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Titolo:
Critical behavior of the three-dimensional XY universality class - art. no. 214503
Autore:
Campostrini, M; Hasenbusch, M; Pelissetto, A; Rossi, P; Vicari, E;
Indirizzi:
Univ Pisa, Dipartimento Sci Terra, I-56126 Pisa, Italy Univ Pisa Pisa Italy I-56126 Dipartimento Sci Terra, I-56126 Pisa, Italy Ist Nazl Fis Nucl, I-56126 Pisa, Italy Ist Nazl Fis Nucl Pisa Italy I-56126 Nazl Fis Nucl, I-56126 Pisa, Italy Humboldt Univ, Inst Phys, D-10115 Berlin, Germany Humboldt Univ Berlin Germany D-10115 Inst Phys, D-10115 Berlin, Germany Univ Rome 1, Dipartimento Fis, I-00185 Rome, Italy Univ Rome 1 Rome Italy I-00185 1, Dipartimento Fis, I-00185 Rome, Italy Ist Nazl Fis Nucl, I-00185 Rome, Italy Ist Nazl Fis Nucl Rome Italy I-00185 Nazl Fis Nucl, I-00185 Rome, Italy
Titolo Testata:
PHYSICAL REVIEW B
fascicolo: 21, volume: 6321, anno: 2001,
pagine: 4503 -
SICI:
0163-1829(20010601)6321:21<4503:CBOTTX>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
3-DIMENSIONAL O(N) MODELS; VECTOR SPIN MODELS; PARTIAL-DIFFERENTIAL APPROXIMANTS; FLUCTUATING BOUNDARY-CONDITIONS; 2-POINT CORRELATION-FUNCTION; HIGH-TEMPERATURE EXPANSION; SYMANZIK BETA-FUNCTION; CRITICAL EXPONENTS; ISING-MODEL; LAMBDA-POINT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
97
Recensione:
Indirizzi per estratti:
Indirizzo: Campostrini, M Univ Pisa, Dipartimento Sci Terra, I-56126 Pisa, Italy UnivPisa Pisa Italy I-56126 i Terra, I-56126 Pisa, Italy
Citazione:
M. Campostrini et al., "Critical behavior of the three-dimensional XY universality class - art. no. 214503", PHYS REV B, 6321(21), 2001, pp. 4503

Abstract

We improve the theoretical estimates of the critical exponents for the three-dimensional XY universality class. We fine alpha=-0.0146(8), gamma =1.3177(5), nu =0.671 55(27), eta =0.0380(4), beta =0.3485(2), and delta =4.780(2). We observe a discrepancy with the most recent experimental estimate of alpha; this discrepancy calls for further theoretical and experimental investigations. Our results are obtained by combining Monte Carlo simulations based on finite-size scaling methods, and high-temperature expansions. Two improved models (with suppressed leading scaling corrections) are selected by Monte Carlo computation. The critical exponents are computed from high-temperature expansions specialized to these improved models. By the same technique we determine the coefficients of the small-magnetization expansion ofthe equation of state. This expansion is extended analytically by means ofapproximate parametric representations, obtaining the equation of state inthe whole critical region. We also determine the specific-heat amplitude ratio.

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Documento generato il 25/11/20 alle ore 06:57:49