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Fibonacci steady states in a driven integrable quantum system

Maity, Somnath and Bhattacharya, Utso and Dutta, Amit and Sen, Diptiman (2019) Fibonacci steady states in a driven integrable quantum system. In: PHYSICAL REVIEW B, 99 (2).

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Official URL: https://doi.org/10.1103/PhysRevB.99.020306


We study an integrable system that is reducible to free fermions by a Jordan-Wigner transformation which is subjected to a Fibonacci driving protocol based on two noncommuting Hamiltonians. In the high-frequency limit omega -> infinity, we show that the system reaches a nonequilibrium steady state, up to some small fluctuations which can be quantified. For each momentum k, the trajectory of the stroboscopically observed state lies between two concentric circles on the Bloch sphere; the circles represent the boundaries of the small fluctuations. The residual energy is found to oscillate in a quasiperiodic way between two values which correspond to the two Hamiltonians that define the Fibonacci protocol. These results can be understood in terms of an effective Hamiltonian which simulates the dynamics of the system in the high-frequency limit.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to AMER PHYSICAL SOC
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 14 Feb 2019 05:50
Last Modified: 14 Feb 2019 05:50
URI: http://eprints.iisc.ac.in/id/eprint/61698

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