摘要:
Various embodiments of the present invention are directed to compact systems for generating polarization-entangled photons. In one embodiment of the present invention, a polarization entangled-photon state source comprises a single transmission layer configured for transmitting electromagnetic radiation. The transmission layer includes a beamsplitter and a down-conversion device, both of which are configured to convert a pump beam into first and second signal beams and first and second idler beams. The transmission layer also includes a mode converter configured to invert electric and magnetic field components of both the first signal beam and the first idler beam, and a combiner configured to receive the first and second signal beams and the first and second idler beams and output the first and second signal beams and the first and second idler beams in an entangled polarization states.
摘要:
Various embodiments of the present invention are directed to compact systems for generating polarization-entangled photons. In one embodiment of the present invention, a polarization entangled-photon state source comprises a single transmission layer configured for transmitting electromagnetic radiation. The transmission layer includes a beamsplitter and a down-conversion device, both of which are configured to convert a pump beam into first and second signal beams and first and second idler beams. The transmission layer also includes a mode converter configured to invert electric and magnetic field components of both the first signal beam and the first idler beam, and a combiner configured to receive the first and second signal beams and the first and second idler beams and output the first and second signal beams and the first and second idler beams in an entangled polarization states.
摘要:
Various embodiments of the present invention are directed to color-center-based quantum computer architectures that are both scalable and defect tolerant and to methods for fabricating color-center-based quantum computer architectures. In one embodiment of the present invention, a node of a quantum computer architecture comprises a first photonic device configured to transmit electromagnetic waves, a color center embedded in diamond and coupled to the first photonic device, and a switch located between the first photonic device and a bus waveguide. The switch can be configured to selectively control transmission of electromagnetic waves between the bus waveguide and the color center.
摘要:
A nanoparticle is able to emit single photons. A waveguide is coupled to the nanoparticle and able to receive the single photons. A backreflector is optically coupled to the waveguide and configured to reflect the single photons toward the waveguide.
摘要:
Various embodiments of the present invention are directed to color-center-based quantum computer architectures that are both scalable and defect tolerant and to methods for fabricating color-center-based quantum computer architectures. In one embodiment of the present invention, a node of a quantum computer architecture comprises a first photonic device configured to transmit electromagnetic waves, a color center embedded in diamond and coupled to the first photonic device, and a switch located between the first photonic device and a bus waveguide. The switch can be configured to selectively control transmission of electromagnetic waves between the bus waveguide and the color center.
摘要:
A nanoparticle is able to emit single photons. A waveguide is coupled to the nanoparticle and able to receive the single photons. A backreflector is optically coupled to the waveguide and configured to reflect the single photons toward the waveguide.
摘要:
Various embodiments of the present invention are directed to quantum-dot-based quantum computer architectures that are scalable and defect tolerant and to methods for fabricating quantum dots in quantum computer architectures. In one embodiment of the present invention, a node of quantum computer architecture comprises a first photonic device supported by a substrate. The quantum computer architecture also includes a number of quantum dots coupled to the first photonic device, and a switch supported by the substrate that controls transmission of electromagnetic waves between a bus waveguide and the quantum dots.
摘要:
Various embodiments of the present invention are directed to methods for coupling semiconductor-based photonic devices to diamond. In one embodiment of the present invention, a photonic device is optically coupled with a diamond structure. The photonic device comprises a semiconductor material and is optically coupled with the diamond structure with an adhesive substance that adheres the photonic device to the diamond structure. A method for coupling the photonic device with the diamond structure is also provided. The method comprises: depositing a semiconductor material on the diamond structure; forming the photonic device in the semiconductor material so that the photonic device couples with the diamond structure; and adhering the photonic device to the diamond structure.
摘要:
Various embodiments of the present invention are directed to methods for coupling semiconductor-based photonic devices to diamond. In one embodiment of the present invention, a photonic device is optically coupled with a diamond structure. The photonic device comprises a semiconductor material and is optically coupled with the diamond structure with an adhesive substance that adheres the photonic device to the diamond structure. A method for coupling the photonic device with the diamond structure is also provided. The method comprises: depositing a semiconductor material on the diamond structure; forming the photonic device in the semiconductor material so that the photonic device couples with the diamond structure; and adhering the photonic device to the diamond structure.
摘要:
Various embodiments of the present invention are directed optical-based quantum random number generators. In one embodiment, a quantum random number generator includes an input state generator that generates a first optical quantum system and a second optical quantum system in an entangled state, a detector that measures the state of the first optical quantum system and the state of the second optical quantum system, and a system control that evaluates a result obtained from measuring the state of the first optical quantum system and state of the second optical quantum system to determine whether or not to append a number associated with the result to the sequence of random numbers. The quantum random number generator also include state controllers, located between the input state generator and the detector, that are operationally controlled by the system control to maintain the entangled state, based on results obtained from previous measurements performed on the first and second optical quantum systems.