Southwest Quantum Information and Technology

Reproducing stochastic quantum trajectories and applications to quantum feedback control

Presenting Author: Luis Pedro Garcia-Pintos, University of Maryland Joint Quantum Institute
Contributing Author(s): Alexey Gorshkov, Yi-Kai Liu

I show an explicit construction of a Hamiltonian that, given access to a measurement record, reproduces the stochastic trajectories of a continuously monitored quantum system. This provides a tool to engineer quantum control protocols by exploiting measurement feedback. As examples of this, I will show how to emulate the time-reversed dynamics of an open quantum system and a way to prepare a quantum state. Moreover, via suitably chosen feedback Hamiltonians, I show how to mitigate the production of qubit errors with smaller ancilla overheads than traditional quantum error correction techniques if one has access to the environment responsible for the errors.

(Session 9c : Friday from 5:15 pm - 5:45 pm)