Jong Yeon Lee, Yi-Zhuang You, Subir Sachdev, and Ashvin Vishwanath. 2019. “Signatures of a Deconfined Phase Transition on the Shastry-Sutherland Lattice: Applications to Quantum Critical SrCu$_2$(BO$_3$)$_2$.” Phys. Rev. X, 9, Pp. 041037. Publisher's Version
Wenjie Ji, Shu-Heng Shao, and Xiao-Gang Wen. 2019. “Topological Transition on the Conformal Manifold.” arXiv:1909.01425.
Wilbur Shirley, Kevin Slagle, and Xie Chen. 2019. “Twisted foliated fracton phases.” arXiv:1907.09048.
Efim B. Rozenbaum, Sriram Ganeshan, and Victor Galitski. 2019. “Universal level statistics of the out-of-time-ordered operator.” Phys. Rev. B, 100, Pp. 035112. Publisher's Version
Raphael Kaubruegger, Pietro Silvi, Christian Kokail, Rick Van Bijnen, Ana Maria Rey, Jun Ye, Adam M. Kaufman, and Peter Zoller. 2019. “Variational Spin-Squeezing Algorithms on Programmable Quantum Sensors.” Physical Review Letters, 123, Pp. 260505.Abstract
Arrays of atoms trapped in optical tweezers combine features of programmable analog quantum simulators with atomic quantum sensors. Here we propose variational quantum algorithms, tailored for tweezer arrays as programmable quantum sensors, capable of generating entangled states on demand for precision metrology. The scheme is designed to generate metrological enhancement by optimizing it in a feedback loop on the quantum device itself, thus preparing the best entangled states given the available quantum resources. We apply our ideas to the generation of spin-squeezed states on Sr atom tweezer arrays, where finite-range interactions are generated through Rydberg dressing. The complexity of experimental variational optimization of our quantum circuits is expected to scale favorably with system size. We numerically show our approach to be robust to noise, and surpassing known protocols.