Universal decoherence induced by an environmental quantum phase transition

Decoherence induced by coupling a system with an environment may display universal features. We demonstrate that when the coupling to the system drives a quantum phase transition in the environment, the decay of quantum coherences in the system is Gaussian with a width independent of the system-envi...

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Detalles Bibliográficos
Autor principal: Paz, Juan Pablo
Publicado: 2007
Materias:
Algorithms
Computer simulation
Gaussian beams
Mathematical models
Numerical analysis
Phase transitions
Coupling strength
Quantum phase transition
Universal decoherence
Quantum theory
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v75_n3_p_Cucchietti
http://hdl.handle.net/20.500.12110/paper_10502947_v75_n3_p_Cucchietti
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_10502947_v75_n3_p_Cucchietti
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spelling paper:paper_10502947_v75_n3_p_Cucchietti2023-06-08T16:02:25Z Universal decoherence induced by an environmental quantum phase transition Paz, Juan Pablo Algorithms Computer simulation Gaussian beams Mathematical models Numerical analysis Phase transitions Coupling strength Quantum phase transition Universal decoherence Quantum theory Decoherence induced by coupling a system with an environment may display universal features. We demonstrate that when the coupling to the system drives a quantum phase transition in the environment, the decay of quantum coherences in the system is Gaussian with a width independent of the system-environment coupling strength. We obtain analytical results for a class of solvable models, and present numerical evidence supporting the validity of our results in more general cases. This effect opens the way for a quantum simulation algorithm, where a single qubit is used to detect a quantum phase transition. We discuss possible implementations of such an algorithm and relate our results to available data on universal decoherence in NMR echo experiments. © 2007 The American Physical Society. Fil:Paz, J.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v75_n3_p_Cucchietti http://hdl.handle.net/20.500.12110/paper_10502947_v75_n3_p_Cucchietti
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Algorithms
Computer simulation
Gaussian beams
Mathematical models
Numerical analysis
Phase transitions
Coupling strength
Quantum phase transition
Universal decoherence
Quantum theory
spellingShingle Algorithms
Computer simulation
Gaussian beams
Mathematical models
Numerical analysis
Phase transitions
Coupling strength
Quantum phase transition
Universal decoherence
Quantum theory
Paz, Juan Pablo
Universal decoherence induced by an environmental quantum phase transition
topic_facet Algorithms
Computer simulation
Gaussian beams
Mathematical models
Numerical analysis
Phase transitions
Coupling strength
Quantum phase transition
Universal decoherence
Quantum theory
description Decoherence induced by coupling a system with an environment may display universal features. We demonstrate that when the coupling to the system drives a quantum phase transition in the environment, the decay of quantum coherences in the system is Gaussian with a width independent of the system-environment coupling strength. We obtain analytical results for a class of solvable models, and present numerical evidence supporting the validity of our results in more general cases. This effect opens the way for a quantum simulation algorithm, where a single qubit is used to detect a quantum phase transition. We discuss possible implementations of such an algorithm and relate our results to available data on universal decoherence in NMR echo experiments. © 2007 The American Physical Society.
author Paz, Juan Pablo
author_facet Paz, Juan Pablo
author_sort Paz, Juan Pablo
title Universal decoherence induced by an environmental quantum phase transition
title_short Universal decoherence induced by an environmental quantum phase transition
title_full Universal decoherence induced by an environmental quantum phase transition
title_fullStr Universal decoherence induced by an environmental quantum phase transition
title_full_unstemmed Universal decoherence induced by an environmental quantum phase transition
title_sort universal decoherence induced by an environmental quantum phase transition
publishDate 2007
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v75_n3_p_Cucchietti
http://hdl.handle.net/20.500.12110/paper_10502947_v75_n3_p_Cucchietti
work_keys_str_mv AT pazjuanpablo universaldecoherenceinducedbyanenvironmentalquantumphasetransition
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