Kater Murch (Washington University) | Quanta Seminar

Measurement, information, control, decoherence

In this talk I will discuss some basic ideas in quantum measurement from the perspective of experiments that are readily available today in the circuit quantum electrodynamics architecture. We will focus on a recent experiment where we test an entropic uncertainty relation involving weak and projective measurements. Our story spans some of the oldest ideas in quantum mechanics (uncertainty relations), involves some of the most controversial (weak values), pulls on ideas in information theory (entropies), and will be presented from the humble perspective of an experimentalist trying to make his way through the fascinating world of quantum physics.

[1] https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.100403
(https://arxiv.org/abs/2008.09131)
[2] http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.090403
(https://arxiv.org/abs/1409.0510)
[3] http://www.nature.com/nature/journal/v502/n7470/full/nature12539.html
(https://arxiv.org/abs/1305.7270v1)

Quantum Information Group Website: https://www.qi.phy.cam.ac.uk/