Abstract
We present an experimental realization of Hardy’s thought experiment [Phys. Rev. Lett. 68, 2981 (1992)], using photons. The experiment consists of a pair of Mach-Zehnder interferometers that interact through photon bunching at a beam splitter. A striking contradiction is created between the predictions of quantum mechanics and local hidden variables. The contradiction relies on nonmaximally entangled position states of two particles. A Clauser-Horne–type inequality is derived and violated.
- Received 20 October 2004
DOI:https://doi.org/10.1103/PhysRevLett.95.030401
©2005 American Physical Society