Detector Correlations and Null Tests of the Coherent State Hypothesis

TL;DR

This paper explores correlation statistics between two resonant detectors to perform null tests of the coherent state hypothesis, enabling detection of quantum features like squeezing without vacuum noise interference.

Contribution

It introduces a method for null testing of the coherent state hypothesis using detector correlations, avoiding quantum vacuum noise.

Findings

Null tests can verify the coherent state hypothesis.

Detection strategies can reveal squeezing in the radiation field.

Method is free of quantum vacuum noise interference.

Abstract

We discuss the statistics of correlations between two resonant detectors. We show that this allows simple null tests of the coherent state hypothesis, free of vacuum (quantum) noise. Complementary aspects of the radiation field, {\it e.g.}, squeezing in number or phase, can be revealed through appropriate detection strategies.