Measuring entanglement using quantum quenches
arXiv:1012.5116 · doi:10.1103/PhysRevLett.106.150404
Abstract
We show that block entanglement entropies in one-dimensional systems close to a quantum critical point can in principle be measured in terms of the population of low-lying energy levels following a certain type of local quantum quench.
5 pages, 2 figures. v2: references added, minor text changes
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