Floquet engineering of nonreciprocal light-induced dipolar interactions

TL;DR

This paper introduces Floquet engineering of nonreciprocal light-induced dipolar interactions in tweezer arrays, enabling advanced quantum operations and tunable complex eigenfrequencies for exploring non-Hermitian physics.

Contribution

It extends light-induced dipolar interactions into Floquet-driven regimes with nonreciprocity, providing a new toolbox for quantum control and many-body physics.

Findings

Demonstrated beamsplitter, single-, and two-mode squeezing operations.

Observed signatures of a negative-mass-like oscillator.

Achieved continuous tuning of complex eigenfrequencies.

Abstract

Tweezer arrays of polarizable objects are a promising platform for assembling quantum matter and building next-generation quantum sensors. Light-induced dipolar interactions have emerged as a method to couple their motion, thereby establishing a new paradigm for controlling collective mechanical degrees of freedom. Here, we extend these into the regime of Floquet-driven interactions, combined with the intrinsic nonreciprocity of optical forces. We demonstrate beamsplitter, single-, and two-mode squeezing operations, as well as signatures of a negative-mass-like oscillator arising from the nonreciprocity. Moreover, we show that a programmable combination of these operations enables continuous tuning of complex eigenfrequencies. These results establish a toolbox of quantum operations of nonreciprocal interactions that are essential for investigating non-Hermitian many-body physics and collective quantum optomechanics.