What is it about?

In this study, we showcase a paradigm of nonlocal quantum manipulation of mesoscopic electronic systems through passive control by the vacuum of THz split-ring cavity resonator. The electronic systems we focus on are mesoscopic moiré superlattices that are formed when two layers of atomically thin 2D semiconductors are stacked with a tiny twisting angle. The interaction between quasiparticles in two spatially separated moiré superlattices without electronic contact is introduced by emitting virtual photon by one and reabsorbing it by the other, as the two moiré superlattices share a common cavity vacuum of the adjacent resonator. This forms the basis of their mutual remote controls. We demonstrate tuning topological transition in one moiré with interlayer bias applied to the other serving as the only control knob.

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Why is it important?

This remote interaction through a shared cavity vacuum offers exciting possibilities for controlling a variety of mesoscopic electronic systems, from topological materials to correlated systems such as superconductors and charge-density-wave phases. This represents a new approach to nonlocally control electronic properties exploiting the vacuum field of cavity resonators, and could potentially lead to groundbreaking applications in quantum technology.


Cavity vacuum control on a wealth of fundamental phenomena remains to be explored. And placing distinct electronic systems within a shared cavity vacuum to investigate their interplays can demonstrate the unique advantage of the vacuum field control. Van der Waals materials are particularly suitable for such study with their diverse electronic properties and flexible integrations with various cavity structures including the split-ring resonators.

The university of Hong Kong

Read the Original

This page is a summary of: Remote gate control of topological transitions in moiré superlattices via cavity vacuum fields, Proceedings of the National Academy of Sciences, August 2023, Proceedings of the National Academy of Sciences,
DOI: 10.1073/pnas.2306584120.
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