Artículo
Cucchietti, F.M.; Fernandez-Vidal, S.; Paz, J.P. "Universal decoherence induced by an environmental quantum phase transition" (2007) Physical Review A - Atomic, Molecular, and Optical Physics. 75(3)
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Abstract:
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.
Registro:
| Documento: | Artículo |
| Título: | Universal decoherence induced by an environmental quantum phase transition |
| Autor: | Cucchietti, F.M.; Fernandez-Vidal, S.; Paz, J.P. |
| Filiación: | Theoretical Division, Los Alamos National Laboratory, MS B213, Los Alamos, NM 87545, United States Departamento de Física, Universidad Autonoma de Barcelona, Bellaterra, 87545, Spain Departamento de Física, FCEyN, Ciudad Universitaria, Pabellón 1, 1428 Buenos Aires, Argentina |
| Palabras clave: | Algorithms; Computer simulation; Gaussian beams; Mathematical models; Numerical analysis; Phase transitions; Coupling strength; Quantum phase transition; Universal decoherence; Quantum theory |
| Año: | 2007 |
| Volumen: | 75 |
| Número: | 3 |
| DOI: | http://dx.doi.org/10.1103/PhysRevA.75.032337 |
| Título revista: | Physical Review A - Atomic, Molecular, and Optical Physics |
| Título revista abreviado: | Phys Rev A |
| ISSN: | 10502947 |
| CODEN: | PLRAA |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v75_n3_p_Cucchietti |
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Citas:
---------- APA ----------
Cucchietti, F.M., Fernandez-Vidal, S. & Paz, J.P. (2007) . Universal decoherence induced by an environmental quantum phase transition. Physical Review A - Atomic, Molecular, and Optical Physics, 75(3).http://dx.doi.org/10.1103/PhysRevA.75.032337
---------- CHICAGO ----------
Cucchietti, F.M., Fernandez-Vidal, S., Paz, J.P. "Universal decoherence induced by an environmental quantum phase transition" . Physical Review A - Atomic, Molecular, and Optical Physics 75, no. 3 (2007).http://dx.doi.org/10.1103/PhysRevA.75.032337
---------- MLA ----------
Cucchietti, F.M., Fernandez-Vidal, S., Paz, J.P. "Universal decoherence induced by an environmental quantum phase transition" . Physical Review A - Atomic, Molecular, and Optical Physics, vol. 75, no. 3, 2007.http://dx.doi.org/10.1103/PhysRevA.75.032337
---------- VANCOUVER ----------
Cucchietti, F.M., Fernandez-Vidal, S., Paz, J.P. Universal decoherence induced by an environmental quantum phase transition. Phys Rev A. 2007;75(3).http://dx.doi.org/10.1103/PhysRevA.75.032337
