Spin squeezing criterion with local unitary invariance

A. R. Usha Devi; Xiaoguang Wang; B. C. Sanders

doi:10.1023/B:QINP.0000004125.12489.f4

Spin squeezing criterion with local unitary invariance

A. R. Usha Devi, Xiaoguang Wang, B. C. Sanders

Research output: Contribution to journal › Article › peer-review

Abstract

We propose a spin squeezing criterion for arbitrary multi-qubit states that is invariant under local unitary operations. We find that, for arbitrary pure two-qubit states, spin squeezing is equivalent to entanglement, and multi-qubit states are entangled if this new spin squeezing parameter is less than unity.

Original language	English
Pages (from-to)	207-219
Number of pages	13
Journal	Quantum information processing
Volume	2
Issue number	3
DOIs	https://doi.org/10.1023/B:QINP.0000004125.12489.f4
Publication status	Published - 2003

Access to Document

10.1023/B:QINP.0000004125.12489.f4

Cite this

@article{7ab9d417c57f4694abbb6bea49369c71,

title = "Spin squeezing criterion with local unitary invariance",

abstract = "We propose a spin squeezing criterion for arbitrary multi-qubit states that is invariant under local unitary operations. We find that, for arbitrary pure two-qubit states, spin squeezing is equivalent to entanglement, and multi-qubit states are entangled if this new spin squeezing parameter is less than unity.",

author = "Devi, {A. R. Usha} and Xiaoguang Wang and Sanders, {B. C.}",

year = "2003",

doi = "10.1023/B:QINP.0000004125.12489.f4",

language = "English",

volume = "2",

pages = "207--219",

journal = "Quantum information processing",

issn = "1573-1332",

publisher = "Kluwer Academic Publishers",

number = "3",

}

TY - JOUR

T1 - Spin squeezing criterion with local unitary invariance

AU - Devi, A. R. Usha

AU - Wang, Xiaoguang

AU - Sanders, B. C.

PY - 2003

Y1 - 2003

N2 - We propose a spin squeezing criterion for arbitrary multi-qubit states that is invariant under local unitary operations. We find that, for arbitrary pure two-qubit states, spin squeezing is equivalent to entanglement, and multi-qubit states are entangled if this new spin squeezing parameter is less than unity.

AB - We propose a spin squeezing criterion for arbitrary multi-qubit states that is invariant under local unitary operations. We find that, for arbitrary pure two-qubit states, spin squeezing is equivalent to entanglement, and multi-qubit states are entangled if this new spin squeezing parameter is less than unity.

U2 - 10.1023/B:QINP.0000004125.12489.f4

DO - 10.1023/B:QINP.0000004125.12489.f4

M3 - Article

SN - 1573-1332

VL - 2

SP - 207

EP - 219

JO - Quantum information processing

JF - Quantum information processing

IS - 3

ER -

Spin squeezing criterion with local unitary invariance

Abstract

Access to Document

Fingerprint

Cite this