Optimal control of hybrid optomechanical systems for generating non-classical states of mechanical motion
Artikel i vetenskaplig tidskrift, 2019

Cavity optomechanical systems are one of the leading experimental platforms for controlling mechanical motion in the quantum regime. We exemplify that the control over cavity optomechanical systems greatly increases by coupling the cavity also to a two-level system, thereby creating a hybrid optomechanical system. If the two-level system can be driven largely independently of the cavity, we show that the nonlinearity thus introduced enables us to steer the extended system to non-classical target states of the mechanical oscillator with Wigner functions exhibiting significant negative regions. We illustrate how to use optimal control techniques beyond the linear regime to drive the hybrid system from the near ground state into a Fock target state of the mechanical oscillator. We base our numerical optimization on realistic experimental parameters for exemplifying how optimal control enables the preparation of decidedly non-classical target states, where naive control schemes fail. Our results thus pave the way for applying the toolbox of optimal control in hybrid optomechanical systems for generating non-classical mechanical states.

optomechanics

quantum control

non-classical states

optimal control

Författare

Ville Bergholm

Technische Universität München

Witlef Wieczorek

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Thomas Schulte-Herbrueggen

Technische Universität München

Michael Keyl

Freie Universität Berlin

QUANTUM SCIENCE AND TECHNOLOGY

2058-9565 (ISSN)

Vol. 4 3 034001

Ämneskategorier

Reglerteknik

Signalbehandling

Annan elektroteknik och elektronik

DOI

10.1088/2058-9565/ab1682

Mer information

Senast uppdaterat

2019-08-26