Quantum entanglement in nitrosyl iron complexes
- Russian Academy of Sciences, Institute for Problems of Chemical Physics (Russian Federation)
Recent magnetic susceptibility measurements for polycrystalline samples of binuclear nitrosyl iron complexes, [Fe{sub 2}(C{sub 3}H{sub 3}N{sub 2}S){sub 2}(NO){sub 4}] (I) and [Fe{sub 2}(SC{sub 3}H{sub 5}N{sub 2}){sub 2}(NO){sub 4}] (II), suggest that quantum-mechanical entanglement of the spin degrees of freedom exists in these compounds. Entanglement E exists below the temperature T{sub E} that we have estimated for complexes I and II to be 80-90 and 110-120 K, respectively. Using an expression of entanglement in terms of magnetic susceptibility for a Heisenberg dimer, we find the temperature dependence of the entanglement for complex II. Having arisen at the temperature T{sub E}, the entanglement increases monotonically with decreasing temperature and reaches 90-95% in this complex at T = 25 K, when the side effects are still small.
- OSTI ID:
- 21241891
- Journal Information:
- Journal of Experimental and Theoretical Physics, Vol. 107, Issue 5; Other Information: DOI: 10.1134/S1063776108110101; Copyright (c) 2008 Pleiades Publishing, Ltd; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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