Quantum

Standard and Bipolar Rectification in Tilted Periodically-Driven Quantum Systems

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Briefings

This arXiv preprint establishes a rectification mechanism in fermionic systems driven by a tilted potential modulated by a time-periodic field. The drive generates particle and energy currents even without external chemical or thermal bias, with currents enhanced at resonant frequencies where avoided crossings occur in the Floquet quasienergy spectrum. When a bias is introduced, the drive-induced current can reinforce, compete with, or cancel the bias-induced contribution, enabling both standard and bipolar rectification regimes. In the non-interacting regime, the rectification coefficient R quantifies asymmetry between up and down tilt transport; in interacting regimes, R is enhanced by many orders of magnitude. The findings suggest experimental realizations in condensed matter and cold atom systems.

Key points

• A time-periodic drive on a tilted potential generates particle and energy currents in fermionic systems without external chemical or thermal bias.
• The rectification coefficient R quantifies asymmetry between transport up and down the tilt, reaching perfect rectification at the boundary between standard and bipolar regimes.

Context

This work advances quantum circuit technologies by providing a rectification mechanism for correlated systems. The findings are significant for understanding transport in non-equilibrium quantum systems and potential applications in condensed matter and cold atom experiments.

Limitations

The evidence is an unverified preprint (arXiv:2610.20765v1) with no experimental validation. Results are limited to the non-interacting and interacting regimes described; specific material parameters, exact drive frequencies, and precise interaction strengths are not provided.

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