Results 41 to 50 of about 3,578 (70)

Unified Quantum Model of Work Generation in Thermoelectric Generators, Solar and Fuel Cells

open access: yesEntropy, 2016
In the previous papers, the idea of “hidden oscillations” has been applied to explain work generation in semiconductor photovoltaic cells and thermoelectric generators. The aim of this paper is firstly to extend this approach to fuel cells and, secondly,
Robert Alicki
doaj   +1 more source

Geometric effect and gauge field in nonequilibrium quantum thermostatistics

open access: yes, 2005
The concept of work is studied in quantum thermostatistics of a system surrounded by an environment and driven by an external force. It is found that there emerges the gauge theoretical structure in a nonequilibrium process, the field of which is ...
Abe   +11 more
core   +1 more source

Quantifying spatial correlations of general quantum dynamics

open access: yesNew Journal of Physics, 2015
Understanding the role of correlations in quantum systems is both a fundamental challenge as well as of high practical relevance for the control of multi-particle quantum systems.
Ángel Rivas, Markus Müller
doaj   +1 more source

The Wigner-Yanase information can increase under phase sensitive incoherent operations

open access: yes, 2015
We found that the Wigner-Yanase skew information, which has been recently proposed as a measure of coherence in [Phys. Rev. Lett. \textbf{113}, 170401(2014)], can increase under a class of operations which may be interpreted as incoherent following the ...
Bai, Zhaofang, Du, Shuanping
core   +1 more source

Decoherence properties of arbitrarily long histories [PDF]

open access: yes, 2004
Within the decoherent histories formulation of quantum mechanics, we consider arbitrarily long histories constructed from a fixed projective partition of a finite-dimensional Hilbert space.
Scherer, Artur, Soklakov, Andrei N.
core   +2 more sources

An efficient quantum jump method for coherent energy transfer dynamics in photosynthetic systems under the influence of laser fields

open access: yesNew Journal of Physics, 2014
We present a non-Markovian quantum jump (NMQJ) approach for simulating coherent energy transfer dynamics in molecular systems in the presence of laser fields.
Qing Ai   +3 more
doaj   +1 more source

Collective spontaneous emission from pairs of quantum dots: long-range vs. short-range couplings

open access: yes, 2011
We study the spontaneous emission from a coherently delocalized exciton state in a double quantum dot as a function of the distance between the dots, focusing on the similarities and differences between the cases of radiative (long-range, dipole) and ...
Abdussalam, Wildan, Machnikowski, Paweł
core   +1 more source

Currents and fluctuations of quantum heat transport in harmonic chains

open access: yesNew Journal of Physics, 2017
Heat transport in open quantum systems is particularly susceptible to the modeling of system–reservoir interactions. It thus requires us to consistently treat the coupling between a quantum system and its environment.
T Motz, J Ankerhold, J T Stockburger
doaj   +1 more source

A complementary relation between classical bits and randomness in local part in simulating singlet state

open access: yes, 2011
Recently Leggett's proposal of non-local model generates new interest in simulating the statistics of singlet state. Singlet state statistics can be simulated by 1 bit of classical communication without using any further nonlocal correlation.
Ashutosh Rai   +6 more
core   +1 more source

Energy decay and frequency shift of a superconducting qubit from non-equilibrium quasiparticles

open access: yes, 2011
Quasiparticles are an important decoherence mechanism in superconducting qubits, and can be described with a complex admittance that is a generalization of the Mattis-Bardeen theory.
Bialczak, Radoslaw C.   +14 more
core   +1 more source

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