Hi all,

Next week, our visitor, Joel Huber, will talk about “Generalising Quantum Dynamics under Operational Constraints”. See below for the abstract.

The talk will take place on Tuesday in HIT E41.1 at 11:15.

Best, Ladina

***** Title: Generalising Quantum Dynamics under Operational Constraints

Abstract: In this talk, we explore generalised phase space theories, focusing on deviations from standard quantum time evolution. In the phase space formulation, quantum dynamics is governed by the Moyal bracket. We consider generalisations thereof and impose operational conditions — such as probability positivity — to characterise consistent dynamics. We show how (generalised) quantum dynamics impacts the momentum and position distributions in the presence of a cubic potential, and argue that this effect is experimentally accessible. The consistency of a proposed evolution depends critically on both the bracket structure and the underlying state space. We analyse scenarios where the state space contains Gaussian states or the first excited state of the harmonic oscillator. In the latter case, phase space dynamics is strongly constrained and quantum dynamics is found to be the only consistent time-reversible evolution, at least to the order that can be probed in a cubic potential.