Literatura académica sobre el tema "Open quantum system, quantum thermodynamics, quantum sensing"
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Artículos de revistas sobre el tema "Open quantum system, quantum thermodynamics, quantum sensing"
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Collin, E. "Mesoscopic quantum thermo-mechanics: A new frontier of experimental physics". AVS Quantum Science 4, n.º 2 (junio de 2022): 020501. http://dx.doi.org/10.1116/5.0086059.
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In the last decade, experimentalists have demonstrated their impressive ability to control mechanical modes within mesoscopic objects down to the quantum level: it is now possible to create mechanical Fock states, to entangle mechanical modes from distinct objects, and to store quantum information or transfer it from one quantum bit to another, among the many possibilities found in today's literature. Indeed, mechanics is quantum, very much like spins or electromagnetic degrees of freedom; and all of this is, in particular, referred to as a new engineering resource for quantum technologies. However, there is also much more beyond this utilitarian aspect: invoking the original discussions of Braginsky and Caves, where a quantum oscillator is thought of as a quantum detector for a classical field, namely, a gravitational wave, which is also a unique sensing capability for quantum fields. The subject of study is then the baths to which the mechanical mode is coupled to, let them be known or unknown in nature. This Perspective is about this new potentiality that addresses stochastic thermodynamics, potentially down to its quantum version, the search for a fundamental underlying (random) field postulated in recent theories that can be affiliated to the class of the wave-function collapse models, and more generally open questions of condensed matter like the actual nature of the elusive (and ubiquitous) two-level systems present within all mechanical objects. However, such research turns out to be much more demanding than the use of a few quantum mechanical modes: all the known baths have to be identified, experiments have to be conducted in-equilibrium, and the word “mechanics” needs to be justified by a real ability to move substantially the center-of-mass when a proper drive tone is applied to the system.
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Xu, Youyang. "Work Measurement in OPEN Quantum System". Entropy 24, n.º 2 (25 de enero de 2022): 180. http://dx.doi.org/10.3390/e24020180.
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Work is an important quantity in thermodynamics. In a closed quanutm system, the two-point energy measurements can be applied to measure the work but cannot be utilized in an open quantum system. With the two-point energy measurements, it has been shown that the work fluctuation satisfies the Jarzynski equality. We propose a scheme to measure the work in an open quantum system through the technique of reservoir engineering. Based on this scheme, we show that the work fluctuation in open quantum system may violate the Jarzynski equality. We apply our scheme to a two-level atom coupled to an engineered reservoir and numerically justify the general results, especially demonstrating that the second law of thermodynamics can be violated.
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P, Renati. "Relationships and Causation in Living Matter: Reframing Some Methods in Life Sciences?" Physical Science & Biophysics Journal 6, n.º 2 (5 de julio de 2022): 1–25. http://dx.doi.org/10.23880/psbj-16000217.
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In this paper I want to enrich, on the methodological and epistemological side, an earlier review of mine (in which there are more details on the physics of electrodynamic coherence), aiming to stimulate attention to some seemingly trivial or irrelevant aspects, but, in my opinion, very subtle and of crucial importance in the study of living dynamics in various disciplines (physics, biology, medicine, philosophy of science). The conceptual core is: to understand that a living system cannot be conceived, and therefore neither studied, as “an object”, “a body.” The (in essence) relational nature of the living being finds its foundations in dissipation, symmetry breakings and field theories capable to count for multiple levels of vacuum (such as Quantum Field Theory, QFT), and sees the living phase of condensed matter (on an aqueous basis) as a consequence of bosonic condensation of correlation quanta (the well-known Nambu-Goldstone bosons) over an extended and interrelated hierarchy of degrees of freedom to which a (super)coherent is associated state. In there the matter and energy components of the biological system are subjected to phase correlations to give rise to a holo-state, shared over the whole system, from which a self, endowed with continuity, emerges and thus also a biological identity rooted in a dissipative thermodynamic history. However, this “identity” is like the river of Heraclitus’ anecdote: it is a flow and not an object existing in itself, nor static; dynamics, change, are all that lasts, while water, is always different. So holds for an organism that is, in fact, an organizationally closed system, but (and precisely because) thermodynamically open. This condition implies that the study of any biological system is de facto the study of a flow of relationships, and the living system (whether a cell, a complex organism, or an ecosystem) should be conceived as a process dissipatively coupled to its environment and as a producer of responses following an autopoietic order, inherent in the very condition of coherence (as long as it exists). Once this is recognized: • We obtain the possibility of reducing (without ontological discontinuities) sophisticated emergent properties (such as sensing, perception, semantics, teleology, adaptation, memory) irreducible to the deterministic laws of the elementary components of which, nonetheless, the living matter is composed (and to the laws of which it is therefore equally subjected); • Such properties result in the emergence of “biological laws” that, in addition to physical laws, dictating action-reaction relationships, describe stimulus-response relationships (with enormously greater logical openness) valid only for the living state; • The existence of these “laws” (analogical, but now physically grounded) forces us to revisit the definition of causality in biology, understanding that the method of inquiry must be revisited on both the theory and praxis fronts (details in the text); • It is understood that the complex view is to be applied ab initio, but also advanced to a further step (on a quantum-electrodynamic basis) in which the occurrence of not-only-diachronic causality in the living matter would be uncontemplable through “classical” observables only, considered within dynamical systems theory, chaos physics and complexity science. This gives rise to constructive methodological provocations, significant for research in biology, biophysics, and medicine, and for their application within humankind and its relationships to technology and Nature, in the name of a respectful and sensitive gesture towards the web of Life.
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Cavina, Vasco, Andrea Mari y Vittorio Giovannetti. "Slow Dynamics and Thermodynamics of Open Quantum Systems". Proceedings 12, n.º 1 (10 de julio de 2019): 19. http://dx.doi.org/10.3390/proceedings2019012019.
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We develop a perturbation theory to estimate the finite time corrections around a quasi static trajectory, in which a quantum system is able to equilibrate at each instant with its environment. The results are then applied to non equilibrium thermodynamics, in which context we are able to provide a connection between the irreversible contributions and the microscopic details of the dynamical map generating the evolution. Turning the attention to finite time Carnot engines, we found a universal connection between the spectral density esponent of the hot/cold thermal baths and the efficiency at maximum power, giving also a new interpretation to already known results such as the Curzon-Ahborn and the Schmiedl-Seifert efficiencies.
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Argentieri, Giuseppe, Fabio Benatti, Roberto Floreanini y Marco Pezzutto. "Complete Positivity and Thermodynamics in a Driven Open Quantum System". Journal of Statistical Physics 159, n.º 5 (25 de febrero de 2015): 1127–53. http://dx.doi.org/10.1007/s10955-015-1210-4.
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Trushechkin, A. S., M. Merkli, J. D. Cresser y J. Anders. "Open quantum system dynamics and the mean force Gibbs state". AVS Quantum Science 4, n.º 1 (marzo de 2022): 012301. http://dx.doi.org/10.1116/5.0073853.
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The dynamical convergence of a system to the thermal distribution, or Gibbs state, is a standard assumption across all of the physical sciences. The Gibbs state is determined just by temperature and energies of the system. However, at decreasing system sizes, i.e., for nanoscale and quantum systems, the interaction with their environments is not negligible. The question then arises: Is the system's steady state still the Gibbs state? If not, how may the steady state depend on the interaction details? Here, we provide an overview of recent progress on answering these questions. We expand on the state of the art along two general avenues: First, we take the static point-of-view, which postulates the so-called mean force Gibbs state. This view is commonly adopted in the field of strong coupling thermodynamics, where modified laws of thermodynamics and nonequilibrium fluctuation relations are established on the basis of this modified state. Second, we take the dynamical point of view, originating from the field of open quantum systems, which examines the time-asymptotic steady state within two paradigms. We describe the mathematical paradigm, which proves return to equilibrium, i.e., convergence to the mean force Gibbs state, and then discuss a number of microscopic physical methods, particularly master equations. We conclude with a summary of established links between statics and equilibration dynamics and provide an extensive list of open problems. This comprehensive overview will be of interest to researchers in the wider fields of quantum thermodynamics, open quantum systems, mesoscopic physics, statistical physics, and quantum optics and will find applications whenever energy is exchanged on the nanoscale, from quantum chemistry and biology to magnetism and nanoscale heat management.
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Park, Jung Jun y Hyunchul Nha. "Fluctuation Theorem for Information Thermodynamics of Quantum Correlated Systems". Entropy 25, n.º 1 (13 de enero de 2023): 165. http://dx.doi.org/10.3390/e25010165.
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We establish a fluctuation theorem for an open quantum bipartite system that explicitly manifests the role played by quantum correlation. Generally quantum correlations may substantially modify the universality of classical thermodynamic relations in composite systems. Our fluctuation theorem finds a non-equilibrium parameter of genuinely quantum nature that sheds light on the emerging quantum information thermodynamics. Specifically we show that the statistics of quantum correlation fluctuation obtained in a time-reversed process can provide a useful insight into addressing work and heat in the resulting thermodynamic evolution. We illustrate these quantum thermodynamic relations by two examples of quantum correlated systems.
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Strasberg, Philipp. "Thermodynamics of Quantum Causal Models: An Inclusive, Hamiltonian Approach". Quantum 4 (2 de marzo de 2020): 240. http://dx.doi.org/10.22331/q-2020-03-02-240.
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Operational quantum stochastic thermodynamics is a recently proposed theory to study the thermodynamics of open systems based on the rigorous notion of a quantum stochastic process or quantum causal model. In there, a stochastic trajectory is defined solely in terms of experimentally accessible measurement results, which serve as the basis to define the corresponding thermodynamic quantities. In contrast to this observer-dependent point of view, a `black box', which evolves unitarily and can simulate a quantum causal model, is constructed here. The quantum thermodynamics of this big isolated system can then be studied using widely accepted arguments from statistical mechanics. It is shown that the resulting definitions of internal energy, heat, work, and entropy have a natural extension to the trajectory level. The canonical choice of them coincides with the proclaimed definitions of operational quantum stochastic thermodynamics, thereby providing strong support in favour of that novel framework. However, a few remaining ambiguities in the definition of stochastic work and heat are also discovered and in light of these findings some other proposals are reconsidered. Finally, it is demonstrated that the first and second law hold for an even wider range of scenarios than previously thought, covering a large class of quantum causal models based solely on a single assumption about the initial system-bath state.
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Bergmann, Nicolas y Michael Galperin. "A Green’s function perspective on the nonequilibrium thermodynamics of open quantum systems strongly coupled to baths". European Physical Journal Special Topics 230, n.º 4 (12 de abril de 2021): 859–66. http://dx.doi.org/10.1140/epjs/s11734-021-00067-3.
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AbstractWe give a nonequilibrium Green’s function (NEGF) perspective on thermodynamics formulations for open quantum systems that are strongly coupled to baths. A scattering approach implying thermodynamic consideration of a supersystem (system plus baths) that is weakly coupled to external superbaths is compared with the consideration of thermodynamics of a system that is strongly coupled to its baths. We analyze both approaches from the NEGF perspective and argue that the latter yields a possibility of thermodynamic formulation consistent with a dynamical (quantum transport) description.
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SARRIS, C. M. y A. N. PROTO. "THE SU(2) SEMI QUANTUM SYSTEMS DYNAMICS AND THERMODYNAMICS". International Journal of Modern Physics B 24, n.º 25n26 (20 de octubre de 2010): 5037–49. http://dx.doi.org/10.1142/s0217979210057183.
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The dynamical description of a semi quantum nonlinear systems whose classical limit is not chaotic is still an open question. These systems are characterized by mixing a classical system with a quantum-mechanical one. As some of them lead to an irregular dynamics, the name "semi quantum chaos" arises. In this contribution we study two different Hamiltonians through the Maximum Entropy Principle Approach (MEP). Taking advantage of the MEP formalism, it can be clearly established that the Hamiltonians belonging to the SU(2) Lie algebra have common properties and a common treatment can be developed for them. These Hamiltonians resemble a quantum spin system coupled to a classical cavity. In the present contribution, we show that all of them share the generalized uncertainty principle as an invariant of the motion and other invariants as well. Two different classical potentials V(q) have been studied. Their specific heat are evaluated in terms of the extensive (mean values) and the intensive (Lagrange multipliers) variables. The main result of the present contribution is to show that the specific heat of these systems can be fixed independently of the temperature by setting only the initial conditions on the extensive or intensive variables, as well as the value of the quantum-classical coupling parameter. It could be possible to infer that this result can be extended to generalized forms for the V(q) classical potential.
Tesis sobre el tema "Open quantum system, quantum thermodynamics, quantum sensing"
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Cavina, Vasco. "Thermodynamics of open quantum systems: from a critical study to the optimization of non-equilibrium heat engines". Doctoral thesis, Scuola Normale Superiore, 2019. http://hdl.handle.net/11384/85921.
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One of the most relevant aspects of thermodynamics is its universality. Its prescriptions
are ubiquitous in the characterizaton of the energy transfer between systems
at equilibrium, even at the nanoscale, where quantum effects start to become important.
In these models the energy balance is completely described in terms of universal
quantities, like the Helmoltz free energy and the Boltzmann entropy, while the probabilistic
fluctations of work, heat end particle number are tipically negligible making
equilibirum thermodynamics essentially a deterministic theory. There are, however,
plenty of fields in which the equilibrium approach is too limiting, for instance when
dealing with steady state and driven heat engines, researching efficient quantum probes
in metrology and even studying decoherence phenomena in quantum computation. In
the non equilibrium scenario many specific details, usually negligible in the standard
approach, become relevant and a more accurate knowledge of the dynamics is necessary
to improve the capacity of controlling, measuring and manipulating energy, whose puctuations also become larger and larger making the theory intrinsecally stochastic.
The characterization of out of equilibrium quantum system is the principal aim
of this manuscript, which encompasses several aspects of the field. A perturbative
expansion for slowly driven master equations is derived, reproducing the quasi static
equilibrium trajectory for infinitely slow modulations and providing a compact formula
for calculating the deviations on such a behavior. The expansion turns also
to be succesful for the description of low dissipation heat engines, providing interesting
connections between some celebrated efficiencies at maximum power (like the
Schmiedl Seifert and Curzon Ahlborn ones [34, 37]) and the spectral density of the
baths inducing thermalization.
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Gómez, Santiago Hernández. "An NV center as an open quantum system - noise spectroscopy and quantum thermodynamics". Doctoral thesis, 2021. http://hdl.handle.net/2158/1234493.
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The investigation of open quantum systems is extremely wide-ranging and permeates fields as diverse as condensed matter physics, quantum optics, and quantum computation, with the goal of understanding the foundations of decoherence and advancing the performance of quantum-based technologies. A precise knowledge of the interaction of a quantum system with its environment is a crucial prerequisite to effectively hinder the detrimental effect of decoherence via selective decoupling, or to gain partial or full control of the environment itself, enabling complex information transfer and storage protocols that involve entanglement. These techniques represent an asset for the realization of quantum-enhanced devices. However, studying the coupling between a quantum system and its (classic or quantum) environment is often limited by the same lack of information and control that inspires the study in the first place. Thus, a quantum system that is highly controllable and that can be used to gain information on the environment constitutes an attractive tool to approach these problems.
This thesis tackles these challenges by exploiting the Nitrogen-Vacancy (NV) center in diamond, which is an ideal candidate for many quantum technologies. The NV center has emerged as a prominent platform to realize quantum-enhanced sensors with unprecedented combination of high sensitivity and spatial resolution at room temperature. In addition, its outstanding spin properties and optical addressability make the NV center an ultra stable quantum platform with tunable interaction with its environment.
This thesis addresses two complementary objectives: develop quantum control protocols of the NV spin dynamics to accurately characterize the NV environment, and develop new tools to investigate the thermodynamics aspect of the spin dynamics in contact with an engineered energy reservoir.
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Αλατάς, Παναγιώτης. "Application of a non-linear thermodynamic master equation to three-level quantum systems". Thesis, 2014. http://hdl.handle.net/10889/7534.
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In this Master’s thesis, we have focused on the description of three-level quantum systems through master equations for their density matrix, involving a recently proposed non-linear thermodynamic one. The first part is focused on a three-level system interacting with two heat baths, a hot and a cold one. We investigated the rate of heat flow from the hot to the cold bath through the quantum system, and how the steady-state is approached. Additional calculations here refer to the rate of entropy production and the evolution of all elements of the density matrix of the system from an arbitrary initial state to their equilibrium or steady-state value. The results are compared against those of a linear, Lindblad-type master equation designed so that for a quantum system interacting with only one heat bath, the same final Gibbs steady state is attained.
In the second part of this thesis, we focus on the electromagnetically induced transparency (EIT), a phenomenon typically achievable only in atoms with specific energy structures. For a three level system (to which the present study has focused), for example, EIT requires two dipole allowed transitions (the 1-3 and the 2-3) and one forbidden (the 1-2). The phenomenon is observed when a strong laser (termed the control laser) is tuned to the resonant frequency of the upper two levels. Then, as a weak probe laser is scanned in frequency across the other transition, the medium is observed to exhibit both: a) transparency at what was the maximal absorption in the absence of the coupling field, and b) large dispersion effects at the atomic resonance. We discuss the Hamiltonian describing the phenomenon and we present results from two types of master equations: a) an empirically modified Von-Neumann one allowing for decays from each energy state, and b) a typical Lindblad one, with time-dependent operators. In the first case, an analytical solution is possible, which has been confirmed through a direct solution of the full master equation. In the second case, only numerical results can be obtained. We present and compare results from the two master equations for the susceptibility of the system with respect to the probe field, and we discuss them in light also of available experimental data for this very important phenomenon.Η παρούσα εργασία επικεντρώνεται στην περιγραφή των κβαντικών συστημάτων τριών καταστάσεων μέσω εξισώσεων master για την μήτρα πυκνότητας πιθανότητάς τους (density matrix), συμπεριλαμβάνοντας μία πρόσφατα προτεινόμενη μη-γραμμική θερμοδυναμική εξίσωση. Το πρώτο μέρος εστιάζει σε ένα σύστημα τριών καταστάσεων το οποίο βρίσκεται σε αλληλεπίδραση με δύο λουτρά θερμότητας, ένα θερμό και ένα ψυχρό. Εξετάζεται ο ρυθμός ροής θερμότητας από το θερμό προς το ψυχρό λουτρό μέσω του κβαντικού συστήματος, και με ποιον τρόπο επιτυγχάνεται η μόνιμη κατάσταση. Επιπλέον υπολογισμοί αναφέρονται στον ρυθμό παραγωγής της εντροπίας και στην εξέλιξη όλων των στοιχείων της μήτρας πυκνότητας πιθανότητας από μία τυχαία αρχική κατάσταση προς την ισορροπία ή τη μόνιμη κατάσταση. Τα αποτελέσματα παρουσιάζονται συγκριτικά με εκείνα μιας γραμμικής, τύπου Lindblad master εξίσωσης, κατάλληλα σχεδιασμένης ώστε στην ειδική περίπτωση ενός κβαντικού συστήματος σε αλληλεπίδραση με ένα λουτρό θερμότητας επιτυγχάνεται η ίδια τελική μόνιμη κατάσταση Gibbs. Στο δεύτερο μέρος, εστιάζουμε στην ηλεκτρομαγνητικά επαγόμενη διαφάνεια (electromagnetically induced transparency (EIT)), ένα φαινόμενο το οποίο τυπικά είναι εφικτό μόνο σε άτομα με ειδικές ενεργειακές δομές. Για ένα σύστημα τριών καταστάσεων (στο οποίο επικεντρώνεται η παρούσα εργασία), για παράδειγμα, το ΕΙΤ απαιτεί δύο διπολικά επιτρεπτές μεταβάσεις (την 1-3 και την 2-3) και μία απαγορευμένη (την 1-2). Το φαινόμενο παρατηρείται όταν ένα ισχυρό laser (το αποκαλούμενο ως control laser) συντονίζεται στη συχνότητα των δύο άνω ενεργειακών σταθμών. Τότε, καθώς ένα ασθενές probe laser ανιχνεύεται με συχνότητα όμοια με της άλλης επιτρεπόμενης μετάβασης, το μέσο παρατηρείται να εμφανίζει τα εξής: α) διαφάνεια στο σημείο μέγιστης απορρόφησης απουσία του control πεδίου, και β) έντονα φαινόμενα διασποράς στον ατομικό συντονισμό. Θα συζητήσουμε τη Χαμιλτονιανή που περιγράφει το φαινόμενο και θα παρουσιάσουμε αποτελέσματα από δύο εξισώσεις master: α) μία εμπειρική τροποποιημένη Von-Neumann εξίσωση επιτρέποντας τις απώλειες από κάθε ενεργειακή κατάσταση, και β) μία τυπική Lindblad εξίσωση, με χρόνο-εξαρτώμενους τελεστές. Στην πρώτη περίπτωση, είναι πιθανή η εύρεση μιας αναλυτικής λύσης, η οποία έχει επιβεβαιωθεί μέσω μιας άμεσης (direct) λύσης της πλήρους εξίσωσης master. Στη δεύτερη περίπτωση, μπορούν να ληφθούν μόνο αριθμητικά αποτελέσματα. Παρουσιάζονται και συγκρίνονται τα αποτελέσματα που ελήφθησαν από τις δύο master εξισώσεις και αφορούν την επιδεκτικότητα (susceptibility) του συστήματος σε σχέση με το probe πεδίο, και τέλος συζητιούνται σε σχέση με διαθέσιμα πειραματικά δεδομένα γι’ αυτό το πολύ σημαντικό φαινόμενο.
Capítulos de libros sobre el tema "Open quantum system, quantum thermodynamics, quantum sensing"
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Gemmer, Jochen, M. Michel y G. Mahler. "Open System Approach to Transport1". En Quantum Thermodynamics, 241–53. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-70510-9_21.
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Strasberg, Philipp. "Quantum Stochastic Processes". En Quantum Stochastic Thermodynamics, 1–42. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780192895585.003.0001.
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Abstract This chapter describes the basic features of open quantum systems, i.e. quantum systems that are affected by noise due to uncontrollable degrees of freedom of an environment or bath. This noise is responsible for effects such as dissipation,decoherence and irreversibility. We study the equilibrium states of open quantum systems and review tools from quantum measurement theory, which describe how to theory, that describe how to extract information from an (open) quantum system. We generalize these tools to multimulti-time statistics and define the notion of a quantum stochastic process and a quan tum Markov process. Finally, we study in which cases a quantum stochastic process looks classical.
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Strasberg, Philipp. "Outlook". En Quantum Stochastic Thermodynamics, 273–76. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780192895585.003.0006.
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Abstract The final chapter concludes the book by briefly discussing various topics we haven’t touched upon (e.g. simulating non-Markovian open quantum systems, quantum advantages in thermodynamics, resource theories) and lists some prospects for exciting future research avenues (e.g. practical applications in thermoelectrics and beyond, finding accurate reduced system descriptions, finite-bath effects).
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Strasberg, Philipp. "Quantum Thermodynamics Without Measurements". En Quantum Stochastic Thermodynamics, 104–74. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780192895585.003.0003.
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Abstract We derive the basic laws of phenomenological non-equilibrium thermodynamics for small open systems, whose quantum nature can no longer be neglected. Emphasis is put from the beginning on deriving them from an underlying microscopic system on deriving them from an underlying microscopic system–bath picture. Commonly considered approximation schemes (wea k coupling master equations) are reviewed and their thermodynamics is studied. The zeroth law is discussed for small systems and exact identities for the entropy production, valid at strong coupling and in the non non-Markovian regime, are introduced. We discu ss the effect of finite baths even out of equilibrium and use the framework of repeated interactions to study microscopic non-equilibrium resources. The chapter concludes with the study of particle transport and thermoelectric devices, which were realized in experiments. This chapter focuses entirely on the dynamics of a system coupled to a bath without any external interventions.
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"System–Bath Reversible and Irreversible Quantum Dynamics". En Thermodynamics and Control of Open Quantum Systems, 55–68. Cambridge University Press, 2021. http://dx.doi.org/10.1017/9781316798454.006.
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"Quantized System–Bath Interactions". En Thermodynamics and Control of Open Quantum Systems, 40–54. Cambridge University Press, 2021. http://dx.doi.org/10.1017/9781316798454.005.
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"System–Bath Equilibration via Spin-Boson Interaction". En Thermodynamics and Control of Open Quantum Systems, 69–79. Cambridge University Press, 2021. http://dx.doi.org/10.1017/9781316798454.007.
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"Work–Information Relation and System–Bath Correlations". En Thermodynamics and Control of Open Quantum Systems, 306–24. Cambridge University Press, 2021. http://dx.doi.org/10.1017/9781316798454.018.
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Nolè, Gabriele, Rosa Lasaponara, Antonio Lanorte y Beniamino Murgante. "Quantifying Urban Sprawl With Spatial Autocorrelation Techniques Using Multi-Temporal Satellite Data". En Geospatial Intelligence, 1624–44. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8054-6.ch072.
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This study deals with the use of satellite TM multi-temporal data coupled with statistical analyses to quantitatively estimate urban expansion and soil consumption for small towns in southern Italy. The investigated area is close to Bari and was selected because highly representative for Italian urban areas. To cope with the fact that small changes have to be captured and extracted from TM multi-temporal data sets, we adopted the use of spectral indices to emphasize occurring changes, and geospatial data analysis to reveal spatial patterns. Analyses have been carried out using global and local spatial autocorrelation, applied to multi-date NASA Landsat images acquired in 1999 and 2009 and available free of charge. Moreover, in this paper each step of data processing has been carried out using free or open source software tools, such as, operating system (Linux Ubuntu), GIS software (GRASS GIS and Quantum GIS) and software for statistical analysis of data (R). This aspect is very important, since it puts no limits and allows everybody to carry out spatial analyses on remote sensing data. This approach can be very useful to assess and map land cover change and soil degradation, even for small urbanized areas, as in the case of Italy, where recently an increasing number of devastating flash floods have been recorded. These events have been mainly linked to urban expansion and soil consumption and have caused loss of human lives along with enormous damages to urban settlements, bridges, roads, agricultural activities, etc. In these cases, remote sensing can provide reliable operational low cost tools to assess, quantify and map risk areas.
Actas de conferencias sobre el tema "Open quantum system, quantum thermodynamics, quantum sensing"
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Thomas, Benjamin P., Roman Basistyy, Adrien P. Genoud, Adrian Diaz Fortich y Fred Moshary. "Active standoff mixing-ratio measurements of N2O from topographic targets using an open-path quantum cascade laser system". En Lidar Remote Sensing for Environmental Monitoring XVI, editado por Nobuo Sugimoto y Upendra N. Singh. SPIE, 2018. http://dx.doi.org/10.1117/12.2323548.
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Castillo, Paulo, Adrian Diaz, Benjamin Thomas, Barry Gross y Fred Moshary. "Open-path quantum cascade laser-based system for simultaneous remote sensing of methane, nitrous oxide, and water vapor using chirped-pulse differential optical absorption spectroscopy". En SPIE Remote Sensing, editado por Adolfo Comerón, Evgueni I. Kassianov y Klaus Schäfer. SPIE, 2015. http://dx.doi.org/10.1117/12.2195169.
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