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Title: Characteristic footprints of an exceptional point in the dynamics of Li dimer under a laser field

Abstract

Non-hermitian quantum mechanics is a formalism that excels in describing time-dependent states such as resonances. As one, it opens up a window to explore new and undiscovered phenomena. Under this formalism coalescence of two eigenstates and a deficient spectrum are a possible situation. These situations are unique and can occur solely in specific conditions known as Exceptional Points (EPs). An EP holds unique characteristics. One of which is a switch-like behavior: upon adiabatically changing the conditions in a closed loop around the EP, the population of one resonance can be transferred completely to another resonance. The phenomenon was not experimentally observed in an atomic or molecular system so far, although experiments involving nonlinear PT symmetry optics and microwave cavities have already indicated its existence. In this work, we demonstrate and confirm that the switch-like behavior exists in the spectrum of a lithium dimer taking into account both the rotations and the vibrations of the system. Moreover, a footprint of the EP is also shown to exist in the photo-association process of the lithium dimer. In this process, the EP’s resonances serve as the mean to associate two free lithium atoms into a dimer. Based on this, we suggest a correspondingmore » experiment to demonstrate for the first time the EP phenomenon in a molecular system.« less

Authors:
;  [1];  [1];  [1]
  1. Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000 (Israel)
Publication Date:
OSTI Identifier:
22493133
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 143; Journal Issue: 15; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ATOMS; COALESCENCE; DIMERS; EIGENSTATES; LASER RADIATION; LITHIUM; OPTICS; QUANTUM MECHANICS; RESONANCE; ROTATION; SPECTRA; TIME DEPENDENCE

Citation Formats

Haritan, Idan, Amitay, Zohar, Russell-Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 32000, Gilary, Ido, Moiseyev, Nimrod, Russell-Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 32000, and Department of Physics, Technion-Israel Institute of Technology, Haifa 32000. Characteristic footprints of an exceptional point in the dynamics of Li dimer under a laser field. United States: N. p., 2015. Web. doi:10.1063/1.4931774.
Haritan, Idan, Amitay, Zohar, Russell-Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 32000, Gilary, Ido, Moiseyev, Nimrod, Russell-Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 32000, & Department of Physics, Technion-Israel Institute of Technology, Haifa 32000. Characteristic footprints of an exceptional point in the dynamics of Li dimer under a laser field. United States. https://doi.org/10.1063/1.4931774
Haritan, Idan, Amitay, Zohar, Russell-Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 32000, Gilary, Ido, Moiseyev, Nimrod, Russell-Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 32000, and Department of Physics, Technion-Israel Institute of Technology, Haifa 32000. 2015. "Characteristic footprints of an exceptional point in the dynamics of Li dimer under a laser field". United States. https://doi.org/10.1063/1.4931774.
@article{osti_22493133,
title = {Characteristic footprints of an exceptional point in the dynamics of Li dimer under a laser field},
author = {Haritan, Idan and Amitay, Zohar and Russell-Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 32000 and Gilary, Ido and Moiseyev, Nimrod and Russell-Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 32000 and Department of Physics, Technion-Israel Institute of Technology, Haifa 32000},
abstractNote = {Non-hermitian quantum mechanics is a formalism that excels in describing time-dependent states such as resonances. As one, it opens up a window to explore new and undiscovered phenomena. Under this formalism coalescence of two eigenstates and a deficient spectrum are a possible situation. These situations are unique and can occur solely in specific conditions known as Exceptional Points (EPs). An EP holds unique characteristics. One of which is a switch-like behavior: upon adiabatically changing the conditions in a closed loop around the EP, the population of one resonance can be transferred completely to another resonance. The phenomenon was not experimentally observed in an atomic or molecular system so far, although experiments involving nonlinear PT symmetry optics and microwave cavities have already indicated its existence. In this work, we demonstrate and confirm that the switch-like behavior exists in the spectrum of a lithium dimer taking into account both the rotations and the vibrations of the system. Moreover, a footprint of the EP is also shown to exist in the photo-association process of the lithium dimer. In this process, the EP’s resonances serve as the mean to associate two free lithium atoms into a dimer. Based on this, we suggest a corresponding experiment to demonstrate for the first time the EP phenomenon in a molecular system.},
doi = {10.1063/1.4931774},
url = {https://www.osti.gov/biblio/22493133}, journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 15,
volume = 143,
place = {United States},
year = {Wed Oct 21 00:00:00 EDT 2015},
month = {Wed Oct 21 00:00:00 EDT 2015}
}