395 citations · 1.4k across the 11 of their papers we have counts for
11 papers
Significant-loophole-free test of Kochen-Specker contextuality using two species of atomic-ions
Pengfei Wang, Junhua Zhang, Chun-Yang Luan +7
Quantum measurements cannot be thought of as revealing preexisting results, even when they do not disturb any other measurement in the same trial. This feature is called contextual…
Single ion-qubit exceeding one hour coherence time
Pengfei Wang, Chun-Yang Luan, Mu Qiao +7
Realizing a long coherence time quantum memory is a major challenge of current quantum technology. Here, we report a single \Yb ion-qubit memory with over one hour coherence time,…
Randomness expansion secured by quantum contextuality
Mark Um, Qi Zhao, Junhua Zhang +6
The output randomness from a random number generator can be certified by observing the violation of quantum contextuality inequalities based on the Kochen-Specker theorem. Contextu…
Frequency stabilization of a 650 nm laser to I spectrum for trapped Ba ions
Tian Xie, Naijun Jin, Ye Wang +4
The optical manipulation of Ba ions is mainly performed by a 493 nm laser for the S-P transition and a 650 nm laser for the P-D transition. Si…
Single-qubit quantum memory exceeding -minute coherence time
Ye Wang, Mark Um, Junhua Zhang +6
A long-time quantum memory capable of storing and measuring quantum information at the single-qubit level is an essential ingredient for practical quantum computation and com-munic…
Experimental Preparation of High NOON States for Phonons
Junhua Zhang, Mark Um, Dingshun Lv +3
Multi-party entangled states have important applications in quantum metrology and quantum computation. Experimental preparation of large entangled state, in particular, the NOON st…
Vacuum Measurements and Quantum State Reconstruction of Phonons
Dingshun Lv, Shuoming An, Mark Um +4
A quantum state is fully characterized by its density matrix or equivalently by its quasiprobabilities in phase space. A scheme to identify the quasiprobabilities of a quantum stat…
Realization of near-deterministic arithmetic operations and quantum state engineering
Mark Um, Junhua Zhang, Dingshun Lv +6
Quantum theory is based on a mathematical structure totally different from conventional arithmetic. Due to the symmetric nature of bosonic particles, annihilation or creation of si…
Testing nonclassicality and non-Gaussianity in phase space
Jiyong Park, Junhua Zhang, Jaehak Lee +5
We theoretically propose and experimentally demonstrate a nonclassicality test of single-mode field in phase space, which has an analogy with the nonlocality test proposed by Banas…
Experimental Test of Quantum Jarzynski Equality with a Trapped Ion System
Shuoming An, Jing-Ning Zhang, Mark Um +6
The past two decades witnessed important developments in the field of non-equilibrium statistical mechanics. Among these developments, the Jarzynski equality, being a milestone fol…
State-independent experimental tests of quantum contextuality in a three dimensional system
Xiang Zhang, Mark Um, Junhua Zhang +6
We experimentally observed state-independent violations of Kochen-Specker inequalities for the simplest indivisible quantum system manifesting quantum contextuality, a three-level…