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Multiplex-controlled Phase Gate with Qubits Distributed in a Multi-cavity System by Ye, Biaoliang; Zheng, Zhen-Fei; Yang, Chui-Ping is a scholarly article available to read on EtoBox.

What is Multiplex-controlled Phase Gate with Qubits Distributed in a Multi-cavity System about?

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 distribut

Author

Ye, Biaoliang; Zheng, Zhen-Fei; Yang, Chui-Ping

Published

2018

Language

EN