Nonadiabatic geometric phase for the cyclic evolution of a time-dependent Hamiltonian system

Details Nonadiabatic geometric phase for the cyclic evolution of a time-dependent Hamiltonian system Nonadiabatic geometric phase for the cyclic evolution of a time-dependent Hamiltonian system

1998-06-23

arxiv.org/abs/quant-ph/9806076v1

Physics

Quantum Physics

16 Revtex pages, no figure. Submitted to PRA

Scientific paper

10.1103/PhysRevA.58.3448

The geometric phases of the cyclic states of a generalized harmonic oscillator with nonadiabatic time-periodic parameters are discussed in the framework of squeezed state. It is shown that the cyclic and quasicyclic squeezed states correspond to the periodic and quasiperiodic solutions of an effective Hamiltonian defined on an extended phase space, respectively. The geometric phase of the cyclic squeezed state is found to be a phase-space area swept out by a periodic orbit. Furthermore, a class of cyclic states are expressed as a superposition of an infinte number of squeezed states. Their geometric phases are found to be independent of $\hbar$, and equal to $-(n+1/2)$ times the classical nonadiabatic Hannay angle.

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