Strong field effects in the evolution of a two-level system

Феранчук, И. Д.; Leonov, A. V.

doi:10.1016/j.physleta.2010.11.009

Cited by 23 publications

(26 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…is the relaxation coefficient, σ 0 = −γJ 0 (a)/ Γ || in accordance to (16). When the relaxation is ignored ( Γ || = 0), this expression coincides with the one obtained for the strong quantum field [31]. Within the approximation considered here (ω, g ≫ ε), ε does not enter the expressions for the relaxation parameters and the population difference.…”

Section: Averaging Of Rapid Oscillationssupporting

confidence: 78%

Dissipative two-level systems under ultrastrong off-resonant driving

2016

View full text Add to dashboard Cite

We study the dissipative dynamics of a two-level system under ultrastrong driving when the frequency and strength of the exciting field exceed significantly the transition frequency. We find three qualitatively different regimes of such dynamics: 1) the collapse and revival of oscillations in the population difference, 2) the simple exponential decay of the oscillations resulting in their steady state with the finite amplitude, and 3) the steady-state stabilization of the equally populated levels. The nonmonotonic Bessel-function-like dependence on the driving strength is also predicted for the decay rate of these oscillations. The features of this dependence are determined by the relative rates of energetic relaxation and pure dephasing.

show abstract

Section: Averaging Of Rapid Oscillationssupporting

confidence: 78%

Dissipative two-level systems under ultrastrong off-resonant driving

2016

View full text Add to dashboard Cite

show abstract

“…As a result, all values in the Eqns. (12) and (13) depend only on the Rabi frequency (7) which is treated as a constant value and defined via the average photon numbern corresponding to the power W of the driving field pulse and its duration τ as…”

Section: Description Of the Sample Modelmentioning

confidence: 99%

Spontaneous emission in a quantum system driven by a resonant field beyond the rotating wave approximation

Феранчук

Leonau

Eskandari

2017

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

Quasi-stationary states of the quantum system in the driving resonant field are considered without rotating wave approximation. Conditions under which the spontaneous emission could be suppressed in this system are investigated in the special case when the frequency of the driving field is essentially less than the frequency of spontaneous emission. It is shown that the characteristic parameters of the effect are substantially changed in comparison with the results corresponding to RWA. The real physical system for which the considered effects could be observed is described.

show abstract

“…Concluding, the development of the effective numerical and analytical methods for the description of the evolution of the quantum Rabi model that is valid within the whole range of the variation of the parameters is an actual problem. The approximation of the stationary states, which is uniformly convergent to the exact numerical results in the whole range of variation of coupling constants of this model was introduced in references [74,75], while in the work [76] an analogous approach for the description of the quantum evolution operator beyond the rotating wave approximation was presented. This allowed one to provide the theoretical description for the new effects that can appear in the regime ξ 1, i.e.…”

Section: Analysis Of the Quantum Rabi Model Beyond The Rotating mentioning

confidence: 99%

Physical background for parameters of the quantum Rabi model

Феранчук

Leonov

Skoromnik

2016

J. Phys. A: Math. Theor.

View full text Add to dashboard Cite

We investigate the applicability of the two major approximations which are most commonly employed in the study of the quantum Rabi model, namely the description of a resonant cavity mode as a single-mode quantized field and the use of the rotating wave approximation. Starting from the Hamiltonian of a two-level system interacting with a multi-mode quantized field, we perform the canonical transformation of the field operators. This allows one to partition the Hamiltonian of the system into two parts. The first part is the interaction of the two-level system with a single collective field mode, while the second one describes the interaction with field fluctuations. The first part is usually associated with the resonant cavity mode. This division enables us to determine the applicability condition of the single-mode approximation. In addition we identify simple approximate relations for the description of the eigenstates, eigenfunctions and the time evolution of the quantum Rabi model beyond the rotating wave approximation.

show abstract

Strong field effects in the evolution of a two-level system

Cited by 23 publications

References 20 publications

Dissipative two-level systems under ultrastrong off-resonant driving

Dissipative two-level systems under ultrastrong off-resonant driving

Spontaneous emission in a quantum system driven by a resonant field beyond the rotating wave approximation

Physical background for parameters of the quantum Rabi model

Contact Info

Product

Resources

About