Helstrom Bound for Squeezed Coherent States in Binary Communication

Abstract

In quantum information processing, using a receiver device to differentiate between two non-orthogonal states leads to a quantum error probability. The minimum possible error is known as the Helstrom bound. In this work, we study the conditions for state discrimination using an alphabet of squeezed coherent states and compare them with conditions using the Glauber-Sudarshan, i.e., standard, coherent states.

Keywords

• coherent states
• squeezed states
• Helstrom bound