3 papers
quant-ph2021
Explicit asymptotic secret key rate of continuous-variable quantum key distribution with an arbitrary modulation
Aurélie Denys, Peter Brown, Anthony Leverrier
We establish an analytical lower bound on the asymptotic secret key rate of continuous-variable quantum key distribution with an arbitrary modulation of coherent states. Previously…
quant-ph2020
Arbitrarily many independent observers can share the nonlocality of a single maximally entangled qubit pair
Peter J. Brown, Roger Colbeck
Alice and Bob each have half of a pair of entangled qubits. Bob measures his half and then passes his qubit to a second Bob who measures again and so on. The goal is to maximize th…
quant-ph2018
A framework for quantum-secure device-independent randomness expansion
Peter J. Brown, Sammy Ragy, Roger Colbeck
A device-independent randomness expansion protocol aims to take an initial random seed and generate a longer one without relying on details of how the devices operate for security.…