0000000000235103

AUTHOR

Luis L. Sánchez-soto

showing 4 related works from this author

Quantum light depolarization: the phase-space perspective

2008

Quantum light depolarization is handled through a master equation obtained by coupling dispersively the field to a randomly distributed atomic reservoir. This master equation is solved by transforming it into a quasiprobability distribution in phase space and the quasiclassical limit is investigated.

Quasiprobability distributionPhysicsHusimi Q representationQuantum PhysicsLindblad equationWigner quasiprobability distributionQuantum limitFOS: Physical sciencesQUANTUM LIGHT DEPOLARIZATION OPEN QUANTUM SYSTEMAtomic and Molecular Physics and OpticsOpen quantum systemQuantum mechanicsQuantum electrodynamicsPhase spaceMaster equationQuantum Physics (quant-ph)
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Step-by-Step Control of the Dynamics of a Superconducting QED-like System

2007

We discuss the modus operandi of a theoretical scalable coupling scheme to control step by step the time evolution of a pair of flux qubits embedded in a lossy resonant cavity. The sequential interaction of each qubit with the quantized cavity mode is controlled by externally applied magnetic fluxes. Our analysis indicates that indirect qubit-qubit interactions, with the electromagnetic mode acting as a data bus, can be selectively performed and exploited both for the implementation of entangling gates and for the generation of states with a priori known characteristics.

Statistics and ProbabilityCouplingPhysicsSuperconductivityFlux qubitComplex systemTime evolutionStatistical and Nonlinear PhysicsData_CODINGANDINFORMATIONTHEORYQuantum PhysicsLossy compressioncoupling schemeTopologyComputer Science::Emerging TechnologiesControl theoryQubitHardware_ARITHMETICANDLOGICSTRUCTURESMathematical PhysicsSystem busOpen Systems & Information Dynamics
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Robust stationary entanglement of two coupled qubits in independent environments

2009

The dissipative dynamics of two interacting qubits coupled to independent reservoirs at nonzero temperatures is investigated, paying special attention to the entanglement evolution. The counter-rotating terms in the qubit-qubit interaction give rise to stationary entanglement, traceable back to the ground state structure. The robustness of this entanglement against thermal noise is thoroughly analyzed, establishing that it can be detected at reasonable experimental temperatures. Some effects linked to a possible reservoir asymmetry are brought to light.

PhysicsQuantum Physicsmedia_common.quotation_subjectStructure (category theory)FOS: Physical sciencesQuantum entanglementQuantum PhysicsAsymmetryAtomic and Molecular Physics and OpticsRobustness (computer science)QubitStatistical physicsGround stateDissipative dynamicsQuantum Physics (quant-ph)decoerenza dissipazione entanglementmedia_common
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Nonclassical correlations in superconducting circuits

2009

A key step on the road map to solid-state quantum information processing (and to a deeper understanding of many counterintuitive aspects of quantum mechanics) is the generation and manipulation of nonclassical correlations between different quantum systems. Within this framework, we analyze the possibility of generating maximally entangled states in a system of two superconducting flux qubits, as well as the effect of their own environments on the entanglement dynamics. The analysis reported here confirms that the phenomena of sudden birth and sudden death of the entanglement do not depend on the particular measure of the entanglement adopted.

PhysicsQuantum discordQuantum mechanicsQuantum PhysicsQuantum entanglementNonclassical lightW stateQuantum informationCondensed Matter PhysicsSquashed entanglementMultipartite entanglementSudden deathElectronic Optical and Magnetic Materialsphysica status solidi (b)
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