Understanding jumps and spikes in continuous quantum trajectories (A.Tilloy)
- Date: Feb 15, 2016
- Time: 11:30 AM - 01:00 PM (Local Time Germany)
- Speaker: Antoine Tilloy, ENS Paris, France
- Room: Herbert Walther Lecture Hall
- Host: MPQ, Theory Division
On the other hand, it is known since Bohr that a quantum system
subjected to successive von Neumann measurements undergoes rare quantum
jumps. The objective of this talk is to show how this simple jumpy
behavior can be obtained as a Limit of the finer continuous picture and
to unravel a genuinely new phenomenon: quantum spikes. After a short
reminder of continuous measurement theory, I will explain why continuous
quantum trajectories show seemingly discontinuous jumps when the
measurement strength is increased and give an idea of the general proof.
I will then say a few words about Quantum spikes, sharp scale invariant
fluctuations which decorate the jumps even in the infinitely strong
measurement limit and which are simply lost in the von Neumann
approximation.