Beating the Standard Quantum Limit with Four-Entangled Photons
Top Cited Papers
- 4 May 2007
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 316 (5825), 726-729
- https://doi.org/10.1126/science.1138007
Abstract
Precision measurements are important across all fields of science. In particular, optical phase measurements can be used to measure distance, position, displacement, acceleration, and optical path length. Quantum entanglement enables higher precision than would otherwise be possible. We demonstrated an optical phase measurement with an entangled four-photon interference visibility greater than the threshold to beat the standard quantum limit—the limit attainable without entanglement. These results open the way for new high-precision measurement applications.Keywords
Other Versions
This publication has 29 references indexed in Scilit:
- ‘Designer atoms’ for quantum metrologyNature, 2006
- Demonstration of Temporal Distinguishability in a Four-Photon State and a Six-Photon StatePhysical Review Letters, 2006
- Distinguishing four photons in an entangled state from two independent pairs of photonsPhysical Review A, 2005
- Real-Time Quantum Feedback Control of Atomic Spin-SqueezingScience, 2004
- Measurement of the Photonic de Broglie Wavelength of Entangled Photon Pairs Generated by Spontaneous Parametric Down-ConversionPhysical Review Letters, 2002
- de Broglie wavelength reduction for a multiphoton wave packetPhysical Review A, 2002
- Sub-shot-noise interferometric measurements with two-photon statesQuantum and Semiclassical Optics: Journal of the European Optical Society Part B, 1998
- Fundamental quantum limit in precision phase measurementPhysical Review A, 1997
- Photonic de Broglie WavesPhysical Review Letters, 1995
- Two-photon interference in a Mach-Zehnder interferometerPhysical Review Letters, 1990