Ensemble dependence in the random transverse-field Ising chain

Dhar, Abhishek; Young, A.P.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/1222

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DC Field	Value	Language
dc.contributor.author	Dhar, Abhishek	-
dc.contributor.author	Young, A.P.	-
dc.date.accessioned	2006-05-12T10:56:38Z	-
dc.date.available	2006-05-12T10:56:38Z	-
dc.date.issued	2003-10-23	-
dc.identifier.citation	Physical Review B, 2003, Vol.68, 134441	en
dc.identifier.issn	1098-0121	-
dc.identifier.issn	1550-235X (online)	-
dc.identifier.uri	http://hdl.handle.net/2289/1222	-
dc.description.abstract	In a disordered system one can either consider a microcanonical ensemble, where there is a precise constraint on the random variables, or a canonical ensemble where the variables are chosen according to a distribution without constraints. We address the question as to whether critical exponents in these two cases can differ through a detailed study of the random transverse-field Ising chain. We find that the exponents are the same in both ensembles, though some critical amplitudes vanish in the microcanonical ensemble for correlations which span the whole system and are particularly sensitive to the constraint. This can appear as a different exponent. We expect that this apparent dependence of exponents on ensemble is related to the integrability of the model, and would not occur in nonintegrable models.	en
dc.format.extent	693006 bytes	-
dc.format.mimetype	application/pdf	-
dc.language.iso	en	en
dc.publisher	The American Physical Society	en
dc.relation.uri	http://link.aps.org/abstract/PRB/v68/e134441	en
dc.rights	(2003) by the American Physical Society	en
dc.title	Ensemble dependence in the random transverse-field Ising chain	en
dc.type	Article	en
Appears in Collections:	Research Papers (TP)

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