Abstract: The typical approach to transfer quantum information between two superconducting quantum computers is to transduce the quantum information into the optical regime at the first superconducting quantum computer, transmit the quantum information in the optical regime to the second superconducting quantum computer, and then transduce the quantum information back into the microwave regime at the second superconducting quantum computer. However, direct microwave-to-optical and optical-to-microwave transduction have low fidelity due to the low microwave-optical coupling rates and added noise. These problems compound in consecutive microwave-to-optical and optical-to-microwave transduction steps. We break this rate-fidelity trade-off by heralding end-to-end entanglement with one detected photon and teleportation. In contrast to cascaded direct transduction, our technology absorbs the low optical-microwave coupling efficiency into the entanglement heralding step.

Abstract: An all-photonic computational accelerator encodes information in the amplitudes of frequency modes stored in a ring resonator. Nonlinear optical processes enable interaction among these modes. Both the matrix multiplication and element-wise activation functions on these modes (the artificial neurons) occur through coherent processes, enabling the representation of negative and complex numbers without digital electronics. This accelerator has a lower hardware footprint than electronic and optical accelerators, as the matrix multiplication happens in a single multimode resonator on chip. Our architecture provides a unitary, reversible mode of computation, enabling on-chip analog Hamiltonian-echo backpropagation for gradient descent and other self-learning tasks. Moreover, the computational speed increases with the power of the pumps to arbitrarily high rates, as long as the circuitry can sustain the higher optical power.

Abstract: A 1D diamond nanobeam can act as a coherent mechanical interface between spin defect centers in diamond and telecom optical modes. The nanobeam includes embedded mechanical and electric field concentrators with mechanical and optical mode volumes of Vmech/?p3 ˜10?5 and Vopt/?3 ˜10?3, respectively. With a Group IV vacancy in the concentrator, the nanobeam can operate at spin-mechanical coupling rates approaching 40 MHz with high acousto-optical couplings. This nanobeam, used in an entanglement heralding scheme, can provide high-fidelity Bell pairs between quantum repeaters. Using the mechanical interface as an intermediary between the optical and spin subsystems enables addressing the spin defect center with telecom optics, bypassing the native wavelength of the spin. As the spin is never optically excited or addressed, the device can operate at temperatures up to 40 K with no appreciable spectral diffusion, limited by thermal losses.

Abstract: The typical approach to transfer quantum information between two superconducting quantum computers is to transduce the quantum information into the optical regime at the first superconducting quantum computer, transmit the quantum information in the optical regime to the second superconducting quantum computer, and then transduce the quantum information back into the microwave regime at the second superconducting quantum computer. However, direct microwave-to-optical and optical-to-microwave transduction have low fidelity due to the low microwave-optical coupling rates and added noise. These problems compound in consecutive microwave-to-optical and optical-to-microwave transduction steps. We break this rate-fidelity trade-off by heralding end-to-end entanglement with one detected photon and teleportation. In contrast to cascaded direct transduction, our technology absorbs the low optical-microwave coupling efficiency into the entanglement heralding step.

Abstract: A method and system for matching a consumer to a desired product is disclosed. Each of the products is initially described using a defined list of characteristics. Each of the characteristics is defined on a scale, and the consumer provides a value on the scale when describing the desired product. The consumer creates a search by entering values for the characteristics describing the product that are important to that consumer. Each of the entered values in the search is compared against the list defining a particular product. The matching routine ranks each of the products that most closely match the search by the consumer. The search results are further filtered according to the present location of the consumer. The filtered results are presented to the consumer to provide a list of products that best match the desired product and that are located proximate to the consumer.

Abstract: This disclosure is directed to a fiber optic tray assembly. The tray assembly includes a tray having a base portion configured to hold a fiber optic interconnect or splice. An adapter clamp is configured to be mounted to the tray to secure one or more fiber optic adapters to the tray at an angle greater then 0° and less than 90° relative to and substantially parallel to the base portion. A fiber manager is configured to be mounted to one side portion of the tray to secure one or more fiber optic cable leads exiting the tray toward the one side portion of the tray. The tray is approximately one half the height of a standard tray that holds fiber optic cables.

Abstract: A method of operating a mobile telecommunications system having a base station, a plurality of users and a plurality of spectral resource blocks, some of which are not allocated to users. The method includes, (a) for each user, assigning a score to each resource block based on the energy efficiency with which the user can use the resource block, and determining which of the plurality of resource blocks is favored, i.e. has a score indicating that it will be the most energy efficient for the user. For each user, either (b) if the user's favored resource block is not allocated, and is not favored by any other user, that resource block is allocated to that user; or (c) in the event that the same resource block is favored by more than one user, it is allocated to the user who will use it with the greatest energy efficiency.

Abstract: A valve-regulated lead-acid cell utilizes an absorptive glass mat separator having a glass fiber surface which is modified by treatment with at least one particular polymer, as by treatment with a polymer emulsion to coat at least part of the glass fiber surface and then sintering to dry the coating, the polymers including polyolefins, polytetrafluoroethylene, polyvinylchlorides, polyacrylonitriles, polyesters, amphiphilic block and graft copolymers, hydrophilic and amphiphilic nitrogen-containing polymers and polyorgano-silica compounds such as polysilanes and polysiloxanes.