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- W2891742384 abstract "Although the three-body Rydberg antiblockade regime (RABR) can produce Rabi oscillation between the Rydberg collective excited state and the collective ground state, it is still hard to use the RABR to construct the three-qubit quantum logic gate in one step since the effective Hamiltonian is always accompanied by undesired Stark shifts. In order to overcome this difficulty, an additional laser is introduced to eliminate the Stark shifts in the ground-state subspace. And the initial RABR condition is modified to eliminate the remaining undesired Stark shifts in the collective-excitation subspace. The modified RABR is then generalized to the $n (n>3)$-qubit case. Based on the proposed regime, one-step schemes to construct three- and $n$-qubit quantum controlled-PHASE gates are proposed without the requirement of atomic addressability. The asymmetric Rydberg-Rydberg interaction, which is more practical for Rydberg atoms, is also discussed and proven to be feasible for the modified RABR and quantum controlled-PHASE gate in theory. A full-Hamiltonian-based master equation is used to evaluate the performance and some experimental parameters are also considered." @default.
- W2891742384 created "2018-09-27" @default.
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- W2891742384 date "2018-09-06" @default.
- W2891742384 modified "2023-10-14" @default.
- W2891742384 title "One-step construction of the multiple-qubit Rydberg controlled-phase gate" @default.
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- W2891742384 doi "https://doi.org/10.1103/physreva.98.032306" @default.
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