Relaxation in a Completely Integrable Many-Body Quantum System: AnAb InitioStudy of the Dynamics of the Highly Excited States of 1D Lattice Hard-Core Bosons

AbstractExciton polaron is a hypothetical many-body quasiparticle that involves an exciton dressed with a polarized electron-hole cloud in the Fermi sea. It has been evoked to explain the excitonic spectra of charged monolayer transition metal dichalcogenides, but the studies were limited to the ground state. Here we measure the reflection and photoluminescence of monolayer MoSe2 and WSe2 gating devices encapsulated by boron nitride. We observe gate-tunable exciton polarons associated with the 1 s–3 s exciton Rydberg states. The ground and excited exciton polarons exhibit comparable energy redshift (15~30 meV) from their respective bare excitons. The robust excited states contradict the trion picture because the trions are expected to dissociate in the excited states. When the Fermi sea expands, we observe increasingly severe suppression and steep energy shift from low to high exciton-polaron Rydberg states. Their gate-dependent energy shifts go beyond the trion description but match our exciton-polaron theory. Our experiment and theory demonstrate the exciton-polaron nature of both the ground and excited excitonic states in charged monolayer MoSe2 and WSe2.

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USE OF THE WHIRLIGIG PRINCIPLE FOR STABILIZING THE INITIAL STATES OF SOME CLASSIC AND QUANTUM SYSTEMS

10.46813/2020-129-078 ◽

2020 ◽

pp. 78-81

Author(s):

V.A. Buts

Keyword(s):

Quantum System ◽

Excited States ◽

Quantum Systems ◽

Nuclear Systems ◽

Initial States

It is shown that the whirligig principle can be used for stabilization of the initial states of some classical and quantum systems. This feature of the whirligig principle is demonstrated by simple examples. The most important result of this work is the proof of the fact that the stabilization of the excited states of quantum systems can be realized by acting not on the quantum system itself, but by acting on the states into which the system must go. Potentially, this result can be used to stabilize excited nuclear systems.

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Charge-Transfer Excited States in Aqueous DNA: Insights from Many-Body Green’s Function Theory

Physical Review Letters ◽

10.1103/physrevlett.112.228301 ◽

2014 ◽

Vol 112 (22) ◽

Cited By ~ 29

Author(s):

Huabing Yin ◽

Yuchen Ma ◽

Jinglin Mu ◽

Chengbu Liu ◽

Michael Rohlfing

Keyword(s):

Charge Transfer ◽

Green’S Function ◽

Excited States ◽

Green's Function ◽

Function Theory ◽

Many Body

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On excited states of the Au3 cluster: an ab initio study

Open Physics ◽

10.2478/s11534-008-0101-6 ◽

2008 ◽

Vol 6 (4) ◽

Cited By ~ 2

Author(s):

Alexander Rusakov ◽

André Zaitsevskii

Keyword(s):

Excited States ◽

Spectroscopic Data ◽

Reasonable Agreement ◽

Dipole Moments ◽

Electronic States ◽

Ab Initio Study ◽

Many Body ◽

Transition Energies ◽

Vertical Transition ◽

Theoretical Results

AbstractExcited electronic states of the Au3 cluster are studied within the shape-consistent small-core relativistic pseudopotential model using many-body multipartitioning perturbation theory. Vertical transition energies and dipole moments are evaluated. For highly symmetric isomer, these theoretical results are in reasonable agreement with spectroscopic data from experiments.

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Publisher’s Note: Relativistic many-body calculations of transition rates from core-excited states in sodiumlike ions [Phys. Rev. A66, 052511 (2002)]

Physical Review A ◽

10.1103/physreva.68.029902 ◽

2003 ◽

Vol 68 (2) ◽

Author(s):

U. I. Safronova ◽

W. R. Johnson ◽

M. S. Safronova ◽

J. R. Albritton

Keyword(s):

Excited States ◽

Transition Rates ◽

Many Body

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Irreversible work versus fidelity susceptibility for infinitesimal quenches

International Journal of Modern Physics B ◽

10.1142/s0217979217500655 ◽

2017 ◽

Vol 31 (06) ◽

pp. 1750065 ◽

Cited By ~ 6

Author(s):

Simone Paganelli ◽

Tony J. G. Apollaro

Keyword(s):

Quantum System ◽

Excited States ◽

Ground State ◽

Finite Size ◽

Scaling Relations ◽

Zero Temperature ◽

Finite Size Scaling ◽

Ising Chain ◽

Extra Term ◽

Explicit Relation

We compare the irreversible work produced in an infinitesimal sudden quench of a quantum system at zero temperature with its ground state fidelity susceptibility, giving an explicit relation between the two quantities. We find that the former is proportional to the latter but for an extra term appearing in the irreversible work which includes also contributions from the excited states. We calculate explicitly the two quantities in the case of the quantum Ising chain, showing that at criticality they exhibit different scaling behaviors. The irreversible work, rescaled by square of the quench’s amplitude, exhibits a divergence slower than that of the fidelity susceptibility. As a consequence, the two quantities obey also different finite-size scaling relations.

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