The quantum ground state of a massive mechanical system is a step** stone for
investigating macroscopic quantum states and building high fidelity sensors. With the recent …

The dark-mode effect is a stubborn obstacle for ground-state cooling of multiple degenerate
mechanical modes optomechanically coupled to a common cavity-field mode. Here we …

Quantum entanglement not only plays an important role in the study of the fundamentals of
quantum theory, but also is considered as a crucial resource in quantum information …

The development of quantum optomechanics enables the manipulation of the quantum state
of a macroscopic object and the conversion of frequency in different domains in quantum …

We explore, experimentally and theoretically, the emergence of coherent coupled
oscillations and synchronization between a pair of non-Hermitian, stochastic, opto …

We propose a method to realize the simultaneous ground-state refrigeration of two
vibrational modes beyond the resolved-sideband regime via an auxiliary feedback loop …

Optically levitated nanoparticles emerged as an interesting platform for probing fundamental
physics. Quantum control of their motion (including potential sha**) predisposes them for …

Optomechanical cooling of multiple degenerate mechanical modes is prevented by the
mechanical dark mode due to destructive interference. Here, we report the first experimental …

Simultaneous ground-state cooling of multiple degenerate mechanical modes is a difficult
issue in optomechanical systems, owing to the existence of the dark mode effect. Here we …

We propose and prove two theorems for determining the number of dark modes in linear two-
component quantum networks composed of two types of bosonic modes. This is achieved by …