Quantum particle under dynamical confinement: From quantum Fermi
acceleration to high harmonic generation
- URL: http://arxiv.org/abs/2309.15389v1
- Date: Wed, 27 Sep 2023 03:57:33 GMT
- Title: Quantum particle under dynamical confinement: From quantum Fermi
acceleration to high harmonic generation
- Authors: S. Rakhmanov, C. Trunk and D. Matrasulov
- Abstract summary: Quantum dynamics of a particle confined in a box with time-dependent wall is revisited.
Time-dependence of the average kinetic energy and average quantum force is analyzed.
A model for optical high harmonic generation in the presence of dynamical confinement and external linearly polarized monochromatic field is proposed.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Quantum dynamics of a particle confined in a box with time-dependent wall is
revisited by considering some unexplored aspects of the problem. In particular,
the case of dynamical confinement in a time-dependent box in the presence of
purely time-varying external potential is treated by obtaining exact solution.
Also, some external potentials approving separation of space and time variables
in the Schrodinger equation with time-dependent boundary conditions are
classified. Time-dependence of the average kinetic energy and average quantum
force are analyzed. A model for optical high harmonic generation in the
presence of dynamical confinement and external linearly polarized monochromatic
field is proposed.
Related papers
- Longitudinal Momentum Spectra of pair created in a pulsed field at finite times: Are Oscillations "Real" [0.0]
We analytically compute the probability of $(e+ e-) $pair production in momentum space.
We compare the result with quantum kinetic theory (QKT)
Both approaches allow us to study the particle momentum spectrum at any instant in time.
arXiv Detail & Related papers (2024-05-05T14:28:05Z) - PT-symmetric dynamical confinement: Fermi acceleration, quantum force and Berry phase [0.0]
We consider a quantum particle under the dynamical confinement caused by PT-symmetric box with a moving wall.
The latter is described in terms of the time-dependent Schr"odinger equation obeying the time-dependent PT-symmetric boundary conditions.
arXiv Detail & Related papers (2024-03-27T06:19:35Z) - Dirac particle under dynamical confinement: Fermi acceleration,
trembling motion and quantum force [0.0]
Quantum dynamics of a Dirac particle in a 1D box with moving wall is studied.
Time-dependences of the main characteristics of the dynamical confinement, such as average kinetic energy and quantum force are analyzed.
arXiv Detail & Related papers (2024-01-05T14:43:24Z) - Real-time dynamics of false vacuum decay [49.1574468325115]
We investigate false vacuum decay of a relativistic scalar field in the metastable minimum of an asymmetric double-well potential.
We employ the non-perturbative framework of the two-particle irreducible (2PI) quantum effective action at next-to-leading order in a large-N expansion.
arXiv Detail & Related papers (2023-10-06T12:44:48Z) - Independent-oscillator model and the quantum Langevin equation for an oscillator: A review [19.372542786476803]
A derivation of the quantum Langevin equation is outlined based on the microscopic model of the heat bath.
In the steady state, we analyze the quantum counterpart of energy equipartition theorem.
The free energy, entropy, specific heat, and third law of thermodynamics are discussed for one-dimensional quantum Brownian motion.
arXiv Detail & Related papers (2023-06-05T07:59:35Z) - Quantum dynamics via a hidden Liouville space [0.0]
We introduce a nonstandard iterative technique where time interval is divided into a large number of discrete subintervals with an ultrashort duration.
We choose two-state spin raising and lowering operators for virtual space operators because of their simple algebra.
We implement our technique for an example of a charged particle in both harmonic and anharmonic potentials.
arXiv Detail & Related papers (2023-04-18T20:12:06Z) - Indication of critical scaling in time during the relaxation of an open
quantum system [34.82692226532414]
Phase transitions correspond to the singular behavior of physical systems in response to continuous control parameters like temperature or external fields.
Near continuous phase transitions, associated with the divergence of a correlation length, universal power-law scaling behavior with critical exponents independent of microscopic system details is found.
arXiv Detail & Related papers (2022-08-10T05:59:14Z) - Bound State Formation in Time Dependent Potentials [0.0]
We study the temporal formation of quantum mechanical bound states within a one-dimensional attractive square-well potential.
Our main goal is to study the time scales, in which the bound state is populated and depopulated.
arXiv Detail & Related papers (2022-07-11T14:18:49Z) - Analog cosmological reheating in an ultracold Bose gas [58.720142291102135]
We quantum-simulate the reheating-like dynamics of a generic cosmological single-field model in an ultracold Bose gas.
Expanding spacetime as well as the background oscillating inflaton field are mimicked in the non-relativistic limit.
The proposed experiment has the potential of exploring the evolution up to late times even beyond the weak coupling regime.
arXiv Detail & Related papers (2020-08-05T18:00:26Z) - The role of boundary conditions in quantum computations of scattering
observables [58.720142291102135]
Quantum computing may offer the opportunity to simulate strongly-interacting field theories, such as quantum chromodynamics, with physical time evolution.
As with present-day calculations, quantum computation strategies still require the restriction to a finite system size.
We quantify the volume effects for various $1+1$D Minkowski-signature quantities and show that these can be a significant source of systematic uncertainty.
arXiv Detail & Related papers (2020-07-01T17:43:11Z) - Zitterbewegung and Klein-tunneling phenomena for transient quantum waves [77.34726150561087]
We show that the Zitterbewegung effect manifests itself as a series of quantum beats of the particle density in the long-time limit.
We also find a time-domain where the particle density of the point source is governed by the propagation of a main wavefront.
The relative positions of these wavefronts are used to investigate the time-delay of quantum waves in the Klein-tunneling regime.
arXiv Detail & Related papers (2020-03-09T21:27:02Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.