In this talk I will present the so-called past quantum state, a general technique that helps us determine outcome of measurements at a prior time, t, in the case when a system is being continuously monitored (which is experimentally often the case). As in classical hidden Markov models (and in life), information obtained after a given time, t, contribute to our knowledge about the system at that time. The past quantum state analysis is a quantum version of such a reasoning. As a general technique developed using basic building blocks of quantum measurement theory it can be (and has been) applied to a variety of experimental systems. I will discuss in more detail the application of the method in two example scenarios: (1) electron spin and population dynamics of a quantum dot and (2) quantum teleportation protocol in a cavity/circuit QED setting.


Seminar, April 3, 2017, 12:00. Seminar Room

Hosted by Prof. Darrick Chang