Entanglement and Bell's inequality violation above room temperature in metal carboxylates

Details Entanglement and Bell's inequality violation above room temperature in metal carboxylates Entanglement and Bell's inequality violation above room temperature in metal carboxylates

2009-05-29

arxiv.org/abs/0906.0034v1

Phys. Rev. B 79 054408 (2009)

Physics

Quantum Physics

Scientific paper

In the present work we show that a special family of materials, the metal carboxylates, may have entangled states up to very high temperatures. From magnetic susceptibility measurements, we have estimated the critical temperature below which entanglement exists in the cooper carboxylate \{Cu$_2$(O$_2$CH)$_4$\}\{Cu(O$_2$CH)$_2$(2-methylpyridine)$_2$\}, and we have found this to be above room temperature ($T_e \sim 630$ K). Furthermore, the results show that the system remains maximally entangled until close to $\sim 100$ K and the Bell's inequality is violated up to nearly room temperature ($\sim 290$ K).

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