Gapless quantum spin chains: multiple dynamics and conformal wavefunctions
Gapless quantum spin chains: multiple dynamics and conformal wavefunctions
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无间隙量子自旋链:多重动力学和共形波函数
DOI:
10.1088/1751-8121/aa8dbc
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Witczak-Krempa, William
中科院分区:
文献类型:
--
作者:
Chen, Xiao;Fradkin, Eduardo;Witczak-Krempa, William
We study gapless quantum spin chains with spin 1/2 and 1: the Fredkin and Motzkin models. Their entangled groundstates are known exactly but not their excitation spectra. We first express the groundstates in the continuum which allows for the calculation of spin and entanglement properties in a unified fashion. Doing so, we uncover an emergent conformal-type symmetry, thus consolidating the connection to a widely studied family of Lifshitz quantum critical points in 2d. We then obtain the low lying excited states via large-scale DMRG simulations and find that the dynamical exponent is
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影响因子:
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期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
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通讯作者:
V. Gates;.. M. L. Ludwig-M.-L.-Ludwig-2273875465;J. A. Hartsuck;T. A. Steitz;H. Muirhead;J. C. Coppola;G. N. Reeke