# Quantum nonlocality of N-qubit W states

## Abstract

An experimental setup for testing quantum nonlocality of N qubits is proposed. This method is a generalization of the optical setup proposed by Banaszek and Wodkiewicz [Phys. Rev. Lett. 82, 2009 (1999)]. The quantum nonlocality of N qubits can be obtained through its violation of N-qubit Bell inequalities. The correlation function measured in the experiment is described by the Wigner function. The effect of inefficient detector is also considered.

- Authors:

- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore)
- Theoretical Physics Division, Chern Institute of Mathematics, Nankai University, Tianjin 300071 (China)
- (Singapore)

- Publication Date:

- OSTI Identifier:
- 20786655

- Resource Type:
- Journal Article

- Resource Relation:
- Journal Name: Physical Review. A; Journal Volume: 73; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevA.73.012310; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS; BELL THEOREM; CORRELATION FUNCTIONS; LOCALITY; OPTICS; QUANTUM COMPUTERS; QUBITS

### Citation Formats

```
Wu Chunfeng, Oh, C. H., Chen Jingling, Kwek, L. C., and Nanyang Technological University, National Institute of Education, 1, Nanyang Walk, Singapore 637616.
```*Quantum nonlocality of N-qubit W states*. United States: N. p., 2006.
Web. doi:10.1103/PHYSREVA.73.0.

```
Wu Chunfeng, Oh, C. H., Chen Jingling, Kwek, L. C., & Nanyang Technological University, National Institute of Education, 1, Nanyang Walk, Singapore 637616.
```*Quantum nonlocality of N-qubit W states*. United States. doi:10.1103/PHYSREVA.73.0.

```
Wu Chunfeng, Oh, C. H., Chen Jingling, Kwek, L. C., and Nanyang Technological University, National Institute of Education, 1, Nanyang Walk, Singapore 637616. Sun .
"Quantum nonlocality of N-qubit W states". United States.
doi:10.1103/PHYSREVA.73.0.
```

```
@article{osti_20786655,
```

title = {Quantum nonlocality of N-qubit W states},

author = {Wu Chunfeng and Oh, C. H. and Chen Jingling and Kwek, L. C. and Nanyang Technological University, National Institute of Education, 1, Nanyang Walk, Singapore 637616},

abstractNote = {An experimental setup for testing quantum nonlocality of N qubits is proposed. This method is a generalization of the optical setup proposed by Banaszek and Wodkiewicz [Phys. Rev. Lett. 82, 2009 (1999)]. The quantum nonlocality of N qubits can be obtained through its violation of N-qubit Bell inequalities. The correlation function measured in the experiment is described by the Wigner function. The effect of inefficient detector is also considered.},

doi = {10.1103/PHYSREVA.73.0},

journal = {Physical Review. A},

number = 1,

volume = 73,

place = {United States},

year = {Sun Jan 15 00:00:00 EST 2006},

month = {Sun Jan 15 00:00:00 EST 2006}

}

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