# Personal Information

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Professor
Supervisor of Doctorate Candidates
**

**Main Positions:**Professor of Physics

# Profile

**Zhen-Sheng YUAN**, is Professor of Physics at the University of Science and Technology of China. He received a Bachelar of Science in 1998 and a Doctor of Philosophy in 2003 both from USTC, and started to work at USTC as a lecturer. Since 2006 till 2011, he had been working at the Physics Institute of Heidelberg University as a Postdoc, an Alexander von Humboldt fellow, a senior researcher and CoPI successively. In 2011, he returned to USTC and held a professorship then.

His research interest is in studying the physics of ultracold atoms, especially the open questions in strongly correlated many-body systems which are fundamental to condensed matter, quantum materials, particle physics, and evolution of the early Universe, etc. He developed the cutting-edge experimental techniques for coherently manipulating quantum states of many atoms with an unprecedentedly high precision and a capability of resolving lattice sites and number of atoms. Intriguing physics of multi-atom entanglement, emerging symmetry and quantum criticality, and quantum thermalization dynamics have been explored by building quantum simulators. This will dramatically extend the accessible territory of physics and offers a great potential for the applications in quantum information processing and precision measurement.

**Research Interest:**

**I. Quantum simulation with ultracold atoms**

* Implementation of four-body ring-exchange interaction and observation of fractional anyonic statistics [1];

* Realization of staggered-immersion cooling, a brand-new cooling method for achieving an ultralow entropy in optical lattice systems [2];

* Simulating 1D Schwinger model with a Bose-Hubbard simulator leads to the observation of Coleman phase transition and local gauge invariance at a microscopic perspective

* Experiments on thermalization dynamics of a lattice gauge theory, connecting the far-from-equilibrium behavior at early evolution times with the possible late-time approach to thermal equilibrium which is helpful for understanding the physics in collisions of heavy nuclei [4, 5].

**II. Multipartite entanglement and light-atom interface**

* Implementation of a deterministic and storable single-photon source based on a quantum memory [6];

* Parallel and deterministic generation of ∼ 1000 entangled pairs of atoms [2, 7, 8];

* Realization of a quantum repeater node with the interaction between photons and atomic-ensemble based quantum memory [9];

* Review on entangled photons and quantum communication [10].

**Representative publications:**

1. Han-Ning Dai et al. *Four-body ring-exchange interactions and anyonic statistics within a minimal toric-code hamiltonian*. **Nature Physics**, 13(12):1195–1200, 2017.

2. Bing Yang et al. *Cooling and entangling ultracold atoms in optical lattices.* **Science**, 369(6503):550–553, 2020.

3. Bing Yang et al*. Observation of gauge invariance in a 71-site bose–hubbard quantum simulator*. **Nature**, 587(7834):392–396, 2020.

4. Zhao-Yu Zhou et al. *Thermalization dynamics of a gauge theory on a quantum simulator*. **Science**, 377(6603):311–314, 2022.

5. Han-Yi Wang et al. *Interrelated thermalization and quantum criticality in a lattice gauge **simulator*. **Physical Review Letters**, 131(5):050401, 2023.

6. Shuai Chen et al. *Deterministic and storable single-photon source based on a quantum memory*. **Physical Review Letters**, 97(17):173004, 2006.

7. Han-Ning Dai et al. *Generation and detection of atomic spin entanglement in optical lattices*. **Nature Physics**, 12:783–787, 2016.

8. Wei-Yong Zhang et al. *Scalable multipartite entanglement created by spin exchange in an optical lattice*. **Physical Review Letters,** 131(7):073401, 2023.

9. Zhen-Sheng Yuan** **et al. *Experimental demonstration of a BDCZ quantum repeater node*. **Nature**, 454(7208):1098–1101, 2008.

10. Zhen-Sheng Yuan et al. *Entangled photons and quantum communication*. **Physics Reports**, 497(1):1–40, 2010.

11. Xiao-Jing Liu et al. *Dynamical correlation in double excitations of helium studied by high-resolution and angular-resolved fast-electron energy-loss spectroscopy in absolute measurements*. **Physical Review Letters**, 91(19):193203, 2003.

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