We’re very excited to share our latest work that was recently published in Nature Physics! Here we program optical circuits in a disordered medium by employing the disorder itself. We use these optical circuits to manipulate, and efficiently measure, high-dimensional entangled qudits.
A complex medium consists of millions of unitary operations within itself. Our method very carefully directs light through any combination of these operations, effectively programming a new arbitrary operation. This allows us to perform any set of quantum gates on high-dimensional states of light, including the ones necessary for entanglement certification and efficient quantum measurement.
This paper is very dense in terms of the variety of techniques involved in the theoretical formulation, experiment, simulations, data analysis, and computation, and most importantly, error analysis. This work was done along our collaborators Armin Tavakoli, Claudio Conti, and Pepijn Pinkse.
You can read the open access paper by following this link 10.1038/s41567-023-02319-6 . The codes and dataset used for the simulations in the paper are available on Github.
BBQ Lab 