Beating the Standard Quantum Limit with Four-Entangled Photons
Hokkaido University · University of Bristol · +1 more institution
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.
Citation impact
- FWCI
- 56.16
- Percentile
- 100%
- References
- 29
Authors
5- TNTomohisa Nagata
Hokkaido University, University of Bristol, Japan Science and Technology Agency
- RORyo Okamoto
Hokkaido University, University of Bristol, Japan Science and Technology Agency
- JLJeremy L. O’Brien
Hokkaido University, University of Bristol, Japan Science and Technology Agency
- KSKeiji Sasaki
Hokkaido University, University of Bristol, Japan Science and Technology Agency
- STShigeki TakeuchiCorresponding
Hokkaido University, University of Bristol, Japan Science and Technology Agency
Topics & keywords
- Physics
- Quantum entanglement
- Photon
- Quantum limit
- Quantum sensor
- Photon entanglement
- Measure (data warehouse)
- Limit (mathematics)