154 citations · 391 across the 63 of their papers we have counts for
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An experimental demonstration of single photon nonlocality
Björn Hessmo, Pavel Usachev, Hoshang Heydari +1
In this letter we experimentally implement a single photon Bell test based on the ideas of S. Tan et al. [Phys. Rev. Lett., vol. 66, 252 (1991)] and L. Hardy [Phys. Rev. Lett.,vol.…
A measurable entanglement criterion for two qubits
Hoshang Heydari, Gunnar Björk, Luis Sánchez-Soto
We propose a directly measurable criterion for the entanglement of two qubits. We compare the criterion with other criteria, and we find that for pure states, and some mixed states…
Mutual first order coherence of phase-locked lasers
Hoshang Heydari, Gunnar Björk
We argue that (first-order) coherence is a relative, and not an absolute, property. It is shown how feedforward or feedback can be employed to make two (or more) lasers relatively…