455 citations · 1.6k across the 20 of their papers we have counts for
20 papers
Deterministic preparation of supersinglets with collective spin projections
Ebubechukwu O. Ilo-Okeke, Yangxu Ji, Ping Chen +5
We introduce a procedure to generate supersinglets, the multipartite generalization of angular momentum singlet states. A supersinglet is defined as a total spin zero state consist…
Topological atomic spinwave lattices by dissipative couplings
Dongdong Hao, Lin Wang, Xingda Lu +4
Recent experimental advance in creating dissipative couplings provides a new route for engineering exotic lattice systems and exploring topological dissipation. Using the spatial l…
Non-reciprocity and quantum correlations of light transport in hot atoms via reservoir engineering
Xingda Lu, Wanxia Cao, Wei Yi +2
The breaking of reciprocity is a topic of great interest in fundamental physics and optical information processing applications. We demonstrate non-reciprocal light transport in a…
Retrodiction beyond the Heisenberg uncertainty relation
Han Bao, Shenchao Jin, Junlei Duan +4
In quantum mechanics, the Heisenberg uncertainty relation presents an ultimate limit to the precision by which one can predict the outcome of position and momentum measurements on…
Entanglement-Enhanced Optical Atomic Clock
Edwin Pedrozo-Peñafiel, Simone Colombo, Chi Shu +8
State-of-the-art atomic clocks are based on the precise detection of the energy difference between two atomic levels, measured as a quantum phase accumulated in a given time interv…
Quantum correlations near the exceptional point
Wanxia Cao, Xingda Lu, Xin Meng +3
Recent advances in non-Hermitian physical systems have led to numerous novel optical phenomena and applications. However, most realizations are limited to classical systems and qua…
Near-Unitary Spin Squeezing in Yb
Boris Braverman, Akio Kawasaki, Edwin Pedrozo-Peñafiel +9
Spin squeezing can improve atomic precision measurements beyond the standard quantum limit (SQL), and unitary spin squeezing is essential for improving atomic clocks. We report sub…
Entangling and squeezing atoms by weak measurement
Mingfeng Wang, Weizhi Qu, Han Bao +2
A weak measurement approach is proposed to entangle and squeeze atoms. We show that even for very small coupling strength between light and atoms, one can achieve large squeezing u…
Spatial multiplexing of squeezed light by coherence diffusion
Jian Sun, Weizhi Qu, Eugeniy Mikhailov +3
Spatially splitting nonclassical light beams is in principle prohibited due to noise contamination during beam splitting. We propose a platform based on thermal motion of atoms to…
Sub-Hertz resonance by weak measurement
Weizhi Qu, Jian Sun, Shenchao Jin +3
Weak measurement (WM) with state pre- and post-selection can amplify otherwise undetectable small signals and thus promise great potentials in precision measurements. Although freq…
Geometrically asymmetric optical cavity for strong atom-photon coupling
Akio Kawasaki, Boris Braverman, Edwin Pedrozo-Peñafiel +11
Optical cavities are widely used to enhance the interaction between atoms and light. Typical designs using a geometrically symmetric structure in the near-concentric regime face a…
Measurements with prediction and retrodiction on the collective spin of 10^{11} atoms beat the standard quantum limit
Han Bao, Junlei Duan, Xingda Lu +10
Quantum probes using uncorrelated particles give a limit on the measurement sensitivity referred to as the standard quantum limit (SQL). The SQL, however, can be overcome by ex…
Subnatural-linewidth biphotons from a Doppler-broadened hot atomic vapor cell
Chi Shu, Peng Chen, Tsz Kiu Aaron Chow +4
We report the efficient generation of subnatural-linewidth (< 6 MHz, for Rb D1/D2 lines) biphotons from a Doppler-broadened (530 MHz) hot atomic vapor cell. We use on-resonance spo…
Anti-Parity-Time Symmetric Optics via Flying Atoms
Peng Peng, Wanxia Cao, Ce Shen +4
The recently-developed notion of 'parity-time (PT) symmetry' in optical systems with a controlled gain-loss interplay has spawned an intriguing way of achieving optical behaviors t…
Two-axis-twisting spin squeezing by multi-pass quantum erasure
Mingfeng Wang, Weizhi Qu, Pengxiong Li +3
Many-body entangled states are key elements in quantum information science and quantum metrology. One important problem in establishing a high degree of many-body entanglement usin…
Excess optical quantum noise in atomic sensors
Irina Novikova, Eugeniy E. Mikhailov, Yanhong Xiao
Enhanced nonlinear optical response of a coherent atomic medium is the basis for many atomic sensors, and their performance is ultimately limited by the quantum fluctuations of the…
Tuning the phase sensitivity of a double-lambda system with a static magnetic field
Xiwei Xu, Shuo Shen, Yanhong Xiao
We study the effect of a DC magnetic field on the phase sensitivity of a double-lambda system coupled by two laser fields, a probe and a pump. It is demonstrated that the gain and…
Transition linewidth of cross-correlations in random intensity fluctuations in EIT
Lei Feng, Pengxiong Li, Mengzhen Zhang +2
It is known that cross-correlation between the random intensity fluctuations of two lasers forming electromagnetically-induced transparency (EIT) exhibits a transition from correla…
Coherence assisted resonance with sub-lifetime-limited linewidth
Feng Lei, Pengxiong Li, Liang Jiang +2
We demonstrate a novel approach to obtain resonance linewidth below that limited by coherence lifetime. Cross correlation between induced intensity modulation of two lasers couplin…
Diffusion-induced Ramsey narrowing
Yanhong Xiao, Irina Novikova, David F. Phillips +1
A novel form of Ramsey narrowing is identified and characterized. For long-lived coherent atomic states coupled by laser fields, the diffusion of atoms in-and-out of the laser beam…