Publications (15)
Microwave-assisted coherent control of ultracold polar molecules with a ladder-type rotational states
Ting Gong, Zhonghua Ji, Jiaqi Du +3
We have demonstrated microwave-assisted coherent control of ultracold RbCs molecules with a ladder-type configuration of rotational states. A probe microwave (MW) fi…
Dynamical beats of short pulses in waveguide QED
Dianqiang Su, Yuan Jiang, Silvia Cardenas-Lopez +4
We study temporal oscillations, known as dynamical beats, developed by a propagating pulse due to its interaction with a near-resonant collective medium of Cs atoms randoml…
Composite picosecond control of atomic state through a nanofiber interface
Yudi Ma, Ruijuan Liu, Lingjing Ji +6
Atoms are ideal quantum sensors and quantum light emitters. Interfacing atoms with nanophotonic devices promises novel nanoscale sensing and quantum optical functionalities. But pr…
Exceptional nexus in Bose-Einstein condensates with collective dissipation
Chenhao Wang, Nan Li, Jin Xie +6
In multistate non-Hermitian systems, higher-order exceptional points and exotic phenomena with no analogues in two-level systems arise. A paradigm is the exceptional nexus (EX), a…
Detecting Complex-Energy Braiding Topology in a Dissipative Atomic Simulator with Transformer-Based Geometric Tomography
Yang Yue, Nan Li, Xin Zhang +8
Machine learning (ML) is shaping our exploration of topological matter, whose existence is inherently tied to the geometry of quantum states or energy spectra. In non-Hermitian sys…
Torsional optomechanical cooling of a nanofiber
Dianqiang Su, Pablo Solano, Jeffrey D. Wack +2
We demonstrate the optomechanical cooling of a tapered optical nanofiber by coupling the polarization of light to the mechanical angular momentum of the system. The coupling is ena…
A simple, reliable, and no-destructive method for the measurement of vacuum pressure
Jinpeng Yuan, Zhonghua Ji, Yanting Zhao +3
We present a simple, reliable, and no-destructive method for the measurement of vacuum pressure in a magneto-optical trap. The vacuum pressure is verified to be proportional to col…
V-type electromagnetically induced transparency and saturation effect at the gas-solid interface
Tengfei Meng, Yanting Zhao, Zhonghua Ji +3
We theoretically study electromagnetically induced transparency (EIT) in reflection spectra of V-type system at the gas-solid interface. In addition to a narrow dip arising from th…
Optimization and analysis of experimental parameters for polarization gradient cooling in optical molasses
Zhonghua Ji, Jinpeng Yuan, Yanting Zhao +4
We systematically investigate the dependence of the temperature of cold cesium atoms of polarization gradient cooling (PGC) in optical molasses on experimental parameters, which co…
Optomechanical feedback cooling of a 5 mm-long torsional mode
Dianqiang Su, Yuan Jiang, Pablo Solano +3
We report three orders of magnitude optical cooling of the fundamental torsional mode of a 5 mm-long, 550 nm diameter optical nanofiber. The rotation of the nanofiber couples to th…
Voltage and power-frequency electric field measurements with Rydberg-atom interferometry
Yingying Han, Changfa He, Zhenxiong Weng +3
We present a Rydberg-atom interferometry-based technique for voltage measurement between electrodes embedded in an atomic vapor cell, enabling the detection of weak voltages ($<0.1…
Phase-sensitive Rydberg-atom interferometry with Floquet electromagnetically induced transparency
Yingying Han, Changfa He, Peng Xu +3
We design a phase-sensitive Rydberg-atom interferometry by implementing Floquet electromagnetically induced transparency (FEIT). The FEIT mixes the sidebands of a Rydberg state ind…
Microwave coherent control of ultracold ground-state molecules formed by short-range photoassociation
Zhonghua Ji, Ting Gong, Yonglin He +4
We report the observation of microwave coherent control of rotational states of ultracold RbCs molecules formed in their vibronic ground state by short-range photoas…
Dynamical process of optically trapped singlet ground state RbCs molecules produced via short-range photoassociation
Zhonghao Li, Ting Gong, Zhonghua Ji +3
We investigate the dynamical process of optically trapped X (v" = 0) state RbCs molecules distributing in J" = 1 and J" = 3 rotational states. The co…
Ferromagnetic Traps for Quasi-Continuous Operation of Optical Nanofiber Interfaces
Ruijuan Liu, Jinggu Wu, Yuan Jiang +2
A soft ferromagnetic plate uniformizes Tesla-level fields generated by attached permanent magnets, producing a smooth and electronically tunable surface field on the opposite side.…