Quantum dynamics by the constrained adiabatic trajectory method

Details Quantum dynamics by the constrained adiabatic trajectory method Quantum dynamics by the constrained adiabatic trajectory method

2011-03-18

arxiv.org/abs/1103.3587v1

Phys. Rev. A 83, 032113 (2011)

Physics

Quantum Physics

12 pages

Scientific paper

10.1103/PhysRevA.83.032113

We develop the constrained adiabatic trajectory method (CATM) which allows one to solve the time-dependent Schr\"odinger equation constraining the dynamics to a single Floquet eigenstate, as if it were adiabatic. This constrained Floquet state (CFS) is determined from the Hamiltonian modified by an artificial time-dependent absorbing potential whose forms are derived according to the initial conditions. The main advantage of this technique for practical implementation is that the CFS is easy to determine even for large systems since its corresponding eigenvalue is well isolated from the others through its imaginary part. The properties and limitations of the CATM are explored through simple examples.

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