Li You, Professor of Tsinghua University, is director of the Institute of atomic, molecular, and optical physics. Dr. You obtained his BS from Nanjing University in 1987 and studied overseas through the US-China CUSPEA program. In 1993, he completed Ph.D. at JILA, University of Colorado. From 1993-1996, he was a postdoc at the Institute of atomic and molecular physics of Harvard-Smithsonian Center for Astrophysics. He was Assistant, Associate, and Full Professor at Georgia Institute of Technology from 1996-2010 and joined Tsinghua University in 2009. Dr. You is a Fellow of American Physical Society (2007). He is a recipient of US NSF Career Award (1997), a ONR Young Investigator (1997). With collaborators, he won the first prize of annual essay award from Gravity Research Foundation (2013). His recent effort “Deterministic entanglement generation from driving through quantum phase transitions,” was voted one of the Top Ten major scientific advances in China (2017).
Ensembles of atomic qubits can exhibit quantum advantages in communication, sensing or precision measurement, and quantum simulation or computation. This talk will introduce the basics of such quantum science and technology. We will report recent research efforts on two frontier topics: (1) enhanced sensing precision beyond classical limit in linear interferometry by improved signal-to-noise ratio with entangled atoms with suppressed quantum noise; or in nonlinear interferometry by noiseless signal amplification with interaction-based-readout from coherent disentanglement dynamics; (2) arrays of Rydberg atom qubits can be assembled from bottom up into systems sizes capable of quantum supremacy, demonstrating quantum information processing tasks beyond the capabilities of all current computers.