The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 2009
Filed:
May. 21, 2004
Ralph S. Conti, Ypsilanti, MI (US);
Kenneth A. Augustyn, Plymouth, MI (US);
Keith Kastella, Gregory, MI (US);
Ralph S. Conti, Ypsilanti, MI (US);
Kenneth A. Augustyn, Plymouth, MI (US);
Keith Kastella, Gregory, MI (US);
General Dynamics Advanced Information Systems, Inc., Arlington, VA (US);
Abstract
A system and method of detecting entangled photon pairs, each pair including a signal photon and an idler photon, is disclosed. Entangled photon pairs are provided having an entanglement time and an entanglement area selected to substantially increase an associated entangled two-photon cross-section of an associated target medium. The entangled photon pairs are also selected to have an energy distribution between the signal photon and the idler photon to substantially decrease an associated random two-photon absorption cross section of the target medium. The entangled photon pairs are directed to the target medium, and at least one entangled-photon pair being absorbed by the target medium is detected. The techniques for detecting entangled photons may be adapted to accommodate hiding information in entangled photons. That is, these techniques may be used for quantum steganography.