Konik, R. M. and Pálmai, Tamás Vencel and Takács, Gábor and Tsvelik, A. M. (2015) Studying the perturbed Wess–Zumino–Novikov–Witten theory using the truncated conformal spectrum approach. NUCLEAR PHYSICS B, 899. pp. 547-569. ISSN 0550-3213
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Abstract
We study the SU ( 2 ) k Wess–Zumino–Novikov–Witten (WZNW) theory perturbed by the trace of the primary field in the adjoint representation, a theory governing the low-energy behaviour of a class of strongly correlated electronic systems. While the model is non-integrable, its dynamics can be investigated using the numerical technique of the truncated conformal spectrum approach combined with numerical and analytical renormalization groups (TCSA + RG). The numerical results so obtained provide support for a semiclassical analysis valid at k ≫ 1 . Namely, we find that the low energy behavior is sensitive to the sign of the coupling constant, λ. Moreover for λ > 0 this behavior depends on whether k is even or odd. With k even, we find definitive evidence that the model at low energies is equivalent to the massive O(3) sigma model. For k odd, the numerical evidence is more equivocal, but we find indications that the low energy effective theory is critical.
Item Type: | Article |
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Subjects: | Q Science / természettudomány > QC Physics / fizika |
SWORD Depositor: | MTMT SWORD |
Depositing User: | MTMT SWORD |
Date Deposited: | 09 Nov 2023 13:55 |
Last Modified: | 09 Nov 2023 13:55 |
URI: | http://real.mtak.hu/id/eprint/179458 |
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