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Protecting dissipative quantum state preparation via dynamical decoupling
Z. R. Gong, Wang Yao
We show that dissipative quantum state preparation processes can be protected against qubit dephasing by interlacing the state preparation control with dynamical decoupling (DD) co…
Entanglement detection and quantum metrology by Stokes photon diffraction imaging
Hongyi Yu, Wang Yao
We show that far field diffraction image of spontaneously scattered Stokes photons can be used for detection of spin entanglement and for metrology of fields gradients in cold atom…
Generating coherent state of entangled spins
Hongyi Yu, Yu Luo, Wang Yao
A coherent state of many spins contains quantum entanglement which increases with a decrease in the collective spin value. We present a scheme to engineer this class of pure state…
Many-body singlets by dynamic spin polarization
Wang Yao
We show that dynamic spin polarization by collective raising and lowering operators can drive a spin ensemble from arbitrary initial state to many-body singlets, the zero-collectiv…
Quantum computing by optical control of electron spins
Ren-Bao Liu, Wang Yao, L. J. Sham
We review the progress and main challenges in implementing large-scale quantum computing by optical control of electron spins in quantum dots (QDs). Relevant systems include self-a…
Theory of control of spin/photon interface for quantum networks
Wang Yao, Ren-Bao Liu, L. J. Sham
A cavity coupling a charged nanodot and a fiber can act as a quantum interface, through which a stationary spin qubit and a flying photon qubit can be inter-converted via cavity-as…