A quantum phase switch between a single solid-state spin and a photon

Sun, Shuo; Kim, Hyochul; Solomon, Glenn S.; Waks, Edo

doi:10.1038/nnano.2015.334

Cited by 151 publications

(138 citation statements)

References 53 publications

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“…[22][23][24][25] Emitters coupled to cavities can also serve as highly nonlinear devices operating at low photon numbers, 26 as well as efficient interfaces between photons and solid-state quantum memory. 27,28 The majority of the work to-date focused on a single emitter in a cavity, which can exhibit nearly perfect single photon purity and indistinguishability using resonant pumping techniques. [14][15][16][17] Two-photon interference has been demonstrated from two cavity-coupled emitters on different chips contained in separate cryostats.…”

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confidence: 99%

Two-Photon Interference from the Far-Field Emission of Chip-Integrated Cavity-Coupled Emitters

et al. 2016

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ABSTRACT. Interactions between solid-state quantum emitters and cavities are important for a broad range of applications in quantum communication, linear optical quantum computing, nonlinear photonics, and photonic quantum simulation. These applications often require combining many devices on a single chip with identical emission wavelengths in order to generate two-photon interference, the primary mechanism for achieving effective photon-photon interactions. Such integration remains extremely challenging due to inhomogeneous broadening and fabrication errors that randomize the resonant frequencies of both the emitters and cavities. In this letter we demonstrate two-photon interference from independent cavity-coupled emitters on the same chip, providing a potential solution to this long-standing problem. We overcome spectral mismatch between different cavities due to fabrication errors by depositing and locally evaporating a thin layer of condensed nitrogen. We integrate optical heaters to tune individual dots within each cavity to the same resonance with better than 3 µeV of precision. Combining these tuning methods, we demonstrate two-photon interference between two devices spaced by less than 15 µm on the same chip with a post-selected visibility of 33%. These results pave the way to integrate multiple quantum light sources on the same chip to develop quantum photonic devices.

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Two-Photon Interference from the Far-Field Emission of Chip-Integrated Cavity-Coupled Emitters

et al. 2016

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“…In the state-of-the-art pillar microcavities [33,61], g/(2κ + κ s ) = 2.4 is achievable for In(Ga)As QDs and is used for judging the device performance in this work. Significant progress has been achieved towards the practical implementation of the proposed photon-spin entangling gate, e.g., the demonstration of a photon sorter [62], a quantum switch [63], Faraday rotation of 6…”

Section: Linear Gcb For Robust Quantum Gatementioning

confidence: 99%

Spin-based single-photon transistor, dynamic random access memory, diodes, and routers in semiconductors

Hu¹

2016

Phys. Rev. B

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The realization of quantum computers and quantum Internet requires not only quantum gates and quantum memories, but also transistors at single-photon levels to control the flow of information encoded on single photons. Single-photon transistor (SPT) is an optical transistor in the quantum limit, which uses a single photon to open or block a photonic channel. In sharp contrast to all previous SPT proposals which are based on single-photon nonlinearities, here I present a novel design for a high-gain and high-speed (up to THz) SPT based on a linear optical effect -giant circular birefringence (GCB) induced by a single spin in a double-sided optical microcavity. A gate photon sets the spin state via projective measurement and controls the light propagation in the optical channel. This spin-cavity transistor can be directly configured as diodes, routers, DRAM units, switches, modulators, etc. Due to the duality as quantum gate and transistor, the spin-cavity unit provides a solid-state platform ideal for future Internet -a mixture of all-optical Internet with quantum Internet.

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“…The parameter τ characterizes the pulse duration, and represents the half-width of the pulse at 1/e of the maximum. We set g V /2π = 11 GHz, κ/2π = 25 GHz, which are achievable in a quantum dot -cavity quantum electrodynamics system [83], and γ/2π = 0.15 GHz [83]. These parameters achieve the optimal cooperativity in the monochromatic limit for B = 9 T.…”

Section: Analysis Of Entanglement Fidelitymentioning

confidence: 99%

Nanophotonic Quantum Interface for a Single Solid-state Spin

Sun

Kim

Solomon

et al. 2016

Conference on Lasers and Electro-Optics

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The 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.

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A quantum phase switch between a single solid-state spin and a photon

Cited by 151 publications

References 53 publications

Two-Photon Interference from the Far-Field Emission of Chip-Integrated Cavity-Coupled Emitters

Two-Photon Interference from the Far-Field Emission of Chip-Integrated Cavity-Coupled Emitters

Spin-based single-photon transistor, dynamic random access memory, diodes, and routers in semiconductors

Nanophotonic Quantum Interface for a Single Solid-state Spin

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