Academic literature on the topic 'Quantum Vacuum Fluctuations'

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Journal articles on the topic "Quantum Vacuum Fluctuations"

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Naixement, Luciano, and Carlos H. Béssa. "Quantum vacuum fluctuations in inorganic compound CdSe." MOMENTO, no. 66 (January 2, 2023): 23–40. http://dx.doi.org/10.15446/mo.n66.103486.

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In the present work, we study the quantum vacuum fluctuations at finite temperature in the propagation of light in nonlinear optical media. We present nonlinear materials, that have the second-order electrical susceptibility tensor, and the fluctuating effective refractive index caused by fluctuating vacuum electric fields. Likewise, we study the fluctuations of the vacuum, which led to the contributions of thermal and mixed fluctuations being associated with a faithful test function to perform the calculations, in contrast to the Lorentzian distribution. We show the contribution of thermal and mixed fluctuations to time-of-flight fluctuations compared to the contributions of vacuum fluctuations. The result reveals a numerical estimate performed on cadmium selenide (CdSe) suggesting that the effects of fluctuations can cause uncertainty in time of flight due to quantum vacuum fluctuations in terms of thermal and mixed fluctuations.
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Reynaud, Serge, Astrid Lambrecht, Cyriaque Genet, and Marc-Thierry Jaekel. "Quantum vacuum fluctuations." Comptes Rendus de l'Académie des Sciences - Series IV - Physics 2, no. 9 (November 2001): 1287–98. http://dx.doi.org/10.1016/s1296-2147(01)01270-7.

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Sidharth, B. G. "Fluctuations in the quantum vacuum." Chaos, Solitons & Fractals 14, no. 1 (July 2002): 167–69. http://dx.doi.org/10.1016/s0960-0779(01)00196-5.

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Elizalde, E. "Cosmological Imprint of Quantum Vacuum Fluctuations." EAS Publications Series 30 (2008): 149–56. http://dx.doi.org/10.1051/eas:0830017.

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Bethke, Laura, and João Magueijo. "Chiral vacuum fluctuations in quantum gravity." Journal of Physics: Conference Series 360 (May 16, 2012): 012003. http://dx.doi.org/10.1088/1742-6596/360/1/012003.

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Santos, Emilio. "Quantum vacuum fluctuations and dark energy." Astrophysics and Space Science 326, no. 1 (November 21, 2009): 7–10. http://dx.doi.org/10.1007/s10509-009-0204-6.

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Zhukovskii, V. Ch, and I. B. Morozov. "Quantum fluctuations of the ?Copenhagen vacuum?" Soviet Physics Journal 29, no. 5 (May 1986): 399–403. http://dx.doi.org/10.1007/bf00895302.

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Yosifov, Alexander Y., and Lachezar G. Filipov. "Nonlocal Black Hole Evaporation and Quantum Metric Fluctuations via Inhomogeneous Vacuum Density." Advances in High Energy Physics 2018 (November 8, 2018): 1–9. http://dx.doi.org/10.1155/2018/3131728.

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Inhomogeneity of the actual value of the vacuum energy density is considered in a black hole background. We examine the back-reaction of a Schwarzschild black hole to the highly inhomogeneous vacuum density and argue the fluctuations lead to deviations from general relativity in the near-horizon region. In particular, we found that vacuum fluctuations onto the horizon trigger adiabatic release of quantum information, while vacuum fluctuations in the vicinity of the horizon produce potentially observable metric fluctuations of order of the Schwarzschild radius. Consequently, we propose a form of strong nonviolent nonlocality in which we simultaneously get nonlocal release of quantum information and observable metric fluctuations.
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Zurek, Kathryn M. "On vacuum fluctuations in quantum gravity and interferometer arm fluctuations." Physics Letters B 826 (March 2022): 136910. http://dx.doi.org/10.1016/j.physletb.2022.136910.

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Pervushin, B. E., M. A. Fadeev, A. V. Zinovev, R. K. Goncharov, A. A. Santev, A. E. Ivanova, and E. O. Samsonov. "Quantum random number generator using vacuum fluctuations." Nanosystems: Physics, Chemistry, Mathematics 12, no. 2 (April 29, 2021): 156–60. http://dx.doi.org/10.17586/2220-8054-2021-12-2-156-160.

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Dissertations / Theses on the topic "Quantum Vacuum Fluctuations"

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Schiappacasse, Enrico D. "Beyond Semiclassical Gravity| Quantum Stress Tensor Fluctuations in the Vacuum." Thesis, Tufts University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10812605.

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Large vacuum fluctuations of a quantum stress tensor can be described by the asymptotic behavior of its probability distribution. Here we focus on stress tensor operators which have been averaged with a sampling function in time. The Minkowski vacuum state is not an eigenstate of the time-averaged operator, but can be expanded in terms of its eigenstates. We calculate the probability distribution and the cumulative probability distribution for obtaining a given value in a measurement of the time-averaged operator taken in the vacuum state. In these calculations, we use the normal ordered square of the time derivative of a massless scalar field in Minkowski spacetime as an example of a stress tensor operator. We analyze the rate of decrease of the tail of the probability distribution for different temporal sampling functions, such as compactly supported functions and the Lorentzian function. We find that the tails decrease relatively slowly, as exponentials of fractional powers, in agreement with previous work using the moments of the distribution. Our results lead additional support to the conclusion that large vacuum stress tensor fluctuations are more probable than large thermal fluctuations, and may have observable effects.

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Schiefele, Jürgen. "Casimir-Polder interaction in second quantization." Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2011/5417/.

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The Casimir-Polder interaction between a single neutral atom and a nearby surface, arising from the (quantum and thermal) fluctuations of the electromagnetic field, is a cornerstone of cavity quantum electrodynamics (cQED), and theoretically well established. Recently, Bose-Einstein condensates (BECs) of ultracold atoms have been used to test the predictions of cQED. The purpose of the present thesis is to upgrade single-atom cQED with the many-body theory needed to describe trapped atomic BECs. Tools and methods are developed in a second-quantized picture that treats atom and photon fields on the same footing. We formulate a diagrammatic expansion using correlation functions for both the electromagnetic field and the atomic system. The formalism is applied to investigate, for BECs trapped near surfaces, dispersion interactions of the van der Waals-Casimir-Polder type, and the Bosonic stimulation in spontaneous decay of excited atomic states. We also discuss a phononic Casimir effect, which arises from the quantum fluctuations in an interacting BEC.
Die durch (quantenmechanische und thermische) Fluktuationen des elektromagnetischen Feldes hervorgerufene Casimir-Polder-Wechselwirkung zwischen einem elektrisch neutralen Atom und einer benachbarten Oberfläche stellt einen theoretisch gut untersuchten Aspekt der Resonator-Quantenelektrodynamik (cavity quantum electrodynamics, cQED) dar. Seit kurzem werden atomare Bose-Einstein-Kondensate (BECs) verwendet, um die theoretischen Vorhersagen der cQED zu überprüfen. Das Ziel der vorliegenden Arbeit ist es, die bestehende cQED Theorie für einzelne Atome mit den Techniken der Vielteilchenphysik zur Beschreibung von BECs zu verbinden. Es werden Werkzeuge und Methoden entwickelt, um sowohl Photon- als auch Atom-Felder gleichwertig in zweiter Quantisierung zu beschreiben. Wir formulieren eine diagrammatische Störungstheorie, die Korrelationsfunktionen des elektromagnetischen Feldes und des Atomsystems benutzt. Der Formalismus wird anschließend verwendet, um für in Fallen nahe einer Oberfläche gehaltene BECs Atom-Oberflächen-Wechselwirkungen vom Casimir-Polder-Typ und die bosonische Stimulation des spontanen Zerfalls angeregter Atome zu untersuchen. Außerdem untersuchen wir einen phononischen Casimir-Effekt, der durch die quantenmechanischen Fluktuationen in einem wechselwirkenden BEC entsteht.
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Chatterjee, Sandeep. "Model Studies Of The Hot And Dense Strongly Interacting Matter." Thesis, 2012. http://etd.iisc.ernet.in/handle/2005/2518.

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Ultra-relativisitic heavy ion collisions produce quark gluon plasma-a hot and dense soup of deconfined quarks and gluons akin to the early universe. We study two models in the context of these collisions namely, Polyakov Quark Meson Model (PQM) and Hadron Resonance Gas Model (HRGM).The PQM Model provides us with a simple and intuitive understanding of the QCD equation of state and thermodynamics at non zero temperature and baryon density while the HRGM is the principle model to analyse the hadron yields measured in these experiments across the entire range of beam energies. We study the effect of including the commonly neglected fermionic vacuum fluctuations to the (2+1) flavor PQM model. The conventional PQM model suffers from a rapid phase transition contrary to what is found through lattice simulations. Addition of the vacuum term tames the rapid transition and significantly improves the model’s agreement to lattice data. We further investigate the role of the vacuum term on the phase diagram. The smoothening effect of the vacuum term persists even at non zero . Depending on the value of the mass of the sigma meson, including the vacuum term results in either pushing the critical end point into higher values of the chemical potential or excluding the possibility of a critical end point altogether. We compute the fluctuations(correlations) of conserved charges up to sixth(fourth) order. Comparison is made with lattice data wherever available and overall good qualitative agreement is found, more so for the case of the normalised susceptibilities. The model predictions for the ratio of susceptibilities approach to that of an ideal gas of hadrons as in HRGM at low temperatures while at high temperature the values are close to that of an ideal gas of massless quarks. We examine the stability of HRGMs by extending them to take care of undiscovered resonances through the Hagedorn formula. We find that the influence of unknown resonances on thermodynamics is large but bounded. We model the decays of resonances and investigate the ratios of particle yields in heavy-ion collisions. We find that extending these models do not have much effect on hydrodynamics but the hadron yield ratios show better agreement with experiment. In principle HRGMs are internally consistent up to a temperature higher than the cross over temperature in QCD; but by examining quark number susceptibilities we find that their region of applicability seems to end even below the QCD cross over.
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Books on the topic "Quantum Vacuum Fluctuations"

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Spatio-temporal chaos and vacuum fluctuations of quantized fields. New Jersey: World Scientific, 2002.

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Milonni, Peter W. An Introduction to Quantum Optics and Quantum Fluctuations. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780199215614.001.0001.

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This book is an introduction to quantum optics for students who have studied electromagnetism and quantum mechanics at an advanced undergraduate or graduate level. It provides detailed expositions of theory with emphasis on general physical principles. Foundational topics in classical and quantum electrodynamics, including the semiclassical theory of atom-field interactions, the quantization of the electromagnetic field in dispersive and dissipative media, uncertainty relations, and spontaneous emission, are addressed in the first half of the book. The second half begins with a chapter on the Jaynes-Cummings model, dressed states, and some distinctly quantum-mechanical features of atom-field interactions, and includes discussion of entanglement, the no-cloning theorem, von Neumann’s proof concerning hidden variable theories, Bell’s theorem, and tests of Bell inequalities. The last two chapters focus on quantum fluctuations and fluctuation-dissipation relations, beginning with Brownian motion, the Fokker-Planck equation, and classical and quantum Langevin equations. Detailed calculations are presented for the laser linewidth, spontaneous emission noise, photon statistics of linear amplifiers and attenuators, and other phenomena. Van der Waals interactions, Casimir forces, the Lifshitz theory of molecular forces between macroscopic media, and the many-body theory of such forces based on dyadic Green functions are analyzed from the perspective of Langevin noise, vacuum field fluctuations, and zero-point energy. There are numerous historical sidelights throughout the book, and approximately seventy exercises.
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Reynaud, Serge, and Astrid Lambrecht. Casimir forces and vacuum energy. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198768609.003.0009.

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The Casimir force is an effect of quantum vacuum field fluctuations, with applications in many domains of physics. The ideal expression obtained by Casimir, valid for perfect plane mirrors at zero temperature, has to be modified to take into account the effects of the optical properties of mirrors, thermal fluctuations, and geometry. After a general introduction to the Casimir force and a description of the current state of the art for Casimir force measurements and their comparison with theory, this chapter presents pedagogical treatments of the main features of the theory of Casimir forces for one-dimensional model systems and for mirrors in three-dimensional space.
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Kachelriess, Michael. Free scalar field. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198802877.003.0003.

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In this chapter, the path integral approach is extended from quantum mechanics to the simplest field theory containing a single real scalar field. First the generating functionals of (dis-) connected n-point Green functions are introduced, then the Feynman propagator of the scalar field is derived and causality is discussed. The exchange of a space-like scalar particle between two static sources is examined and it is shown that it leads to an attractive Yukawa potential. The Casimir effect is used to demonstrate that vacuum fluctuations have physical consequences.
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Maggiore, Michele. Gravitational Waves. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198570899.001.0001.

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A comprehensive and detailed account of the physics of gravitational waves and their role in astrophysics and cosmology. The part on astrophysical sources of gravitational waves includes chapters on GWs from supernovae, neutron stars (neutron star normal modes, CFS instability, r-modes), black-hole perturbation theory (Regge-Wheeler and Zerilli equations, Teukoslky equation for rotating BHs, quasi-normal modes) coalescing compact binaries (effective one-body formalism, numerical relativity), discovery of gravitational waves at the advanced LIGO interferometers (discoveries of GW150914, GW151226, tests of general relativity, astrophysical implications), supermassive black holes (supermassive black-hole binaries, EMRI, relevance for LISA and pulsar timing arrays). The part on gravitational waves and cosmology include discussions of FRW cosmology, cosmological perturbation theory (helicity decomposition, scalar and tensor perturbations, Bardeen variables, power spectra, transfer functions for scalar and tensor modes), the effects of GWs on the Cosmic Microwave Background (ISW effect, CMB polarization, E and B modes), inflation (amplification of vacuum fluctuations, quantum fields in curved space, generation of scalar and tensor perturbations, Mukhanov-Sasaki equation,reheating, preheating), stochastic backgrounds of cosmological origin (phase transitions, cosmic strings, alternatives to inflation, bounds on primordial GWs) and search of stochastic backgrounds with Pulsar Timing Arrays (PTA).
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Book chapters on the topic "Quantum Vacuum Fluctuations"

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Jaekel, Marc-Thierry, and Serge Reynaud. "Vacuum Fluctuations and Accelerated Frames." In Coherence and Quantum Optics VII, 153–58. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4757-9742-8_20.

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Verch, R. "Vacuum Fluctuations, Geometric Modular Action and Relativistic Quantum Information Theory." In Special Relativity, 133–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/3-540-34523-x_6.

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Zubairy, M. S., J. Anwar, and S. Y. Zhu. "Reduction of Quantum Phase Fluctuations in a Laser Via Squeezed Vacuum Reservoir." In Coherence and Quantum Optics VII, 463–64. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4757-9742-8_105.

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Boi, Luciano. "Creating the Physical World ex nihilo? On the Quantum Vacuum and Its Fluctuations." In The Two Cultures: Shared Problems, 51–97. Milano: Springer Milan, 2009. http://dx.doi.org/10.1007/978-88-470-0869-4_5.

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"Vacuum Fluctuations." In Classical and Quantum Statistical Physics, 112–21. Cambridge University Press, 2022. http://dx.doi.org/10.1017/9781108952002.008.

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Milonni, Peter W. "Interaction Hamiltonian and Spontaneous Emission." In An Introduction to Quantum Optics and Quantum Fluctuations, 205–68. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780199215614.003.0004.

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The atom-field interaction is formulated within the fully quantized-field theory, starting from a detailed analysis of the transformation from the fundamental minimal coupling interaction Hamiltonian to the electric dipole Hamiltonian used extensively in quantum optics. Spontaneous emission, radiative level shifts, and the natural radiative lineshape are treated in both the Schrodinger and Heisenberg pictures, with emphasis on the roles of vacuum field fluctuations, radiation reaction, and the fluctuation-dissipation relation between them. The shortcomings of semiclassical radiation theories are discussed.
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Ford, L. H. "Quantum Fluctuations of Fields and Stress Tensors." In The State of the Quantum Vacuum, 165–86. WORLD SCIENTIFIC, 2022. http://dx.doi.org/10.1142/9789811266089_0007.

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Modanese, Giovanni. "Anomalous Gravitational Vacuum Fluctuations Which Act as Virtual Oscillating Dipoles." In Quantum Gravity. InTech, 2012. http://dx.doi.org/10.5772/35910.

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Milonni, Peter W. "Dipole Interactions and Fluctuation-Induced Forces." In An Introduction to Quantum Optics and Quantum Fluctuations, 409–512. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780199215614.003.0007.

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Concepts considered in earlier chapters, especially vacuum field fluctuations and zero-point energy, are applied to van der Waals, Casimir, and dipole-dipole resonance interactions, and to field quantization in dissipative dielectric media. Detailed but physically motivated calculations are presented regarding the Lifshitz theory, Casimir and Casimir-Polder forces, and the many-body theory of van der Waals and Casimir interactions based on dyadic Green functions. Expressions for quantized fields in dispersive and dissipative media are derived straightforwardly from Langevin noise theory, and it is shown how this approach is related to the more complicated Fano diagonalization method. Zero-point field energy in dissipative media and its role in Casimir and other effects is discussed in relation to other physical interpretations. Other topics discussed are (Forster) fluorescence resonance energy transfer and the modification of spontaneous emission rates by reflectors and host dielectric media.
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Kenyon, Ian R. "Field quantization." In Quantum 20/20, 129–50. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198808350.003.0008.

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Field or second quantization is carried through for electromagnetism, giving creation and annihilation operators for photons. Vacuum energy arises from field fluctuations, which causes the Casimir force and the Lamb shift of spectral lines. The connection between absorption, spontaneous emission and the stimulated emission of radiation is shown to emerge naturally. This yields Einstein’s equations for radiation in thermal equilibrium. The prerequisites for lasing, the operation and the properties of lasers are described. Fully coherent (Laser) states are expressed in terms of Fock states. The first and second order coherence of lasers and thermal sources are worked out. The Hanbury Brown and Twiss experiment is described and the application of the principle to determining stellar sizes and interaction regions in particle collisions from meson correlations are described.
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Conference papers on the topic "Quantum Vacuum Fluctuations"

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Gevorkyan, A. S., C. Burdik, K. B. Oganesyan, and Andrei Yu Khrennikov. "Quantum Harmonic Oscillator Subjected to Quantum Vacuum Fluctuations." In QUANTUM THEORY: Reconsideration of Foundations—5. AIP, 2010. http://dx.doi.org/10.1063/1.3431497.

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Goto, Shin-itiro, Robin W. Tucker, and Timothy J. Walton. "Quantum electromagnetic vacuum fluctuations in inhomogeneous dielectric media." In SPIE Optics + Optoelectronics, edited by Ivan Prochazka and Jaromír Fiurásek. SPIE, 2011. http://dx.doi.org/10.1117/12.886255.

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Davies, P. C. W. "Vacuum Viscosity and Quantum Noise: From Atoms to Galaxies." In Unsolved problems of noise and fluctuations. AIP, 2000. http://dx.doi.org/10.1063/1.59972.

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Seriu, Masafumi, J. G. Hartnett, and P. C. Abbott. "Fundamental effects in the measurement of quantum vacuum fluctuations." In FRONTIERS OF FUNDAMENTAL AND COMPUTATIONAL PHYSICS: 10th International Symposium. AIP, 2010. http://dx.doi.org/10.1063/1.3460195.

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Di Piazza, A., K. Z. Hatsagortsyan, J. Evers, and C. H. Keitel. "Vacuum fluctuations and nuclear quantum optics in strong laser pulses." In SPIE Fourth International Symposium on Fluctuations and Noise, edited by Leon Cohen. SPIE, 2007. http://dx.doi.org/10.1117/12.724398.

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Schonenberger, Christian, and Stefan Oberholzer. "Shot noise: from Schottky's vacuum tube to present-day quantum devices." In Second International Symposium on Fluctuations and Noise, edited by Dragana Popovic, Michael B. Weissman, and Zoltan A. Racz. SPIE, 2004. http://dx.doi.org/10.1117/12.544211.

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Symul, T., S. M. Assad, and P. K. Lam. "Fast real-time random numbers from vacuum fluctuations." In 2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC. IEEE, 2013. http://dx.doi.org/10.1109/cleoe-iqec.2013.6801731.

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Ansoldi, Stefano. "Quantum fluctuations of the gravitational field and propagation of light: A heuristic approach." In Quantum electrodynamics and physics of the vacuum. AIP, 2001. http://dx.doi.org/10.1063/1.1374983.

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Breuer, Markus, Christian Homann, Stefan Lochbrunner, and Eberhard Riedle. "Noncollinear optical parametric amplification of cw light, continua and vacuum fluctuations." In 2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference. IEEE, 2007. http://dx.doi.org/10.1109/cleoe-iqec.2007.4386837.

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Tanizawa, Ken, Kentaro Kato, and Fumio Futami. "Four-Channel Parallel Broadband Quantum Entropy Source for True Random Number Generation at 100 Gbps." In CLEO: Applications and Technology. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_at.2022.am3d.6.

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We demonstrate a spatially-multiplexed quantum entropy source with a low-loss 1×8 Silica PLC splitter. Four-channel quantum randomness with 4-GHz/ch bandwidth, based on vacuum fluctuations, is generated, and random bits at 100 Gbps are extracted offline.
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