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Quantum batteries at the verge of a phase transition
(IOP, 2022)
Starting from the observation that the reduced state of a system strongly coupled to a bath is, in general, an athermal state, we introduce and study a cyclic battery-charger quantum device that is in thermal equilibrium, ...
Entanglement oscillations near a quantum critical point
(American Physical Society, 2020-06-11)
Enhanced precision of low-temperature quantum thermometry via dynamical control
(Asociación Física Argentina, 2019)
Precise probing of quantum systems is one of the keys to progress in diverse quantum technologies, includingquantum metrology, quantum information processing and quantum many-body manipulations. We consider athermometer ...
Comment on "modified quantum-speed-limit bounds for open quantum dynamics in quantum channels"
(American Physical Society, 2018-04)
In a recent paper [Phys. Rev. A 95, 052118 (2017)2469-992610.1103/PhysRevA.95.052118], the authors claim that our criticism, in Phys. Rev. A 94, 052125 (2016)2469-992610.1103/PhysRevA.94.052125, to some quantum speed limit ...
Quantum discord and related measures of quantum correlations in finite XY chains
(World Scientific, 2013-05)
We examine the quantum correlations of spin pairs in the ground state of finite XY chains in a transverse field, by evaluating the quantum discord as well as other related entropic measures of quantum correlations. A brief ...
Local approximation to the critical parameters of quantum wells
(Elsevier, 2013-07-12)
We calculate the critical parameters for some simple quantum wells by means of the Riccati–Padé method. The original approach converges reasonably well for nonzero angular-momentum quantum number l but rather too slowly ...
Quantum spherical model with competing interactions
(ELSEVIER SCIENCE BVAMSTERDAM, 2012)
We analyse the phase diagram of a quantum mean spherical model in terms of the temperature T, a quantum parameter g, and the ratio p = -J(2)/J(1) where J(1) > 0 refers to ferromagnetic interactions between first-neighbour ...