Analytical results for the entanglement Hamiltonian of a free-fermion chain
Abstract
We study the ground-state entanglement Hamiltonian for an interval of N sites in a free-fermion chain with arbitrary filling. By relating it to a commuting operator, we find explicit expressions for its matrix elements in the large-N limit. The results agree with numerical calculations and show that deviations from the conformal prediction persist even for large systems.
Dedicated to John Cardy on the occasion of his 70th birthday.- Publication:
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Journal of Physics A Mathematical General
- Pub Date:
- July 2017
- DOI:
- 10.1088/1751-8121/aa76b5
- arXiv:
- arXiv:1703.08126
- Bibcode:
- 2017JPhA...50B4003E
- Keywords:
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- Condensed Matter - Statistical Mechanics
- E-Print:
- 21 pages, 8 figures. Dedicated to John Cardy on the occasion of his 70th birthday. v2: minor corrections, published version