| DATE: |
2014-11-18 11:00 - 12:00 |
| PLACE: |
Kenkyu Honkan 1F Meeting Room 3 |
| TITLE: |
Entanglement Entropy in Gapped System |
| CONTACT: |
Yoske Sumitomo |
| SPEAKER: |
Tatsuma Nishioka (The Univ. of Tokyo) |
| LANGUAGE: |
English |
| ABSTRACT: |
Entanglement entropy is a useful order parameter charactering phases in quantum field theories in various dimensions. For example, it can capture confinement/deconfinement and quantum phase transitions. The analytic computations, however, are limited to special cases such as conformal and free field theories. In this talk, I would like to elucidate various properties of entanglement entropy in gapped systems by using both field theoretic and holographic approaches. I will also discuss how entanglement entropy behaves under a perturbation of CFT by a relevant operator and point out that the perturbative calculation may fail depending on the conformal dimension. |
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