Quantum dynamics of a polar rotor acted upon by an electric rectangular pulse of variable duration

• URL: http://arxiv.org/abs/2105.00978v1
• Date: Mon, 3 May 2021 16:24:56 GMT
• Title: Quantum dynamics of a polar rotor acted upon by an electric rectangular pulse of variable duration
• Authors: Mallikarjun Karra, Bretislav Friedrich and Burkhard Schmidt
• Abstract summary: kinetic energy imparted to a quantum rotor by a non-resonant electromagnetic pulse with a temporal profile exhibits quasi-periodic drops as a function of the pulse duration. Our analysis reveals that the drops result from the oscillating populations that make up the wavepacket created by the pulse. handy analytic formulae are derived that allow to predict the pulse durations leading to diminished kinetic energy transfer and orientation.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: As demonstrated in our previous work [J. Chem. Phys. 149, 174109 (2018)], the kinetic energy imparted to a quantum rotor by a non-resonant electromagnetic pulse with a Gaussian temporal profile exhibits quasi-periodic drops as a function of the pulse duration. Herein, we show that this behaviour can be reproduced with a simple waveform, namely a rectangular electric pulse of variable duration, and examine, both numerically and analytically, its causes. Our analysis reveals that the drops result from the oscillating populations that make up the wavepacket created by the pulse and that they are necessarily accompanied by drops in the orientation and by a restoration of the pre-pulse alignment of the rotor. Handy analytic formulae are derived that allow to predict the pulse durations leading to diminished kinetic energy transfer and orientation. Experimental scenarios are discussed where the phenomenon could be utilized or be detrimental.

Related papers

• Unveiling the Quantum Toroidal Dipole in Nanosystems: Quantization, Interaction Energy, and Measurement [44.99833362998488]
  We investigate a quantum particle confined to a toroidal surface in the presence of a filiform current along the system's rotational axis. Our analysis reveals that the interaction between the particle and the current induces a non-zero toroidal dipole in the particle's stationary states.
  arXiv  Detail & Related papers  (2024-01-26T13:31:32Z)
• Heat Pulses in Electron Quantum Optics [0.0]
  We formulate a Floquet scattering theory of heat pulses in mesoscopic conductors. The adiabatic emission of heat pulses leads to a heat current that in linear response is given by the thermal conductance quantum. To generate an electric current, we use a Mach--Zehnder interferometer that breaks the electron-hole symmetry and thereby enables a thermoelectric effect.
  arXiv  Detail & Related papers  (2023-11-28T12:46:03Z)
• The electrodynamic origin of the wave-particle duality [0.0]
  A derivation of pilot waves from electrodynamic self-interactions is presented. We abandon the current paradigm that describes electrodynamic bodies as point masses.
  arXiv  Detail & Related papers  (2022-10-14T09:27:47Z)
• Probing dynamics of a two-dimensional dipolar spin ensemble using single qubit sensor [62.997667081978825]
  We experimentally investigate individual spin dynamics in a two-dimensional ensemble of electron spins on the surface of a diamond crystal. We show that this anomalously slow relaxation rate is due to the presence of strong dynamical disorder. Our work paves the way towards microscopic study and control of quantum thermalization in strongly interacting disordered spin ensembles.
  arXiv  Detail & Related papers  (2022-07-21T18:00:17Z)
• Self-oscillating pump in a topological dissipative atom-cavity system [55.41644538483948]
  We report on an emergent mechanism for pumping in a quantum gas coupled to an optical resonator. Due to dissipation, the cavity field evolves between its two quadratures, each corresponding to a different centrosymmetric crystal configuration. This self-oscillation results in a time-periodic potential analogous to that describing the transport of electrons in topological tight-binding models.
  arXiv  Detail & Related papers  (2021-12-21T19:57:30Z)
• Dispersive readout of molecular spin qudits [68.8204255655161]
  We study the physics of a magnetic molecule described by a "giant" spin with multiple $d > 2$ spin states. We derive an expression for the output modes in the dispersive regime of operation. We find that the measurement of the cavity transmission allows to uniquely determine the spin state of the qudits.
  arXiv  Detail & Related papers  (2021-09-29T18:00:09Z)
• Rotating Majorana Zero Modes in a disk geometry [75.34254292381189]
  We study the manipulation of Majorana zero modes in a thin disk made from a $p$-wave superconductor. We analyze the second-order topological corner modes that arise when an in-plane magnetic field is applied. We show that oscillations persist even in the adiabatic phase because of a frequency independent coupling between zero modes and excited states.
  arXiv  Detail & Related papers  (2021-09-08T11:18:50Z)
• Quantum dynamics simulation of intramolecular singlet fission in covalently linked tetracene dimer [0.0]
  We study singlet fission in tetracene para-dimers, covalently linked by a phenyl group. In contrast to most previous works, we account for the full quantum dynamics of the combined excitonic and vibrational system.
  arXiv  Detail & Related papers  (2021-07-29T13:15:24Z)
• Zero-bias current induced by periodic drive of any shape [0.0]
  We investigate time-dependent electron current through a quantum dot under external drive (pulses) We demonstrate that the current, follows a local quench, displays the transient and steady-state behavior, which are described by the same universal function of an external drive.
  arXiv  Detail & Related papers  (2020-06-01T14:43:08Z)
• Relativistic electron spin dynamics in a strong unipolar laser field [0.0]
  We show proportionality between the change of the electron spin projections and the electric field area of the pulse. It is shown that the classical relativistic predictions are accurately reproduced when using the Foldy-Wouthuysen operator.
  arXiv  Detail & Related papers  (2020-05-06T14:10:09Z)
• 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.