Theory seminar: Stabilization and engineering of exotic far-from-equilibrium gauge-theory phenomena
Jad C. Halimeh (LMU)
In recent years, exotic far-from-equilibrium phenomena have been discovered that lead to novel paradigms in condensed matter and particle physics, with salient examples ranging from string breaking to quantum many-body scarred dynamics and disorder-free localization.
Jad C. Halimeh (LMU)
Group seminar via Zoom
Mon, 7. February 2022, 11:30 am (MEZ)
In recent years, exotic far-from-equilibrium phenomena have been discovered that lead to novel paradigms in condensed matter and particle physics, with salient examples ranging from string breaking to quantum many-body scarred dynamics and disorder-free localization. Underlying many of these phenomena are gauge symmetries, which endow their host models with rich dynamical behavior arising from the plethora of underlying local constraints. The high level of control and precision in today’s synthetic quantum matter experiments has facilitated first attempts at realizing gauge theories. However, a major challenge in this endeavor is stabilizing the core property of these models, gauge symmetry. We will discuss our recent work on gauge protection schemes based on the concept of quantum Zeno dynamics, which reliably stabilize gauge symmetries and also protect salient dynamical features such as disorder-free localization. We will also discuss the concept of local pseudogenerators, which are experimentally feasible simplifications of the actual gauge-symmetry generators. In concert with the quantum Zeno effect, they can be used to enhance disorder-free localization through the dynamical emergence of a gauge theory with an enriched local symmetry. We discuss recent experimental work based on our schemes, and also present our new experimental proposals that are undergoing implementation. Finally, we briefly present upcoming theoretical results that extend the aforementioned schemes.
 JCH and P. Hauke, Phys. Rev. Lett. 125, 030503 (2020)
 JCH et al., PRX Quantum 2, 040311 (2021)
 JCH et al., arXiv:2106.09032
 JCH et al., arXiv:2108.02203
 JCH et al., arXiv:2111.02427
 JCH et al., arXiv:2111.08715
 Yang et al. (JCH), Nature 587, 392 (2020)
 Zhou et al. (JCH), arXiv:2107.13563 (to appear in Science)
 Su et al. (JCH), arXiv:2201.00821
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