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A nonextensive critical phenomenon scenario for quantum entanglement | Constantino Tsallis
; Pedro W. Lamberti
; Domingo Prato
; | Date: |
28 Dec 2000 | Subject: | Statistical Mechanics | cond-mat.stat-mech | Affiliation: | Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil, and Erwin Schroedinger International Institute for Mathematical Physics, Vienna, Austria), Pedro W. Lamberti (FaMAF, Universidad de Cordoba, Argentina) and Domingo Prato (FaMAF, Universida | Abstract: | We discuss the paradigmatic bipartite spin-1/2 system having the probabilities $frac{1+3x}{4}$ of being in the Einstein-Podolsky-Rosen fully entangled state $|Psi^-$$> equiv frac{1}{sqrt 2}(|$$uparrow>_A|$$downarrow>_B$$-|$$downarrow>_A|$$uparrow>_B)$ and $frac{3(1-x)}{4}$ of being orthogonal. This system is known to be separable if and only if $xle1/3$ (Peres criterion). This critical value has been recently recovered by Abe and Rajagopal through the use of the nonextensive entropic form $S_q equiv frac{1- Tr
ho^q}{q-1} (q in cal{R}; $$S_1$$= -$ $Tr$ $
ho ln
ho)$ which has enabled a current generalization of Boltzmann-Gibbs statistical mechanics. This result has been enrichened by Lloyd, Baranger and one of the present authors by proposing a critical-phenomenon-like scenario for quantum entanglement. Here we further illustrate and discuss this scenario through the calculation of some relevant quantities. | Source: | arXiv, cond-mat/0012502 | Services: | Forum | Review | PDF | Favorites |
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