Communications method and apparatus using quantum entanglement

Patent 7126691 Issued on October 24, 2006. Estimated Expiration Date:

January 6, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Method and apparatus for selectively controlling the quantum state probability distribution of correlated quantum objects Patent #: 6057541
Issued on: 05/02/2000
Inventor: Steenblik

Inventor

Gat, Erann

Application

No. 10336332 filed on 01/06/2003

US Classes:

356/450, BY LIGHT INTERFERENCE (E.G., INTERFEROMETER)398/152, Including polarization398/161, Using delay356/491, Having polarization250/225, Polarizing398/140, TRANSMITTER AND RECEIVER SYSTEM398/214Including optical waveguide

Examiners

Primary: Lauchman, Layla
Assistant: Connolly, Patrick

Attorney, Agent or Firm

Kleinberg & Lerner, LLP

Foreign Patent References

2267622 GB 08/01/1991

International Classes

G01B 9/02
H04B 10/00

Abstract

A method and apparatus for transmitting information using the phenomenon of quantum entanglement. Two streams of quantum-entangled particles are emitted from a source. Performing a measurement on one of the streams results in the observable destruction of interference on the other stream. Information is transmitted by modulating the performance of the measurement on the first stream, and received by observing the presence or absence of interference in the second stream.

Other References

Sergienko et al. “Quantum cryptography using femtosecond-pulsed parametric down-conversion” Phys. Rev. A 60 No. 4, 2622-2625, 1999.
Atatuere, Mete et al. “Complementarity and quantum erasure with entangled-photon states” Phys Rev. A 62, 032106, 2000.
Jennewein, et al. “Quantum cryptography with entangled photons” Physical Review Letters 84 No. 20, 4729-4732, 2000.