Description:
Quantum communication and quantum computation are two of the most important areas within the rapidly expanding and highly competitive field of quantum information science. They attract wide interest from physicists in many different subject areas because of their potential both for producing genuine quantum technologies and for providing a context for exploring many fundamental aspects of physics itself, such as entanglement and information capacity.
FEATURES AND BENEFITS
A system and method for the controlled generation, manipulation, and conversion of individual photons in and for a quantum computing environment or a quantum communication environment are provided. Systems and methods for:
• doubling a single photon in a first propagation mode into two new photons in one or two new propagation modes
• combining two photons in one or two propagation modes into a single photon of a single propagation mode
• implementing a pi phase shift on a two-photon state but not on the one-photon state in a fully controlled, consistent, and repeatable fashion
• a source of individual photons having clearly defined and fully controllable properties
• Chi3- (χ3)-based process allows for three-wave mixing process where all photons are close to the same frequency.
Embodiments of the above allow for generation and conversion operations that are up to 100% efficient.
Generation, conversion, combination, and phase shifting operations are preferably carried out inside a non-linear χ3 material of a predetermined length.
Example scheme for implementing 100%-efficient cascaded photon doubling.
APPLICATIONS
• Quantum computers
• Bright scalable multiphoton and entangled photon pair sources
• High efficiency single-photon detectors
• Deterministic detectors and n-photon controlled-photon entangling gates
• Error-correction encoders
• Cryptography and games,
• Secret sharing and voting
• Imaging systems
• Teleportation
• Secure communication
• Deterministic bell-state analysis
• Enhanced optical recording with multiphoton states