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Theory of ground state factorization in quantum cooperative systems (Articolo in rivista)

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Theory of ground state factorization in quantum cooperative systems (Articolo in rivista) (literal)

Anno

Alternative label

Giampaolo, SM; Adesso, G; Illuminati, F (2008)
Theory of ground state factorization in quantum cooperative systems
in Physical review letters (Print)
(literal)

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Rivista

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\"[Giampaolo, Salvatore M.; Adesso, Gerardo; Illuminati, Fabrizio] Univ Salerno, Dipartimento Matemat & Informat, I-84084 Fisciano, SA, Italy; [Giampaolo, Salvatore M.; Adesso, Gerardo; Illuminati, Fabrizio] CNR INFM Coherentia, Naples, Italy; [Giampaolo, Salvatore M.; Adesso, Gerardo; Illuminati, Fabrizio] CNISM, Unita Salerno, Salerno, Italy; [Giampaolo, Salvatore M.; Adesso, Gerardo; Illuminati, Fabrizio] Ist Nazl Fis Nucl, Sez Napoli, Grp Collegato Salerno, Salerno, Italy; [Illuminati, Fabrizio] ISI Fdn Sci Interchange, I-10133 Turin, Italy (literal)

Titolo

Abstract

We introduce a general analytic approach to the study of factorization points and factorized ground states in quantum cooperative systems. The method allows us to determine rigorously the existence, location, and exact form of separable ground states in a large variety of, generally nonexactly solvable, spin models belonging to different universality classes. The theory applies to translationally invariant systems, irrespective of spatial dimensionality, and for spin-spin interactions of arbitrary range. (literal)

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