82 research outputs found
System and method for clock synchronization and position determination using entangled photon pairs
A system and method for clock synchronization and position determination using entangled photon pairs is provided. The present invention relies on the measurement of the second order correlation function of entangled states. Photons from an entangled photon source travel one-way to the clocks to be synchronized. By analyzing photon registration time histories generated at each clock location, the entangled states allow for high accuracy clock synchronization as well as high accuracy position determination
Random Delayed-Choice Quantum Eraser via Two-Photon Imaging
We report on a delayed-choice quantum eraser experiment based on a two-photon
imaging scheme using entangled photon pairs. After the detection of a photon
which passed through a double-slit, a random delayed choice is made to erase or
not erase the which-path information by the measurement of its distant
entangled twin; the particle-like and wave-like behavior of the photon are then
recorded simultaneously and respectively by only one set of joint detection
devices. The present eraser takes advantage of two-photon imaging. The complete
which-path information of a photon is transferred to its distant entangled twin
through a "ghost" image. The choice is made on the Fourier transform plane of
the ghost image between reading "complete information" or "partial information"
of the double-path.Comment: European Physical Journal D (in press
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