Phase measurements with weak reference pulses

Abstract

Quantum state discrimination for two coherent states with opposite phases as measured relative to a reference pulse is analyzed as functions of the intensities of both the signal states and of the reference pulse. This problem is relevant for Quantum Key Distribution with phase encoding. We consider both the optimum measurements and simple measurements that require only beamsplitters and photodetectors.

5 pages, 5 figures. I apologize for this boring paper

References in corpus (1)

• The Quantum State of an Ideal Propagating Laser Field

Cited by in corpus (3)

• Testing Quantum Devices: Practical Entanglement Verification in Bipartite Optical Systems
• Binary optical communication in single-mode and entangled quantum noisy channels
• On the Quantum Phase Operator for Coherent States