Optomechanics in the Quantum Regime

Shabir Barzanjeh, André Xuereb, Simon Gröblacher +3 more

Roohollah Ghobadi, Dustin Kleckner, Brian J. Pepper +3 more

We have studied the simplest optomechanical system close to and in the bistable regime. We find that Optomechanical entanglement is particularly strong in this regime for large enough detuning. The robustness of entanglement against temperature is also studied.

Yong‐Chun Liu, Li You

Tai-Shuang Yin, Xin‐You Lü, Lili Zheng +3 more

The nonlinear quantum regime is crucial for implementing interesting quantum effects, which have wide applications in modern quantum science. Here we propose an effective method to reach the nonlinear quantum regime in a modulated optomechanical system (OMS), which is originally in the weak-coupling regime. The mechanical spring constant and optomechanical interaction are modulated periodically. This leads to the result that the resonant optomechanical interaction can be effectively enhanced into the single-photon strong-coupling regime by the modulation-induced mechanical parametric amplification. Moreover, the amplified phonon noise can be suppressed completely by introducing a squeezed vacuum reservoir, which ultimately leads to the realization of photon blockade in a weakly coupled OMS. The reached nonlinear quantum regime also allows us to engineer the nonclassical states (e.g., Schr\"odinger cat states) of the cavity field, which are robust against the phonon noise. This work offers an alternative approach to enhance the quantum nonlinearity of an OMS, which should expand the applications of cavity optomechanics in the quantum realm.

Matteo Brunelli, Daniel Malz, Albert Schliesser +1 more

The authors formulate a theory for stroboscopic quantum optomechanics, where an optomechanical cavity is illuminated by a train of short pulses. This work extends the range of parameters for which the quantum regime can be accessed in optomechanical systems and affords a new route to mechanical quantum state preparation and verification.

Warwick P. Bowen, Gerard J Milburn