Noise and decoherence in quantum two-level systems

Simple item page
dc.creatorShnirman, Alexander
dc.creatorMakhlin, Yuriy
dc.creatorSchön, Gerd
dc.date2002-02-28
dc.date.accessioned2026-07-07T02:44:34Z
dc.date.available2026-07-07T02:44:34Z
dc.descriptionMotivated by recent experiments with Josephson-junction circuits we reconsider decoherence effects in quantum two-level systems (TLS). On one hand, the experiments demonstrate the importance of 1/f noise, on the other hand, by operating at symmetry points one can suppress noise effects in linear order. We, therefore, analyze noise sources with a variety of power spectra, with linear or quadratic coupling, which are longitudinal or transverse relative to the eigenbasis of the unperturbed Hamiltonian. To evaluate the dephasing time for transverse 1/f noise second-order contributions have to be taken into account. Manipulations of the quantum state of the TLS define characteristic time scales. We discuss the consequences for relaxation and dephasing processes.
dc.descriptionTo appear in Proceedings of the Nobel Jubilee Symposium on Condensation and Coherence in Condensed Systems (Physica Scripta)
dc.identifierhttps://arxiv.org/abs/cond-mat/0202518
dc.identifierhttp://arxiv.org/abs/cond-mat/0202518
dc.identifierPhysica Scripta T102, 147-154 (2002)
dc.identifierdoi:10.1238/Physica.Topical.102a00147
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/18974
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.subjectQuantum Physics
dc.titleNoise and decoherence in quantum two-level systems
dc.typetext

Files

Collections

arXiv