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Publikováno v:
New J. Phys. 20, 113024 (2018)
The study of open quantum systems often relies on approximate master equations derived under the assumptions of weak coupling to the environment. However when the system is made of several interacting subsystems such a derivation is in many cases ver
Externí odkaz:
http://arxiv.org/abs/1808.10450
Publikováno v:
New J. Phys. 20, 043006 (2018)
First order quantum phase transitions (1QPTs) are signaled, in the thermodynamic limit, by discontinuous changes in the ground state properties. These discontinuities affect expectation values of observables, including spatial correlations. When a 1Q
Externí odkaz:
http://arxiv.org/abs/1708.04912
Publikováno v:
Phys. Rev. A 95, 063615 (2017)
We present an in-depth study of the non-equilibrium statistics of the irreversible work produced during sudden quenches in proximity to the structural linear-zigzag transition of ion Coulomb crystals in 1+1 dimensions. By employing both an analytical
Externí odkaz:
http://arxiv.org/abs/1704.08253
Publikováno v:
Phys. Rev. A 93, 053618 (2016)
We calculate the first two moments and full probability distribution of the work performed on a system of bosonic particles in a two-mode Bose-Hubbard Hamiltonian when the self-interaction term is varied instantaneously or with a finite-time ramp. In
Externí odkaz:
http://arxiv.org/abs/1603.05918
Autor:
Brunelli, M., Fusco, L., Landig, R., Wieczorek, W., Hoelscher-Obermaier, J., Landi, G., Semiao, F. L., Ferraro, A., Kiesel, N., Donner, T., De Chiara, G., Paternostro, M.
Publikováno v:
Phys. Rev. Lett. 121, 160604 (2018)
By making use of a recently proposed framework for the inference of thermodynamic irreversibility in bosonic quantum systems, we experimentally measure and characterize the entropy production rates in the non-equilibrium steady state of two different
Externí odkaz:
http://arxiv.org/abs/1602.06958
Publikováno v:
New Journal of Physics 18, 103015 (2016)
We numerically analyse the behavior of the full distribution of collective observables in quantum spin chains. While most of previous studies of quantum critical phenomena are limited to the first moments, here we demonstrate how quantum fluctuations
Externí odkaz:
http://arxiv.org/abs/1510.05959
Publikováno v:
New J. Phys. 17, 035004 (2015)
We propose a feasible experimental scheme to direct measure heat and work in cold atomic setups. The method is based on a recent proposal which shows that work is a positive operator valued measure (POVM). In the present contribution, we demonstrate
Externí odkaz:
http://arxiv.org/abs/1412.6116
Publikováno v:
New J. Phys. 17, 035016 (2015)
We address the out-of-equilibrium thermodynamics of an isolated quantum system consisting of a cavity optomechanical device. We explore the dynamical response of the system when driven out of equilibrium by a sudden quench of the coupling parameter a
Externí odkaz:
http://arxiv.org/abs/1412.4803
Publikováno v:
Scientific Reports 7, 2355 (2017)
A toolbox for the quantum simulation of polarons in ultracold atoms is presented. Motivated by the impressive experimental advances in the area of ultracold atomic mixtures, we theoretically study the problem of ultracold atomic impurities immersed i
Externí odkaz:
http://arxiv.org/abs/1410.8833