# Experimental Proof of Quantum Nonlocality without Squeezing

J. Niset, A. Acin, U. L. Andersen, N. J. Cerf, R. García-Patrón, M. Navascues, M. Sabuncu

Research output: Contribution to journalArticle (Academic Journal)peer-review

## Abstract

It is shown that the ensemble $\{p (\alpha),|\alpha>|\alpha^*>\}$ where $p (\alpha)$ is a Gaussian distribution of finite variance and $| \alpha>$ is a coherent state can be better discriminated with an entangled measurement than with any local strategy supplemented by classical communication. Although this ensemble consists of products of quasi-classical states, it exhibits some quantum nonlocality. This remarkable effect is demonstrated experimentally by implementing the optimal local strategy together with a joint nonlocal strategy that yields a higher fidelity.
Original language Undefined/Unknown Physical Review Letters Published - 28 Aug 2006

### Bibliographical note

4 pages, 2 figures

• quant-ph