, M. L. Lekala, B. Chatterjee, C. Lévêque et A. U. J. Lode. « Sorting Fermionization from Crystallization in Many-Boson Wavefunctions ». Scientific Reports 9, no 1 (29 novembre 2019). http://dx.doi.org/10.1038/s41598-019-53179-1.

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AbstractFermionization is what happens to the state of strongly interacting repulsive bosons interacting with contact interactions in one spatial dimension. Crystallization is what happens for sufficiently strongly interacting repulsive bosons with dipolar interactions in one spatial dimension. Crystallization and fermionization resemble each other: in both cases – due to their repulsion – the bosons try to minimize their spatial overlap. We trace these two hallmark phases of strongly correlated one-dimensional bosonic systems by exploring their ground state properties using the one- and two-body density matrix. We solve the N-body Schrödinger equation accurately and from first principles using the multiconfigurational time-dependent Hartree for bosons (MCTDHB) and for fermions (MCTDHF) methods. Using the one- and two-body density, fermionization can be distinguished from crystallization in position space. For N interacting bosons, a splitting into an N-fold pattern in the one-body and two-body density is a unique feature of both, fermionization and crystallization. We demonstrate that this splitting is incomplete for fermionized bosons and restricted by the confinement potential. This incomplete splitting is a consequence of the convergence of the energy in the limit of infinite repulsion and is in agreement with complementary results that we obtain for fermions using MCTDHF. For crystalline bosons, in contrast, the splitting is complete: the interaction energy is capable of overcoming the confinement potential. Our results suggest that the spreading of the density as a function of the dipolar interaction strength diverges as a power law. We describe how to distinguish fermionization from crystallization experimentally from measurements of the one- and two-body density.
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48

Biswas, Anirban, et Sarif Khan. « (g − 2)e, μ and strongly interacting dark matter with collider implications ». Journal of High Energy Physics 2022, no 7 (juillet 2022). http://dx.doi.org/10.1007/jhep07(2022)037.

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Abstract The quest for new physics beyond the Standard Model is boosted by the recently observed deviation in the anomalous magnetic moments of muon and electron from their respective theoretical prediction. In the present work, we have proposed a suitable extension of the minimal Lμ − Lτ model to address these two experimental results as the minimal model is unable to provide any realistic solution. In our model, a new Yukawa interaction involving first generation of leptons, a singlet vector like fermion (χ±) and a scalar (either an SU(2)L doublet $$ {\Phi}_4^{\prime } $$ Φ 4 ′ or a complex singlet $$ {\Phi}_4^{\prime } $$ Φ 4 ′ ) provides the additional one loop contribution to ae only on top of the usual contribution coming from the Lμ− Lτ gauge boson (Zμτ) to both electron and muon. The judicious choice of Lμ − Lτ charges to these new fields results in a strongly interacting scalar dark matter in $$ \mathcal{O} $$ O (MeV) range after taking into account the bounds from relic density, unitarity and self interaction. The freeze-out dynamics of dark matter is greatly influenced by 3 → 2 scatterings while the kinetic equilibrium with the SM bath is ensured by 2 → 2 scatterings with neutrinos where Zμτ plays a pivotal role. The detection of dark matter is possible directly through scatterings with nuclei mediated by the SM Z bosons. Moreover, our proposed model can also be tested in the upcoming e+e− colliders by searching opposite sign di-electron and missing energy signal i.e. "Image missing" at the final state.
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49

White, M., M. Pasienski, D. McKay, S. Q. Zhou, D. Ceperley et B. DeMarco. « Strongly Interacting Bosons in a Disordered Optical Lattice ». Physical Review Letters 102, no 5 (5 février 2009). http://dx.doi.org/10.1103/physrevlett.102.055301.

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50

Buonsante, P., S. M. Giampaolo, F. Illuminati, V. Penna et A. Vezzani. « Mixtures of Strongly Interacting Bosons in Optical Lattices ». Physical Review Letters 100, no 24 (17 juin 2008). http://dx.doi.org/10.1103/physrevlett.100.240402.

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