Quantum dimension as entanglement entropy in two dimensional conformal field theories

Quantum dimension as entanglement entropy in two dimensional conformal field theories
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量子维数作为二维共形场论中的纠缠熵

DOI:
10.1103/physrevd.90.041701
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发表时间:
2014-03
期刊:
Phys.Rev. D
影响因子:
--
通讯作者:
Kento Watanabe
Kento Watanabe
中科院分区:
其他
文献类型:
--
作者:
何松;Tokiro Numasawa;Tadashi Takayanagi;Kento Watanabe

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研究了二维共形场理论中激发态的纠缠熵。特别地,我们考虑了由作用于具有主算子的真空而得到的激发态。我们证明了纠缠熵在它的时间演化中以一个有限的常数增加。此外,在理性共形场论中,我们证明了(Renyi和von Neumann)纠缠熵的增加总是与主算子量子维的对数一致。
We study the entanglement entropy of excited states in two-dimensional conformal field theories (CFTs). In particular, we consider excited states obtained by acting on a vacuum with primary operators. We show that the entanglement entropy increases by a finite constant amount under its time evolution. Moreover, in rational conformal field theories, we prove that this increase of the (both Renyi and von Neumann) entanglement entropy always coincides with the log of the quantum dimension of the primary operator.
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