Distinguishability-induced many-body decoherence

Date: Wednesday, September 28, 2022
Time: 12:00
Location: ICTQT
Passcode: 743020

Speaker: Christoph Dittel (University of Freiburg)

Abstract Indistinguishability is the essential ingredient for many-body interference — a purely quantum mechanical interference effect between many identical bosonic or fermionic particles that can be exploited for a variety of applications, ranging from simulations with ultracold atoms to photonic quantum information processing. In this talk I give an introduction into this fascinating many-body property. Starting from its consequences on interference effects, I show how partial particle distinguishability entails a wave-particle duality relation on the many-body level. Moreover, I discuss how partial distinguishability due to mixedness — in the particles’ internal degrees of freedom — induces many-body decoherence whose strength increases exponentially in the number of constituents.