Efficient quantum state transfer in coupled levitated nanoparticle system*

 Sandeep Sharma^{1, *}, Seongi Hong¹, and Andrey S. Moskalenko<sup>1

1</sup>Department of Physics, KAIST, Daejeon 34141, South Korea

 

Successful trapping and levitation of two or more nanoparticles have opened up a new avenue for exploring many-body physics such as coherent manipulation of quantum states, entanglement dynamics, tunable quantum sensing, and nonequilibrium physics using these systems [1].

We report on the creation and transfer of different quantum states in a system of two interacting levitated nanoparticles. The nanoparticles are levitated using two distinct optical tweezers and interact with each other via the scattered fields of the trapping lasers constituting the tweezers. We create a squeezed thermal state in the mechanical mode of one nanoparticle, and then by suitably changing the trapping laser phases and the inter-particle distance, we transfer it to the other nanoparticle with very high fidelity. Further, we confirm this high transfer fidelity rate by creating and transferring a coherent state as well. Our work may have potential application in quantum information processing.

 

[1] J. Rieser, M. A. Ciampini, H. Rudolph, N. Kiesel, K. Hornberger, B. A. Stickler, M. Aspelmeyer, and U. Delić, Science 377, 987 (2022).