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Nanophotonic quantum interface for a single solid-state spin

dc.contributor.advisorWaks, Edoen_US
dc.contributor.authorSun, Shuoen_US
dc.date.accessioned2017-01-25T06:34:46Z
dc.date.available2017-01-25T06:34:46Z
dc.date.issued2016en_US
dc.identifierhttps://doi.org/10.13016/M2CG2N
dc.identifier.urihttp://hdl.handle.net/1903/19057
dc.description.abstractThe ability to store and transmit quantum information plays a central role in virtually all quantum information processing applications. Single spins serve as pristine quantum memories whereas photons are ideal carriers of quantum information. Strong interactions between these two systems provide the necessary interface for developing future quantum networks and distributed quantum computers. They also enable a broad range of critical quantum information functionalities such as entanglement distribution, non-destructive quantum measurements and strong photon-photon interactions. Realizing spin-photon interactions in a solid-state device is particularly desirable because it opens up the possibility of chip-integrated quantum circuits that support gigahertz bandwidth operation. In this thesis, I demonstrate a nanophotonic quantum interface between a single solid-state spin and a photon, and explore its applications in quantum information processing. First, we experimentally realize a spin-photon quantum phase switch based on a strongly coupled quantum dot and photonic crystal cavity system. This device enables coherent light-matter interactions at the fundamental limit, where a single spin controls the polarization of a photon and a single photon flips the spin state. Furthermore, we theoretically propose a way to deterministically generate spin-photon entanglement based on the spin-photon quantum interface, which is an important step towards solid-state implementations of quantum repeaters and quantum networks. Next, we show both theoretically and experimentally, a new method to optically read out a solid-state spin based on the same cavity quantum electrodynamics (QED) system. This new method achieves significant improvement in spin readout fidelity over typical approaches using fluorescence light detection. In the end, we report efforts to realize tunable and robust quantum dot based cavity QED systems. We present a technique for tuning the frequency of a quantum dot that is strongly coupled to a photonic crystal cavity by applying strain. This tuning technique enables us to accurately control the detuning between a quantum dot and a cavity without affecting other emission properties of the dot, which is essential for lots of applications associated with cavity QED systems, including non-classical light generation, photon blockade, single photon level optical switch, and also our major focus, the spin-photon quantum interface.en_US
dc.language.isoenen_US
dc.titleNanophotonic quantum interface for a single solid-state spinen_US
dc.typeDissertationen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentElectrical Engineeringen_US
dc.subject.pqcontrolledQuantum physicsen_US
dc.subject.pqcontrolledOpticsen_US
dc.subject.pqcontrolledCondensed matter physicsen_US
dc.subject.pquncontrolledCavity quantum electrodynamicsen_US
dc.subject.pquncontrolledPhotonic crystalen_US
dc.subject.pquncontrolledQuantum doten_US
dc.subject.pquncontrolledQuantum informationen_US


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