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Published August 12, 2021 | Submitted
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Stirring by Staring: Measurement Induced Chirality

Abstract

Controlling the dynamics of quantum systems is a current frontier of quantum many-body physics. Recent advancements in experimental techniques suggest exciting new directions in drive-induced quantum states. Here, we present a simple scheme that relies solely on occupation measurements to induce a chiral quantum phase. Namely, we show that by utilizing a pattern of repeated quantum measurements we can produce chiral edge transport of fermions hopping on a Lieb lattice. We study in detail the dependence on measurement frequency, showing that in the Zeno limit the system can be described by a classical stochastic dynamics, yielding protected transport. As the frequency of measurements is reduced, the charge flow is reduced and vanishes when no measurements are done.

Additional Information

I.K. would like to thank Kun-Woo Kim for discussions. The work of I.K., B.J.J.K. and M.W. was supported in part by the NSF grant DMR-1918207. G.R. acknowledges support from the Institute of Quantum Information and Matter, an NSF Physics Frontiers Center funded by the Gordon and Betty Moore Foundation, and the Simons Foundation, as well as to the NSF DMR grant number 1839271. This work was performed in part at Aspen Center for Physics, which is supported by National Science Foundation grant PHY-1607611.

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Created:
August 20, 2023
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October 23, 2023