Transition probability generating function of a transitionless quantum parametric oscillator

Hiroaki Mishima and Yuki Izumida
Phys. Rev. E 96, 012133 – Published 17 July 2017

Abstract

The transitionless tracking (TT) algorithm enables the exact tracking of quantum adiabatic dynamics in an arbitrary short time by adding a counterdiabatic Hamiltonian to the original adiabatic Hamiltonian. By applying Husimi's method originally developed for a quantum parametric oscillator (QPO) to the transitionless QPO achieved using the TT algorithm, we obtain the transition probability generating function with a time-dependent parameter constituted with solutions of the corresponding classical parametric oscillator (CPO). By obtaining the explicit solutions of this CPO using the phase-amplitude method, we find that the time-dependent parameter can be reduced to the frequency ratio between the Hamiltonians without and with the counterdiabatic Hamiltonian, from which we can easily characterize the result achieved by the TT algorithm. We illustrate our theory by showing the trajectories of the CPO on the classical phase space, which elucidate the effect of the counterdiabatic Hamiltonian of the QPO.

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  • Received 10 March 2017

DOI:https://doi.org/10.1103/PhysRevE.96.012133

©2017 American Physical Society

Physics Subject Headings (PhySH)

Statistical Physics & Thermodynamics

Authors & Affiliations

Hiroaki Mishima* and Yuki Izumida

  • Department of Complex Systems Science, Graduate School of Information Science, Nagoya University, Nagoya 464-8601, Japan

  • *mishima.hiroaki@j.mbox.nagoya-u.ac.jp
  • Present address: Department of Complex Systems Science, Graduate School of Informatics, Nagoya University, Nagoya 464-8601, Japan; izumida@i.nagoya-u.ac.jp

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Vol. 96, Iss. 1 — July 2017

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