University of Cambridge > Talks.cam > AMOP list > Evolution of Gaussian wave packets in the presence of losses and gains

Evolution of Gaussian wave packets in the presence of losses and gains

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact Dr Ulrich Schneider.

In recent years there has been growing interest in open quantum systems described by non-Hermitian Hamiltonians in various fields. Examples are scattering systems and the effective description of absorption and amplification. The classical counterparts of non-Hermitian quantum systems, however, remained illusive. In this talk I present results on the quantum evolution of Gaussian wave packets generated by a non-Hermitian Hamiltonian in the semiclassical limit of small hbar. This yields a generalisation of the Ehrenfest theorem for the dynamics of observable expectation values. The resulting equations of motion for dynamical variables are coupled to an equation of motion for the phase-space metric – a phenomenon having no analogue in Hermitian theories. The insight that can be gained by this classical description will be demonstrated for a number of example systems.

This talk is part of the AMOP list series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

© 2006-2019 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity