Faculty

Tuesday, June 25, 2019 11:00 am - 11:00 am EDT (GMT -04:00)

Quantum Obvious Transfer using Coherent States

David Reichmuth, Heriot-Watt University

One-out-of-two (1-2) oblivious transfer is a cryptographic primitive, in which a sender holds two bits, x0 and x1, and a receiver receives one of them, in such a way that the receiver does not know both bits, and the sender does not know which bit the receiver obtained. While information-theoretical security for quantum versions of such protocols is not possible, it is of interest to examine possible security bounds, which previous work has shown to be set at 0.749 in “complete” protocols employing pure symmetric states.

Wednesday, June 19, 2019 1:30 pm - 1:30 pm EDT (GMT -04:00)

Nonlocality in quantum kicked top and its connection to symmetric extension

Meenu Kumari

Nonlocality is a useful quantum resource in applications such as quantum key distribution and quantum random number generation. We study nonlocality in a multi-qubit model—quantum kicked top (QKT). This system is of particular interest because it displays regular behavior, bifurcations and chaotic behavior in the classical limit, and is one of the few chaotic systems that has been experimentally realized.