# Quantifying fermionic decoherence in many-body systems.

@article{Kar2017QuantifyingFD, title={Quantifying fermionic decoherence in many-body systems.}, author={Arnab Kar and Ignacio Franco}, journal={The Journal of chemical physics}, year={2017}, volume={146 21}, pages={ 214107 } }

Practical measures of electronic decoherence, called distilled purities, that are applicable to many-body systems are introduced. While usual measures of electronic decoherence such as the purity employ the full N-particle density matrix which is generally unavailable, the distilled purities are based on the r-body reduced density matrices (r-RDMs) which are more accessible quantities. The r-body distilled purities are derivative quantities of the previously introduced r-body reduced purities…

## 7 Citations

Quantifying Early Time Quantum Decoherence Dynamics through Fluctuations.

- Physics, MedicineThe journal of physical chemistry letters
- 2017

A class of mixed quantum-classical schemes for molecular dynamics where the bath is treated classically, such as Ehrenfest dynamics, are shown to correctly capture short-time decoherence when the initial conditions are sampled from the Wigner distribution.

Generalized Theory for the Timescale of Molecular Electronic Decoherence in the Condensed Phase.

- Physics, MedicineThe journal of physical chemistry letters
- 2018

This work introduces a general theory of electronic decoherence for molecules in the condensed phase that captures contributions coming from pure dephasing effects, electronic transitions among diabatic states, and their interference and builds on a widely used model of the photoexcited dynamics of molecules.

Survival of quantum features in the dynamics of a dissipative quantum system and their effect on the state purity.

- MedicinePhysical review. E
- 2021

The state purity of a quantum system is studied with a numerically exact hierarchical equations of motion approach over the wide range of the parameter domain, noting that the state purity does not necessarily reflect any significant information about the persistence of quantum features in the dissipative environment, even when the quantum coherence survives at the steady state.

Electronic interactions do not affect electronic decoherence in the pure-dephasing limit.

- MedicineThe Journal of chemical physics
- 2018

It is shown that varying the electron-electron interactions does not affect the electronic decoherence in the pure-dephasing limit, so the effect of varying the electronic interactions is to rigidly shift in energy the diabatic potential energy surfaces without changing their shape, thus keeping the nuclear dynamics in these surfaces that leads to the electronic Decoder intact.

Symmetry breaking in the Stark Control of Electrons at Interfaces (SCELI).

- Medicine, PhysicsThe Journal of chemical physics
- 2020

It is shown how SCELI can be employed to generate net charge transport in ABA heterojunctions without applying a bias voltage, a phenomenon known as laser-induced symmetry breaking, and exemplify the power of Stark-based strategies for controlling electrons using lasers.

Screening and band bending effects in the Stark control of electrons at interfaces (SCELI)

- Materials Science
- 2021

Recently, we developed a general laser control scheme, i.e., the Stark control of electrons at interfaces (SCELI), based on Stark shifts, that is able to manipulate the electron dynamics at material…

Stark control of electrons across interfaces

- PhysicsPhysical Review B
- 2018

We introduce a laser control scenario to transiently transform an insulating heterojunction into a conducting one on a femtosecond timescale. The scenario is based on opening Landau-Zener quantum…

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