Quantum Information

Operational effects of the UNOT gate on classical and quantum correlations ( Science Bulletin 63, 12, 765-770)

The discrepancy communicating with parallel versus anti-parallel spins is one of the more surprising phenomena to arise in quantum theory.  That is, if Alice wants to send a direction to Bob. She can either send two spins pointing in this direction or one spin in this direction, while the other pointing in the diametric opposite. ... Read moreOperational effects of the UNOT gate on classical and quantum correlations ( Science Bulletin 63, 12, 765-770)

Practical Unitary Simulator for Non-Markovian Complex Processes (Phys. Rev. Lett. 120, 240502)

We knew that quantum mechanics can make correct future predictions by storing less information about the past, but how can these predictions be systematically generated? This was an important operational question, as we wanted to avoid situations where a quantum model requires only C bits of past information for predict at specific instances during prediction, ... Read morePractical Unitary Simulator for Non-Markovian Complex Processes (Phys. Rev. Lett. 120, 240502)

Optimal Classical Simulation of State-Independent Quantum Contextuality (Phys. Rev. Lett. 120, 130401)

Quantum contextuality describes a form of non-classicality where the output of a quantum measurement C depends on which quantum measure, A or B, were made before -- even when A and B both commute with C and thus should each not disturb the measurement statistics of C. This phenomenon, however, can be replicated by a ... Read moreOptimal Classical Simulation of State-Independent Quantum Contextuality (Phys. Rev. Lett. 120, 130401)