Violation of Bell’s inequality in a spin 1/2 quantum magnet

Journal Article · Thu Apr 24 00:00:00 EDT 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4873037· OSTI ID:22269368

Chakraborty, Tanmoy; Singh, Harkirat; Mitra, Chiranjib ^[1]

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1. Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur Campus, PO: BCKV Campus Main Office, Mohanpur - 741252, Nadia, West Bengal (India)

Violation of Bell’s inequality test has been established as an efficient tool to determine the presence of entanglement in quantum spin 1/2 magnets. Herein, macroscopic thermodynamic quantities, namely, magnetic susceptibility and specific heat have been employed to perform Bell’s inequality test for [NH{sub 4}CuPO{sub 4}, H{sub 2}O], a spin 1/2 antiferromagnet with nearest neighbor interactions. The mean value of the Bell operator is quantified and plotted as a function of temperature. The threshold temperature is determined above which the Bell’s inequality is not violated and a good consistency is found between the analyses done on magnetic and thermal data.

• OSTI ID: 22269368
• Journal Information: AIP Conference Proceedings, Vol. 1591, Issue 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
INTERACTIONS
MAGNETIC SUSCEPTIBILITY
MAGNETS
SPECIFIC HEAT
SPIN
TEMPERATURE DEPENDENCE
VIOLATIONS