Decoherence induced by a dynamic spin environment: The universal regime

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This paper analyzes the decoherence induced on a single qubit by the interaction with a spin chain with nontrivial internal dynamics (XY -type interactions). The aim of the paper is to study the existence and properties of the so-called universal regime, in which the decoherence time scale becomes i...

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Detalles Bibliográficos
Autor principal: Cormick, María Cecilia
Otros Autores: Pablo Paz, J.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2008
Acceso en línea:Registro en Scopus
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Aporte de:Registro referencial: Solicitar el recurso aquí
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100 1 |a Cormick, María Cecilia 
245 1 0 |a Decoherence induced by a dynamic spin environment: The universal regime 
260 |c 2008 
270 1 0 |m Cormick, C.; Departamento de Física, FCEyN, Ciudad Universitaria Pabellón 1, 1428 Buenos Aires, Argentina 
504 |a Cucchietti, F.M., Fernandez-Vidal, S., Paz, J.P., (2007) Phys. Rev. A, 75, p. 032337. , PLRAAN 1050-2947 10.1103/PhysRevA.75.032337 
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504 |a Lidar, D.A., Chuang, I.L., Whaley, K.B., (1998) Phys. Rev. Lett., 81, p. 2594. , PRLTAO 0031-9007 10.1103/PhysRevLett.81.2594 
504 |a Zurek, W.H., Cucchietti, F.M., Paz, J.P., (2007) Acta Phys. Pol. B, 38, p. 1685. , APOBBB 0587-4254 
504 |a Tessieri, L., Wilkie, J., (2003) J. Phys. A, 36, p. 12305. , JPHAC5 0305-4470 10.1088/0305-4470/36/49/012 
504 |a Cucchietti, F.M., Paz, J.P., Zurek, W.H., (2005) Phys. Rev. A, 72, p. 052113. , PLRAAN 1050-2947 10.1103/PhysRevA.72.052113 
504 |a Quan, H.T., Song, Z., Liu, X.F., Zanardi, P., Sun, C.P., (2006) Phys. Rev. Lett., 96, p. 140604. , PRLTAO 0031-9007 10.1103/PhysRevLett.96.140604 
504 |a Rossini, D., Calarco, T., Giovannetti, V., Montangero, S., Fazio, R., (2007) Phys. Rev. A, 75, p. 032333. , PLRAAN 1050-2947 10.1103/PhysRevA.75.032333 
504 |a Jing, J., Lu, Z.-G., arXiv:quant-ph/0612115; Pineda, C., Seligman, T.H., (2006) Phys. Rev. A, 73, p. 012305. , PLRAAN 1050-2947 10.1103/PhysRevA.73.012305 
504 |a Yuan, S., Katsnelson, M.I., De Raedt, H., arXiv:0707.2372; De Raedt, H., Dobrovitski, V.V., (2004) Computer Simulation Studies in Condensed-Matter Physics XVI, , edited by D. P. Landau et al. Springer Proceedings in Physics (Springer, Berlin 
504 |a Dobrovitski, V.V., De Raedt, H.A., Katsnelson, M.I., Harmon, B.N., (2003) Phys. Rev. Lett., 90, p. 210401. , PRLTAO 0031-9007 10.1103/PhysRevLett.90.210401 
504 |a Ermann, L., Paz, J.P., Saraceno, M., (2006) Phys. Rev. A, 73, p. 012302. , PLRAAN 1050-2947 10.1103/PhysRevA.73.012302 
504 |a Blume-Kohout, R., Zurek, W., (2003) Phys. Rev. A, 68, p. 032104. , PLRAAN 1050-2947 10.1103/PhysRevA.68.032104 
504 |a Levstein, P.R., Usaj, G., Pastawski, H.M., (1998) J. Chem. Phys., 108, p. 2718. , JCPSA6 0021-9606 10.1063/1.475664 
504 |a Lieb, E., Schultz, T., Mattis, D., (1961) Ann. Phys. (N.Y.), 16, p. 407. , APNYA6 0003-4916 10.1016/0003-4916(61)90115-4 
504 |a Yuan, Z.-G., Zhang, P., Li, S.-S., arXiv:0707.2846; Pfeuty, P., (1979) Phys. Lett., 72, p. 245. , PYLAAG 0375-9601 10.1016/0375-9601(79)90017-3 
506 |2 openaire  |e Política editorial 
520 3 |a This paper analyzes the decoherence induced on a single qubit by the interaction with a spin chain with nontrivial internal dynamics (XY -type interactions). The aim of the paper is to study the existence and properties of the so-called universal regime, in which the decoherence time scale becomes independent of the strength of the coupling with the environment. It is shown that, although such a regime does exist, as previously established by Cucchietti [Phys. Rev. A 75, 032337 (2007)], it is not a clear signature of a quantum phase transition in the environment. In fact, this kind of universality also exists in the absence of quantum phase transitions. A universal regime can be related to the existence of an energy scale separation between the Hamiltonian of the environment and the one characterizing the system-environment interaction. The results presented also indicate that in the strong-coupling regime the quantum phase transition does not produce an enhancement of decoherence (as opposed to what happens in the weak-coupling regime). © 2008 The American Physical Society.  |l eng 
593 |a Departamento de Física, FCEyN, Ciudad Universitaria Pabellón 1, 1428 Buenos Aires, Argentina 
690 1 0 |a HAMILTONIANS 
690 1 0 |a MAGNETIC COUPLINGS 
690 1 0 |a MOLECULAR INTERACTIONS 
690 1 0 |a PHASE SEPARATION 
690 1 0 |a PHASE TRANSITIONS 
690 1 0 |a SPIN DYNAMICS 
690 1 0 |a DECOHERENCE 
690 1 0 |a ENERGY SCALE SEPARATION 
690 1 0 |a QUANTUM PHASE TRANSITION 
690 1 0 |a SPIN CHAINS 
690 1 0 |a QUANTUM THEORY 
700 1 |a Pablo Paz, J. 
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