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Selective and efficient quantum process tomography
(American Physical Society, 2009-09)
In this paper we describe in detail and generalize a method for quantum process tomography that was presented by Bendersky [Phys. Rev. Lett. 100, 190403 (2008)]. The method enables the efficient estimation of any element ...
Reconciliation of quantum local master equations with thermodynamics
(IOP Publishing, 2018-11)
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 ...
Parallel Quantum Computation Approach for Quantum Deep Learning and Classical-Quantum Models
(Cartagena de Indias, 2021-12-10)
The paradigm of Quantum computing and artificial intelligence has been growing
steadily in recent years and given the potential of this technology by recognizing the computer
as a physical system that can take advantage ...
Decoherence scaling transition in the dynamics of quantum information scrambling
(American Physical Society, 2021-07)
Reliable processing of quantum information for developing quantum technologies requires precise control of out-of-equilibrium many-body systems. This is a highly challenging task because the fragility of quantum states to ...
Transferência de estado quântico em cadeias de spin
(Universidade Federal do Rio Grande do NorteBrasilUFRNBacharelado em Física, 2017-10-07)
Quantum communication consists in transferring quantum states from one place to another. One of its most well known applications is quantum key distribution, in which a random secret key with security guaranteed by the ...
Quantum state space dimension as a quantum resource
(World Scientific, 2015)
Quantum Discord and Information Deficit in Spin Chains
(Molecular Diversity Preservation International, 2015-03)
We examine the behavior of quantum correlations of spin pairs in a finite anisotropic XY spin chain immersed in a transverse magnetic field, through the analysis of the quantum discord and the conventional and quadratic ...
Period doubling in period-one steady states
(American Physical Society, 2018-02)
Nonlinear classical dissipative systems present a rich phenomenology in their "route to chaos," including period doubling, i.e., the system evolves with a period which is twice that of the driving. However, typically the ...
Time-optimal control fields for quantum systems with multiple avoided crossings
(American Physical Society, 2015-10)
We study time-optimal protocols for controlling quantum systems which show several avoided level crossings in their energy spectrum. The structure of the spectrum allows us to generate a robust guess which is time-optimal ...
Using a quantum work meter to test non-equilibrium fluctuation theorems
(Nature, 2017-12)
Work is an essential concept in classical thermodynamics, and in the quantum regime, where the notion of a trajectory is not available, its definition is not trivial. For driven (but otherwise isolated) quantum systems, ...