Results 1 to 10 of about 1,094 (53)
Gain and Loss in Quantum Cascade Lasers [PDF]
, 2001 We report gain calculations for a quantum cascade laser using a fully self-consistent quantum mechanical approach based on the theory of nonequilibrium Green functions. Both the absolute value of the gain as well as the spectral position at threshold are
A. Wacker +13 more
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Focus on nonequilibrium fluctuation relations: from classical to quantum
New Journal of Physics, 2015 The fluctuation dissipation theorem is at the heart of equilibrium statistical mechanics. For a system away from thermal equilibrium, generalized nonequilibrium fluctuation relations have been found in recent years.
Dario Bercioux +3 more
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Bosonic thermoelectric transport and breakdown of universality
New Journal of Physics, 2014 We discuss the general principles of transport in normal phase atomic gases, comparing Bose and Fermi systems. Our study shows that two-dimensional bosonic transport is non-universal with respect to different dissipation mechanisms.
A Rançon, Cheng Chin, K Levin
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Phonon-induced dynamic resonance energy transfer
New Journal of Physics, 2014 In a network of interacting quantum systems, achieving fast coherent energy transfer is a challenging task. While quantum systems are susceptible to a wide range of environmental factors, in many physical settings their interactions with quantized ...
James Lim +4 more
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Decoherence models for discrete-time quantum walks and their application to neutral atom experiments
New Journal of Physics, 2014 We discuss decoherence in discrete-time quantum walks in terms of a phenomenological model that distinguishes spin and spatial decoherence. We identify the dominating mechanisms that affect quantum-walk experiments realized with neutral atoms walking in ...
Andrea Alberti +3 more
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A quantitative theory of coherent delocalization
New Journal of Physics, 2014 We define a quantitative measure of coherent delocalization; similarly to the concept of entanglement measures, we require that a measure of coherent delocalization may never increase under processes that do not create coherent superpositions.
Federico Levi, Florian Mintert
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Laser-induced quantum pumping in graphene [PDF]
, 2012 We investigate non-adiabatic electron pumping in graphene generated by laser irradiation with linear polarization parallel or perpendicular to the transport direction.
Kohler, Sigmund +3 more
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Universally optimal noisy quantum walks on complex networks
New Journal of Physics, 2014 Transport properties play a crucial role in several fields of science, for example biology, chemistry, sociology, information science and physics. The behavior of many dynamical processes running over complex networks is known to be closely related to ...
Filippo Caruso
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Centrosymmetry enhances quantum transport in disordered molecular networks
New Journal of Physics, 2014 For more than 50 years we have known that photosynthetic systems harvest solar energy with almost unit quantum efficiency . However, recent experimental evidence of quantum coherence during the excitonic energy transport in photosynthetic organisms ...
Tobias Zech +3 more
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Non-equilibrium quantum dynamics with collisional correlations
New Journal of Physics, 2014 We present a fully quantum mechanical treatment of collisional correlations beyond mean-field dynamics. Correlations are handled by an ensemble of mean-field states emerging from a stochastic propagation scheme. This is done by first propagating two-body
E Suraud, P-G Reinhard
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