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Mostrando ítems 1-10 de 2088
Thermal baths as quantum resources: More friends than foes?
(IOP Publishing, 2015-11-06)
In this article we argue that thermal reservoirs (baths) are potentially useful resources in processes involving atoms interacting with quantized electromagnetic fields and their applications to quantum technologies. One ...
Selective and efficient quantum state tomography and its application to quantum process tomography
(American Physical Society, 2013-01-18)
We present a method for quantum state tomography that enables the efficient estimation, with fixed precision, of any of the matrix elements of the density matrix of a state, provided that the states from the basis in which ...
Efficiency fluctuations in a quantum battery charged by a repeated interaction process
(MDPI, 2022)
A repeated interaction process assisted by auxiliary thermal systems charges a quantum battery. The charging energy is supplied by switching on and off the interaction between the battery and the thermal systems. The charged ...
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 ...
Testing the Efficiency of Digital Simulation of Quantum Walks on IBM’s Q platform - towards quantum experimental algorithms
This thesis presents several quantum circuit implementations of discrete and continuous quantum walks in cycle graphs. Quantum walks have become an important tool for developing quantum algorithms, that is why this work ...
Optimal control of a charge qubit in a double quantum dot with a Coulomb impurity
(Elsevier Science, 2017-02)
We study the efficiency of modulated external electric pulses to produce efficient and fast charge localization transitions in a two-electron double quantum dot. We use a configuration interaction method to calculate the ...
Optimal quantum control applied to quantum dots
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Física - PPGFCâmpus São Carlos, 2019-10-03)
In the present study, we review the one-qubit dynamics and we offer a new unifying interpretation of the Landau-Zenner and the Rabi dynamics, by indicating the physical elements responsible for the manifestation of one ...
Quantum efficiencies in a multi-annular photocatalytic reactor
(IWA Publishing, 2007-12)
Radiative energy efficiencies of a multi-annular photocatalytic reactor were evaluated and analysed. The total quantum efficiency, defined as the ratio of the number of molecules of the pollutant reacted to the number of ...
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, ...
Experimental characterization of quantum processes: a selective and efficient method in arbitrary finite dimensions
(American Physical Society, 2021-05)
The temporal evolution of a quantum system can be characterized by quantum process tomography, a complex task that consumes a number of physical resources scaling exponentially with the number of subsystems. An alternative ...