[Chinese]

The main research of the group lies in following three aspects: experimental investigation of trapped-ion quantum information processing; theoretical study of quantum information processing based on atomic systems and solid-state systems; exploration of fundamental quantum theory. The details are as below:

1. Experimental and Theoretical Study of Trapped-Ion Quantum Information Processing 

Ion trap technology can achieve long-term confinement of one or more ions for up to several months. After laser cooling, the trapped ions represent an ideal quantum system, which in essence has important applications, like precision spectral measurements, quantum computation, quantum simulation etc.

We have achieved sideband cooling in our linear Paul trap, and with the ultracold ions, explored some fundamental properties of quantum mechanics and thermodynamics. We have also built a chip trap and explored 6-16 ions in control for configuration phase transition. The theoretical work includes suppression of decoherence, design of multi-qubit entanglement and quantum simulation.

The above results have been published in Science Advances, Physical Review Letters and other top journals in physics.

2. Quantum Information Processing Based on Diamond Color Centers and Superconducting Qubits

The diamond nitrogen-vacancy center system can be employed for room-temperature quantum computing operations. Superconducting qubits are good at large-scale and fast quantum computing.

Our main research focuses on quantum simulation and quantum measurements based on the systems such as diamond nitrogen-vacancy centers, doped fullerenes, micro optical cavities and superconducting quantum circuits. The results are related to entanglement dynamics, non-Markovian environment, quantum metrology and so on.

The above results have been published in Nature Communications, Physical Review Letters and other top journals in physics.

 
3. Quantum Properties of Cavity Opto-Mechanical Systems

The cavity opto-mechanical systems are special quantum systems composed of cavities and mechanical oscillators. This kind of systems can be used to make precision measurement and quantum information processing.

Our research interests mainly focus on the unique physical properties of the cavity opto-mechanical systems, such as light-induced transparency effects, the light-induced absorption, the output-photon correlation and quantum entanglement.