Matches in SemOpenAlex for { <https://semopenalex.org/work/W14407425> ?p ?o ?g. }
Showing items 1 to 89 of
89
with 100 items per page.
- W14407425 abstract "We examine the effect of multilevels on decoherence and dephasing properties of a quantum system consisting of a non-ideal two level subspace, identified as the qubit and a finite set of higher energy levels above this qubit subspace. The whole system is under interaction with an environmental bath through a Caldeira-Leggett type coupling. The model interaction we use can generate nonnegligible couplings between the qubit states and the higher levels upto $Nsim 10$. In contrast to the pure two-level system, in a multilevel system the quantum information may leak out of the qubit subspace through nonresonant as well as resonant excitations induced by the environment. The decoherence properties of the qubit subspace is examined numerically using the master equation formalism of the system's reduced density matrix. We numerically examine the relaxation and dephasing times as the environmental frequency spectrum, the environmental temperature, and the multilevel system parameters are varied. We observe the influence of all energy scales in the noise spectrum on the short time dynamics implying the dominance of nonresonant transitions at short times. The relaxation and dephasing times calculated, strongly depend on $N$ for $4< N<10$ and saturate for $10 <N$. We also examine double degenerate systems with $4 le N$ and observe a strong suppression (almost by two orders of magnitude) of the low temperature relaxation and dephasing rates. An important observation for $4 le N$ in doubly degenerate energy configuration is that, we find a strong suppression of the RD rates for such systems relative to the singly degenerate ones. These results are also compared qualitatively with the relaxation rates found from the Fermi Golden Rule." @default.
- W14407425 created "2016-06-24" @default.
- W14407425 creator A5008203786 @default.
- W14407425 creator A5037458807 @default.
- W14407425 date "2003-11-06" @default.
- W14407425 modified "2023-10-18" @default.
- W14407425 title "Decoherence and dephasing in multilevel systems interacting with thermal environment" @default.
- W14407425 hasPublicationYear "2003" @default.
- W14407425 type Work @default.
- W14407425 sameAs 14407425 @default.
- W14407425 citedByCount "0" @default.
- W14407425 crossrefType "posted-content" @default.
- W14407425 hasAuthorship W14407425A5008203786 @default.
- W14407425 hasAuthorship W14407425A5037458807 @default.
- W14407425 hasConcept C109546105 @default.
- W14407425 hasConcept C121332964 @default.
- W14407425 hasConcept C121864883 @default.
- W14407425 hasConcept C122527463 @default.
- W14407425 hasConcept C128805008 @default.
- W14407425 hasConcept C134306372 @default.
- W14407425 hasConcept C15744967 @default.
- W14407425 hasConcept C191608238 @default.
- W14407425 hasConcept C203087015 @default.
- W14407425 hasConcept C204530211 @default.
- W14407425 hasConcept C2776029896 @default.
- W14407425 hasConcept C2778926657 @default.
- W14407425 hasConcept C32834561 @default.
- W14407425 hasConcept C33923547 @default.
- W14407425 hasConcept C49023278 @default.
- W14407425 hasConcept C51003876 @default.
- W14407425 hasConcept C56911000 @default.
- W14407425 hasConcept C62520636 @default.
- W14407425 hasConcept C72319582 @default.
- W14407425 hasConcept C73214911 @default.
- W14407425 hasConcept C77805123 @default.
- W14407425 hasConcept C84114770 @default.
- W14407425 hasConcept C85608146 @default.
- W14407425 hasConcept C97355855 @default.
- W14407425 hasConceptScore W14407425C109546105 @default.
- W14407425 hasConceptScore W14407425C121332964 @default.
- W14407425 hasConceptScore W14407425C121864883 @default.
- W14407425 hasConceptScore W14407425C122527463 @default.
- W14407425 hasConceptScore W14407425C128805008 @default.
- W14407425 hasConceptScore W14407425C134306372 @default.
- W14407425 hasConceptScore W14407425C15744967 @default.
- W14407425 hasConceptScore W14407425C191608238 @default.
- W14407425 hasConceptScore W14407425C203087015 @default.
- W14407425 hasConceptScore W14407425C204530211 @default.
- W14407425 hasConceptScore W14407425C2776029896 @default.
- W14407425 hasConceptScore W14407425C2778926657 @default.
- W14407425 hasConceptScore W14407425C32834561 @default.
- W14407425 hasConceptScore W14407425C33923547 @default.
- W14407425 hasConceptScore W14407425C49023278 @default.
- W14407425 hasConceptScore W14407425C51003876 @default.
- W14407425 hasConceptScore W14407425C56911000 @default.
- W14407425 hasConceptScore W14407425C62520636 @default.
- W14407425 hasConceptScore W14407425C72319582 @default.
- W14407425 hasConceptScore W14407425C73214911 @default.
- W14407425 hasConceptScore W14407425C77805123 @default.
- W14407425 hasConceptScore W14407425C84114770 @default.
- W14407425 hasConceptScore W14407425C85608146 @default.
- W14407425 hasConceptScore W14407425C97355855 @default.
- W14407425 hasLocation W144074251 @default.
- W14407425 hasOpenAccess W14407425 @default.
- W14407425 hasPrimaryLocation W144074251 @default.
- W14407425 hasRelatedWork W1627434555 @default.
- W14407425 hasRelatedWork W1808653996 @default.
- W14407425 hasRelatedWork W1976441389 @default.
- W14407425 hasRelatedWork W1977501810 @default.
- W14407425 hasRelatedWork W1994590859 @default.
- W14407425 hasRelatedWork W2001923620 @default.
- W14407425 hasRelatedWork W2010589267 @default.
- W14407425 hasRelatedWork W2017045486 @default.
- W14407425 hasRelatedWork W2044998769 @default.
- W14407425 hasRelatedWork W2076296882 @default.
- W14407425 hasRelatedWork W2079196712 @default.
- W14407425 hasRelatedWork W2086005563 @default.
- W14407425 hasRelatedWork W2097505317 @default.
- W14407425 hasRelatedWork W2223561339 @default.
- W14407425 hasRelatedWork W2314246247 @default.
- W14407425 hasRelatedWork W2883453787 @default.
- W14407425 hasRelatedWork W2952723158 @default.
- W14407425 hasRelatedWork W3041500165 @default.
- W14407425 hasRelatedWork W3099430359 @default.
- W14407425 hasRelatedWork W1972243942 @default.
- W14407425 isParatext "false" @default.
- W14407425 isRetracted "false" @default.
- W14407425 magId "14407425" @default.
- W14407425 workType "article" @default.