Monday, November 12, 2012

1211.2043 (Suman Ghosh et al.)

Entanglement signatures of phase transition in higher-derivative quantum
field theories
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Suman Ghosh, S. Shankaranarayanan
We show that the variation of the ground state entanglement in linear, higher spatial derivatives field theories at zero-temperature have signatures of phase transition. Around the critical point, when the dispersion relation changes from linear to non-linear, there is a fundamental change in the reduced density matrix leading to a change in the scaling of entanglement entropy. We suggest possible explanations involving both kinematical and dynamical effects. We discuss the implication of our work for 2-D condensed matter systems, black-hole entropy and models of quantum gravity.
View original: http://arxiv.org/abs/1211.2043

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