Non-reciprocal interactions and entanglement between optically levitated nanoparticles

Optically levitating dielectric nanoparticles in ultra-high vacuum, where their motion can be cooled into the deep quantum regime, provides a promising platform for force and torque sensing and for high-mass tests of quantum physics. In this talk I will review recent results on the coupled dynamics of co-levitated nanoparticles interacting via optical binding and via electrostatic forces. Further, I will dicsuss how these experiments open the door for probing non-reciprocal interactions [1] and entanglement [2,3] in nanoparticle arrays.

[1] Rieser, Ciampini, Rudolph, Kiesel, Hornberger, Stickler, Aspelmeyer, and Delic, Science 377, 987 (2022)

[2] Rudolph, Hornberger, and Stickler, Phys. Rev. A 101, 011804 (2020).

[3] Rudolph, Delic, Aspelmeyer, Hornberger, and Stickler, Phys. Rev. Lett. (in press)