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Entanglement evolution after connecting finite to infinite quantum chains
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Entanglement evolution after connecting finite to infinite quantum chains
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We study zero-temperature XX chains and transverse Ising chains and join an initially separate finite piece on one or on both sides to an infinite remainder. In both critical and non-critical systems we find a typical increase of the entanglement entropy after the quench, followed by a slow decay towards the value of the homogeneous chain. In the critical case, the predictions of conformal field theory are verified for the first phase of the evolution, while at late times a step structure can be observed.
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Cited by 1 Pith paper
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Boundary quenches in (1+1)-dimensional conformal field theory
A boundary quench in a (1+1)-d CFT makes one-point functions switch from old to new ground state across a light cone and makes adjacent-region entanglement jump by log(g_b/g_a).
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