Microscopic theory of energy dissipation and decoherence in solid‐state systems: A reformulation of the conventional Markov limit

Tománek, David; Iotti, Rita Claudia; Rossi, Fausto

doi:10.1002/pssb.201147541

Cited by 8 publications

(7 citation statements)

References 19 publications

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“…In addition, the energy-conserving δfunction above is regularized by a Gaussian with a width γ, which corresponds physically to the collision time. In some cases, the results depend on γ and γ → 0 is not the relevant limit 23 . Here, the Lindblad master equation with finite smearing parameters corresponding to the collision time can be regarded as the best Markovian approximation to the exact dynamics 23 .…”

Section: Resultsmentioning

confidence: 99%

“…In some cases, the results depend on γ and γ → 0 is not the relevant limit 23 . Here, the Lindblad master equation with finite smearing parameters corresponding to the collision time can be regarded as the best Markovian approximation to the exact dynamics 23 . In the case of spin relaxation, this is particularly important for systems that exhibit the DP mechanism, as we show below.…”

Section: Resultsmentioning

confidence: 99%

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Spin-phonon relaxation from a universal ab initio density-matrix approach

Habib

Kumar

et al. 2020

Nat Commun

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Designing new quantum materials with long-lived electron spin states urgently requires a general theoretical formalism and computational technique to reliably predict intrinsic spin relaxation times. We present a new, accurate and universal first-principles methodology based on Lindbladian dynamics of density matrices to calculate spin-phonon relaxation time of solids with arbitrary spin mixing and crystal symmetry. This method describes contributions of Elliott-Yafet and D'yakonov-Perel' mechanisms to spin relaxation for systems with and without inversion symmetry on an equal footing. We show that intrinsic spin and momentum relaxation times both decrease with increasing temperature; however, for the D'yakonov-Perel' mechanism, spin relaxation time varies inversely with extrinsic scattering time. We predict large anisotropy of spin lifetime in transition metal dichalcogenides. The excellent agreement with experiments for a broad range of materials underscores the predictive capability of our method for properties critical to quantum information science.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Spin-phonon relaxation from a universal ab initio density-matrix approach

Habib

Kumar

et al. 2020

Nat Commun

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“…Other approaches have been presented, e.g., in Refs. [50,51]. Moreover, for Gaussian dynamics an exact (non-Markovian) closed master equation with time dependent coefficients can be derived [52][53][54].…”

Section: Discussionmentioning

confidence: 99%

A Lindblad Model for Quantum Brownian Motion

Lampo

March

Lewenstein

2019

SpringerBriefs in Physics

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The theory of quantum Brownian motion describes the properties of a large class of open quantum systems. Nonetheless, its description in terms of a Born-Markov master equation, widely used in literature, is known to violate the positivity of the density operator at very low temperatures. We study an extension of existing models, leading to an equation in the Lindblad form, which is free of this problem. We study the dynamics of the model, including the detailed properties of its stationary solution, for both constant and position-dependent coupling of the Brownian particle to the bath, focusing in particular on the correlations and the squeezing of the probability distribution induced by the environment.

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“…Other approaches have been presented, e.g., in Refs. [50,51]. Moreover, for Gaussian dynamics an exact (non-Markovian) closed master equation with time-dependent coefficients can be derived [52][53][54].…”

Section: Discussionmentioning

confidence: 99%

Lindblad model of quantum Brownian motion

et al. 2016

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The theory of quantum Brownian motion describes the properties of a large class of open quantum systems. Nonetheless, its description in terms of a Born-Markov master equation, widely used in the literature, is known to violate the positivity of the density operator at very low temperatures. We study an extension of existing models, leading to an equation in the Lindblad form, which is free of this problem. We study the dynamics of the model, including the detailed properties of its stationary solution, for both constant and position-dependent coupling of the Brownian particle to the bath, focusing in particular on the correlations and the squeezing of the probability distribution induced by the environment.

show abstract

Microscopic theory of energy dissipation and decoherence in solid‐state systems: A reformulation of the conventional Markov limit

Cited by 8 publications

References 19 publications

Spin-phonon relaxation from a universal ab initio density-matrix approach

Spin-phonon relaxation from a universal ab initio density-matrix approach

A Lindblad Model for Quantum Brownian Motion

Lindblad model of quantum Brownian motion

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