Aspects of quantum coherence in the optical Bloch equations

Sanz, Ángel S.; Han, Heekyung; Brumer, Paul

doi:10.1063/1.2200703

Cited by 10 publications

(5 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Noting this equivalency enables us to recognize that the above observation (increasing ω tends to increase the purity decay rate) is also equivalent to the result of Ref. [25], where aspects of coherence and decoherence were studied with a twolevel system interacting with a decohering environment and a resonant continuous-wave electromagnetic field, that increasing the Rabi frequency increases the decoherence rate.…”

Section: B Tunneling Frequency ω (=δ/ )supporting

confidence: 62%

Distinguishability and chiral stability in solution: Effects of decoherence and intermolecular interactions

Han

Wardlaw

Frolov

2014

The Journal of Chemical Physics

View full text Add to dashboard Cite

We examine the effect of decoherence and intermolecular interactions (chiral discrimination energies) on the chiral stability and the distinguishability of initially pure versus mixed states in an open chiral system. Under a two-level approximation for a system, intermolecular interactions are introduced by a mean-field theory, and interaction between a system and an environment is modeled by a continuous measurement of a population difference between the two chiral states. The resultant equations are explored for various parameters, with emphasis on the combined effects of the initial condition of the system, the chiral discrimination energies, and the decoherence in determining: the distinguishability as measured by a population difference between the initially pure and mixed states, and the decoherence process; the chiral stability as measured by the purity decay; and the stationary state of the system at times long relative to the time scales of the system dynamics and of the environmental effects.

show abstract

Section: B Tunneling Frequency ω (=δ/ )supporting

confidence: 62%

Distinguishability and chiral stability in solution: Effects of decoherence and intermolecular interactions

Han

Wardlaw

Frolov

2014

The Journal of Chemical Physics

View full text Add to dashboard Cite

show abstract

“…Ref. 57 gives the steady-state population for the ideal resonant frequency. However, in a real experiment the detuning ∆ is finite, though small, so here we use the generalized Rabi frequency Ω = √ Ω 2 + ∆ 2 in place of the Rabi frequency,…”

Section: Experimental Results and Analysismentioning

confidence: 99%

Microwave coherent control of ultracold ground-state molecules formed by short-range photoassociation

Gong

et al. 2020

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…or both effects at the same time. 43 In order to determine which one of these possibilities occurs, consider Fig. 6, where the population dynamics associated with the superposition states Ψ 03 (Fig.…”

Section: B Two-state Superposition Dynamicsmentioning

confidence: 99%

Effective Markovian description of decoherence in bound systems

Sanz

2014

Can. J. Chem.

View full text Add to dashboard Cite

Effective descriptions accounting for the evolution of quantum systems that are acted on by a bath are desirable. As the number of bath degrees of freedom increases and full quantum simulations turn out computationally prohibitive, simpler models become essential to understand and gain an insight into the main physical mechanisms involved in the system dynamics. In this regard, vibrational decoherence of an I$_2$ diatomics is tackled here within the framework of Markovian quantum state diffusion. The I$_2$ dynamics are analyzed in terms of an effective decoherence rate, $\Lambda$, and the specific choice of the initial state, in particular, Gaussian wave packets and two-state superpositions. It is found that, for Markovian baths, the relevant quantity regarding decoherence is the product of friction ($\eta$) and temperature ($T$); there is no distinction between varying one or the other. It is also observed that decoherence becomes faster as the energy levels involved in the system state correspond to higher eigenvalues. This effect is due to a population redistribution during the dynamical process and an eventual irreversible loss of the initial coherence. These results have been compared with those available in the literature from more detailed semiclassical IVR simulations, finding a good agreement.Comment: 12 pages, 9 figure

show abstract

Aspects of quantum coherence in the optical Bloch equations

Cited by 10 publications

References 12 publications

Distinguishability and chiral stability in solution: Effects of decoherence and intermolecular interactions

Distinguishability and chiral stability in solution: Effects of decoherence and intermolecular interactions

Microwave coherent control of ultracold ground-state molecules formed by short-range photoassociation

Effective Markovian description of decoherence in bound systems

Contact Info

Product

Resources

About