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• W2808162409 abstract "We present a way to realize a multiplex-controlled phase gate of n-1 control qubits simultaneously controlling one target qubit, with n qubits distributed in n different cavities. This multiqubit gate is implemented by using n qutrits (three-level natural or artificial atoms) placed in n different cavities, which are coupled to an auxiliary qutrit. Here, the two logic states of a qubit are represented by the two lowest levels of a qutrit placed in a cavity. We show that this n-qubit controlled phase gate can be realized using only 2n+2 basic operations, i.e., the number of required basic operations only increases linearly with the number n of qubits. Since each basic operation employs the qutrit-cavity or qutrit-pulse resonant interaction, the gate can be fast implemented when the number of qubits is not large. Numerical simulations show that a three-qubit controlled phase gate, which is executed on three qubits distributed in three different cavities, can be high-fidelity implemented by using a circuit QED system. This proposal is quite general and can be applied to a wide range of physical systems, with atoms, NV centers, quantum dots, or various superconducting qutrits distributed in different cavities. Finally, this method can be applied to implement a multiqubit controlled phase gate with atoms using a cavity. A detailed discussion on implementing a three-qubit controlled phase gate with atoms and one cavity is presented." @default.
• W2808162409 created "2018-06-21" @default.
• W2808162409 creator A5028614792 @default.
• W2808162409 creator A5050888507 @default.
• W2808162409 creator A5061297737 @default.
• W2808162409 date "2018-06-25" @default.
• W2808162409 modified "2023-10-16" @default.
• W2808162409 title "Multiplex-controlled phase gate with qubits distributed in a multicavity system" @default.
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• W2808162409 doi "https://doi.org/10.1103/physreva.97.062336" @default.
• W2808162409 hasPublicationYear "2018" @default.
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