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Fast scrambling without appealing to holographic duality
oleh: Zehan Li, Sayan Choudhury, W. Vincent Liu
Format: | Article |
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Diterbitkan: | American Physical Society 2020-12-01 |
Deskripsi
Motivated by the question of whether all fast scramblers are holographically dual to quantum gravity, we study the dynamics of a nonintegrable spin chain model composed of two ingredients: a nearest neighbor Ising coupling, and an infinite range XX interaction. Unlike other fast scrambling many-body systems, this model is not known to be dual to a black hole. We quantify the spreading of quantum information using an out-of time-ordered correlator (OTOC), and demonstrate that our model exhibits fast scrambling for a wide parameter regime. Simulation of its quench dynamics finds that the rapid decline of the OTOC is accompanied by a fast growth of the entanglement entropy, as well as a swift change in the magnetization. Finally, potential realizations of our model are proposed in current experimental setups. Our work establishes a promising route to create fast scramblers.