Disorder-tunable entanglement at infinite temperature
- URL: http://arxiv.org/abs/2312.10216v1
- Date: Fri, 15 Dec 2023 21:30:38 GMT
- Title: Disorder-tunable entanglement at infinite temperature
- Authors: Hang Dong, Jean-Yves Desaules, Yu Gao, Ning Wang, Zexian Guo, Jiachen
Chen, Yiren Zou, Feitong Jin, Xuhao Zhu, Pengfei Zhang, Hekang Li, Zhen Wang,
Qiujiang Guo, Junxiang Zhang, Lei Ying, Zlatko Papi\'c
- Abstract summary: We develop a new paradigm of non-thermalizing states with rich entanglement structures in the middle of the energy spectrum.
Our approach harnesses the recently proposed type of non-ergodic behavior known as "rainbow scar"
It provides a knob for designing exotic many-body states that defy thermalization.
- Score: 18.907314041276802
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Complex entanglement structures in many-body quantum systems offer potential
benefits for quantum technology, yet their applicability tends to be severely
limited by thermal noise and disorder. To bypass this roadblock, we utilize a
custom-built superconducting qubit ladder to realize a new paradigm of
non-thermalizing states with rich entanglement structures in the middle of the
energy spectrum. Despite effectively forming an "infinite" temperature
ensemble, these states robustly encode quantum information far from
equilibrium, as we demonstrate by measuring the fidelity and entanglement
entropy in the quench dynamics of the ladder. Our approach harnesses the
recently proposed type of non-ergodic behavior known as "rainbow scar", which
allows us to obtain analytically exact eigenfunctions whose ergodicity-breaking
properties can be conveniently controlled by randomizing the couplings of the
model, without affecting their energy. The on-demand tunability of entanglement
structure via disorder allows for in situ control over ergodicity breaking and
it provides a knob for designing exotic many-body states that defy
thermalization.
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