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Hybrid quantum computing with conditional beam splitter gate in trapped ion system
Physical Review Letters ( IF 9.227 ) Pub Date : 
H. C. J. Gan, Gleb Maslennikov, Ko-Wei Tseng, Chihuan Nguyen, and Dzmitry Matsukevich

The hybrid approach to quantum computation simultaneously utilizes both discrete and continuous variables which offers the advantage of higher density encoding and processing powers for the same physical resources. Trapped ions, with discrete internal states and motional modes which can be described by continuous variables in an infinite dimensional Hilbert space, offer a natural platform for this approach. A nonlinear gate for universal quantum computing can be implemented with the conditional beam splitter Hamiltonian $\ket{e}\bra{e}(\hat{a}^{\dagger}\hat{b} + \hat{a}\hat{b}^{\dagger})$ that swaps the quantum states of two motional modes, depending on the ion’s internal state. We realize such a gate and demonstrate its applications for quantum state overlap measurements, single-shot parity measurement, and generation of NOON states.
更新日期:2020-03-26

 

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