Multi-target-qubit unconventional geometric phase gate in a multi-cavity system

Cavity-based large scale quantum information processing (QIP) may involve multiple cavities and require performing various quantum logic operations on qubits distributed in different cavities. Geometric-phase-based quantum computing has drawn much attention recently, which offers advantages against...

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Bibliographic Details
Published in:Scientific reports 2016-02, Vol.6 (1), p.21562-21562, Article 21562
Main Authors: Liu, Tong, Cao, Xiao-Zhi, Su, Qi-Ping, Xiong, Shao-Jie, Yang, Chui-Ping
Format: Article
Language:English
Subjects:
639/766/483/1139
639/766/483/481
Cavities
Humanities and Social Sciences
Information processing
multidisciplinary
Quantum dots
Quantum theory
Science
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Summary:Cavity-based large scale quantum information processing (QIP) may involve multiple cavities and require performing various quantum logic operations on qubits distributed in different cavities. Geometric-phase-based quantum computing has drawn much attention recently, which offers advantages against inaccuracies and local fluctuations. In addition, multiqubit gates are particularly appealing and play important roles in QIP. We here present a simple and efficient scheme for realizing a multi-target-qubit unconventional geometric phase gate in a multi-cavity system. This multiqubit phase gate has a common control qubit but different target qubits distributed in different cavities, which can be achieved using a single-step operation. The gate operation time is independent of the number of qubits and only two levels for each qubit are needed. This multiqubit gate is generic, e.g., by performing single-qubit operations, it can be converted into two types of significant multi-target-qubit phase gates useful in QIP. The proposal is quite general, which can be used to accomplish the same task for a general type of qubits such as atoms, NV centers, quantum dots and superconducting qubits.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep21562