Simultaneous field-free molecular orientation and planar delocalization by THz laser pulses

• URL: http://arxiv.org/abs/2210.13899v1
• Date: Tue, 25 Oct 2022 10:35:21 GMT
• Title: Simultaneous field-free molecular orientation and planar delocalization by THz laser pulses
• Authors: D. Sugny
• Abstract summary: simultaneously orienting a molecule while delocalizing its molecular axis in a plane in field-free conditions. Control strategies using shaped THz laser pulses are proposed to reach such states at zero and nonzero temperatures. The robustness against temperature effects of a simple control procedure combining a laser and a THz pulse is shown.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: This study shows the unexpected and counter-intuitive possibility of simultaneously orienting a molecule while delocalizing its molecular axis in a plane in field-free conditions. The corresponding quantum states are characterized and different control strategies using shaped THz laser pulses are proposed to reach such states at zero and nonzero temperatures. The robustness against temperature effects of a simple control procedure combining a laser and a THz pulse is shown. Such control strategies can be applied not only to linear molecules but also to symmetric top molecules.

Related papers

• Quantum control of ro-vibrational dynamics and application to light-induced molecular chirality [39.58317527488534]
  Achiral molecules can be made temporarily chiral by excitation with electric fields. We go beyond the assumption of molecular orientations to remain fixed during the excitation process.
  arXiv  Detail & Related papers  (2023-10-17T20:33:25Z)
• Dynamics of molecular rotors in bulk superfluid helium [68.8204255655161]
  We report on the experimental study of the laser-induced rotation of helium dimers inside the superfluid $4mathrmHe$ bath at variable temperature. The observed temperature dependence suggests a non-equilibrium evolution of the quantum bath, accompanied by the emission of the wave of second sound.
  arXiv  Detail & Related papers  (2023-04-08T01:22:19Z)
• Quantum Coherent Control of a Single Molecular-Polariton Rotation [2.2482144023488346]
  We present a combined analytical and numerical study for coherent terahertz control of a single molecular polariton. The presence of a cavity strongly modifies the post-pulse orientation of the polariton, making it difficult to obtain its maximal degree of orientation. This work offers a new strategy to study rotational dynamics in the strong-coupling regime and provides a method for complete quantum coherent control of a single molecular polariton.
  arXiv  Detail & Related papers  (2022-12-22T12:37:55Z)
• Field-free molecular alignment by the optimized two-color laser fields [0.0]
  We have investigated the molecular orientation by a asymmetric potential created by the superposition of two-color laser fields. The time-dependent Schrodinger equation is solved numerically for different field parameters.
  arXiv  Detail & Related papers  (2022-12-19T17:06:40Z)
• Bipolar single-molecule electroluminescence and electrofluorochromism [50.591267188664666]
  We investigate cationic and anionic fluorescence of individual zinc phthalocyanine (ZnPc) molecules adsorbed on ultrathin NaCl films on Ag (111) by using STML. They depend on the tip-sample bias polarity and appear at threshold voltages that are correlated with the onset energies of particular molecular orbitals.
  arXiv  Detail & Related papers  (2022-10-20T09:22:45Z)
• Echo-enhanced molecular orientation at high temperatures [4.239093018686964]
  We propose to use the mechanism of the echo phenomenon previously observed in hadron accelerators, free-electron lasers, and laser-excited molecules. A linearly polarized short laser pulse transforms a broad thermal distribution in the molecular rotational phase space into many separated narrow filaments. The overall enhanced orientation of the molecular gas is achieved with some delay, in the course of the echo process.
  arXiv  Detail & Related papers  (2022-07-17T19:50:08Z)
• Optimal control of molecular spin qudits [58.720142291102135]
  We demonstrate, numerically, the possibility of manipulating the spin states of molecular nanomagnets with shaped microwave pulses. The state-to-state or full gate transformations can be performed in this way in shorter times than using simple monochromatic resonant pulses. The application of optimal control techniques can facilitate the implementation of quantum technologies based on molecular spin qudits.
  arXiv  Detail & Related papers  (2021-11-30T11:50:46Z)
• High-resolution 'magic'-field spectroscopy on trapped polyatomic molecules [62.997667081978825]
  Rapid progress in cooling and trapping of molecules has enabled first experiments on high resolution spectroscopy of trapped diatomic molecules. Extending this work to polyatomic molecules provides unique opportunities due to more complex geometries and additional internal degrees of freedom.
  arXiv  Detail & Related papers  (2021-10-21T15:46:17Z)
• Visualizing spinon Fermi surfaces with time-dependent spectroscopy [62.997667081978825]
  We propose applying time-dependent photo-emission spectroscopy, an established tool in solid state systems, in cold atom quantum simulators. We show in exact diagonalization simulations of the one-dimensional $t-J$ model that the spinons start to populate previously unoccupied states in an effective band structure. The dependence of the spectral function on the time after the pump pulse reveals collective interactions among spinons.
  arXiv  Detail & Related papers  (2021-05-27T18:00:02Z)
• Molecular spin qudits for quantum simulation of light-matter interactions [62.223544431366896]
  We show that molecular spin qudits provide an ideal platform to simulate the quantum dynamics of photon fields strongly interacting with matter. The basic unit of the proposed molecular quantum simulator can be realized by a simple dimer of a spin 1/2 and a spin $S$ transition metal ion, solely controlled by microwave pulses.
  arXiv  Detail & Related papers  (2021-03-17T15:03:12Z)
• Long-lasting Molecular Orientation Induced by a Single Terahertz Pulse [4.239093018686964]
  We present a novel, previously unreported phenomenon appearing in thermal ensembles of non-linear polar molecules excited by a single THz pulse. In the case of symmetric-top molecules, the ensemble averaged orientation remains indefinitely constant after the pulse, whereas in the case of asymmetric-top molecules the orientation persists for a long time after the end of the pulse.
  arXiv  Detail & Related papers  (2020-03-03T12:39:26Z)

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.