Stable and Unstable Localization in Two-Level Systems Driven by Two Time-Dependent Fields

1994 ◽  
Vol 98 (39) ◽  
pp. 9777-9780 ◽  
Author(s):  
Yuri Dakhnovskii ◽  
Raanan Bavli
Keyword(s):  
Time Dependent ◽  
Two Level Systems

A CLOSED-FORM SOLUTION OF THE EVOLUTION OPERATOR IN TWO-LEVEL SYSTEMS

1994 ◽  
Vol 08 (08n09) ◽  
pp. 505-508 ◽  
Author(s):  
XIAN-GENG ZHAO
Keyword(s):  
Closed Form ◽  
Lie Algebra ◽  
Evolution Operator ◽  
Closed Form Solution ◽  
Form Solution ◽  
Time Dependent ◽  
Arbitrary Time ◽  
Two Level Systems ◽  
Special Case

It is demonstrated by using the technique of Lie algebra SU(2) that the problem of two-level systems described by arbitrary time-dependent Hamiltonians can be solved exactly. A closed-form solution of the evolution operator is presented, from which the results for any special case can be deduced.

scholarly journals Decoherence-free evolution of time-dependent superposition states of two-level systems and thermal effects

2011 ◽  
Vol 84 (1) ◽  
Author(s):  
F. O. Prado ◽  
N. G. de Almeida ◽  
E. I. Duzzioni ◽  
M. H. Y. Moussa ◽  
C. J. Villas-Boas
Keyword(s):  
Thermal Effects ◽  
Time Dependent ◽  
Free Evolution ◽  
Two Level Systems ◽  
Superposition States

scholarly journals Nonzero temperature two-mode squeezing for time-dependent two-level systems

1994 ◽  
Vol 185 (4) ◽  
pp. 355-361 ◽  
Author(s):  
J. Aliaga ◽  
J.L. Gruver ◽  
A.N. Proto ◽  
Hilda A. Cerdeira
Keyword(s):  
Time Dependent ◽  
Nonzero Temperature ◽  
Two Level Systems

scholarly journals Time-Dependent Dephasing and Quantum Transport

Entropy ◽  
2021 ◽  
Vol 23 (9) ◽  
pp. 1179
Author(s):  
Saulo V. Moreira ◽  
Breno Marques ◽  
Fernando L. Semião
Keyword(s):  
Quantum Transport ◽  
General Framework ◽  
Master Equations ◽  
Time Dependent ◽  
Energy Sources ◽  
Symmetric Configuration ◽  
Open Questions ◽  
Two Level Systems ◽  
The Way

The investigation of the phenomenon of dephasing assisted quantum transport, which happens when the presence of dephasing benefits the efficiency of this process, has been mainly focused on Markovian scenarios associated with constant and positive dephasing rates in their respective Lindblad master equations. What happens if we consider a more general framework, where time-dependent dephasing rates are allowed, thereby, permitting the possibility of non-Markovian scenarios? Does dephasing-assisted transport still manifest for non-Markovian dephasing? Here, we address these open questions in a setup of coupled two-level systems. Our results show that the manifestation of non-Markovian dephasing-assisted transport depends on the way in which the incoherent energy sources are locally coupled to the chain. This is illustrated with two different configurations, namely non-symmetric and symmetric. Specifically, we verify that non-Markovian dephasing-assisted transport manifested only in the non-symmetric configuration. This allows us to draw a parallel with the conditions in which time-independent Markovian dephasing-assisted transport manifests. Finally, we find similar results by considering a controllable and experimentally implementable system, which highlights the significance of our findings for quantum technologies.

Aspects of two-level systems under external time-dependent fields

2001 ◽  
Vol 35 (1) ◽  
pp. 175-175
Author(s):  
V G Bagrov ◽  
J C A Barata ◽  
D M Gitman ◽  
W F Wreszinski
Keyword(s):  
Time Dependent ◽  
Two Level Systems ◽  
External Time

scholarly journals Aspects of two-level systems under external time-dependent fields

2001 ◽  
Vol 34 (49) ◽  
pp. 10869-10879 ◽  
Author(s):  
V G Bagrov ◽  
J C A Barata ◽  
D M Gitman ◽  
W F Wreszinski
Keyword(s):  
Time Dependent ◽  
Two Level Systems ◽  
External Time

Time-dependent collisional approximations for two-level systems

1989 ◽  
Vol 39 (11) ◽  
pp. 5705-5716
Author(s):  
M. E. Crenshaw ◽  
C. D. Cantrell
Keyword(s):  
Time Dependent ◽  
Two Level Systems
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