skip to main content

Explore Research Products in the NSF-PAR

  • Home
  • Search Results
  • Page 1 of 2

Search for: All records

Creators/Authors contains: "Galperin, Michael"

Note: When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher. Some full text articles may not yet be available without a charge during the embargo (administrative interval).
What is a DOI Number?

Some links on this page may take you to non-federal websites. Their policies may differ from this site.

  1. ; ; ( , The Journal of Chemical Physics)
    The infrared response of a system of two vibrational modes in a cavity is calculated by an effective non-Hermitian Hamiltonian derived by employing the nonequilibrium Green's function (NEGF) formalism. Degeneracies of the Hamiltonian (exceptional points, EPs) widely employed in theoretical analysis of optical cavity spectroscopies are used in an approximate treatment and compared with the full NEGF. Qualitative limitations of the EP treatment are explained by examining the approximations employed in the calculation. 
    more » « less
    Free, publicly-accessible full text available April 21, 2024
  2. ; ( , The Journal of Physical Chemistry C)
    Full Text Available 
  3. ; ; ( , New Journal of Physics)
    Abstract

    We show that an open fermionic system coupled to a continuous environment with unitary system-environment evolution can be exactly mapped onto an auxiliary system consisting of the physical fermion system and a set of discrete fermionic modes subject to non-unitary Lindblad-type system-modes evolution in such a way that reduced dynamics of the fermionic system in the two cases are the same. Conditions for equivalence of reduced dynamics in the two systems are identified and a proof is presented. Our study extends recent work on Bose systems (Tamascelliet al2018Phys. Rev. Lett.120030402) to the case of open quantum Fermi systems and to multi-time correlation functions. Numerical simulations within a generic junction model are presented for illustration.

     
    more » « less
  4. ; ; ( , Physical Review Letters)
  5. ; ; ( , Physical Review B)
  6. ; ( , The Journal of Physical Chemistry Letters)
    Full Text Available 
  7. ; ( , The Journal of Chemical Physics)
  8. ; ; ( , The Journal of Chemical Physics)
  9. ; ; ( , The Journal of Chemical Physics)
  10. ; ; ( , The Journal of Chemical Physics)