Chip-scale phonon-based quantum device
| DWPI Title: Chip-scale phonon-based quantum device for quantum information processing, has phononic waveguides that are arranged to provide coupling between different phononic cavities, and between phononic cavities and ultrasonic transducers |
| Abstract: A quantum device includes a phononic crystal defined on a semiconductor substrate. Phononic cavities are defined in the phononic crystal, wherein each phononic cavity contains an implanted acceptor atom. Phononic waveguides are defined in the phononic crystal, wherein each waveguide is coupled to at least one phononic cavity. At least some phononic waveguides are arranged to provide coupling between phononic cavities and ultrasonic transducers. At least some phononic waveguides are arranged to provide coupling between different phononic cavities. |
| Use: Chip-scale phonon-based quantum device for creating and maintaining entangled quantum-mechanical states of atoms or ions for quantum computing and other kinds of quantum information processing. |
| Advantage: The physical system provides for scalable quantum information processing. The significant enhancement of the phonon emission rate is achieved through the purcell effect. The enhanced emission rate due to the Purcell effect is helpful in ensuring that the device can make computations at sufficient speed. Since the acceptors exhibit much weaker substrate spin-coupling, the acceptor-based approach can achieve relatively long coherence times even without isotopic purity. Silicon is especially advantageous because of ease of fabrication and low number of nuclear spins, which leads to favorable decoherence properties. Each phononic waveguide can be brought into resonance and out of resonance by simply touching the waveguide with a micro electro mechanical system (MEMS) cantilever. |
| Novelty: The device has a phononic crystal that is defined on a semiconductor substrate. Multiple phononic cavities (140) are defined in the phononic crystal. Each phononic cavity contains an implanted acceptor atom. Multiple phononic waveguides (145, 150) are defined in the phononic crystal. Each waveguide is coupled to a phononic cavity. Some phononic waveguides are arranged to provide coupling between phononic cavities and ultrasonic transducers and between different phononic cavities. |
| Filed: 3/3/2016 |
| Application Number: US15060434A |
| Tech ID: SD 13079.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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