| 报告题目 | Probing Entanglement Entropy and Thermalization in a Quantum Gas Microscope |
| 报告人 | Dr. Philipp Preiss |
| 报告人单位 | Physikalisches Institut, Heidelberg University, Heidelberg, Germany and Department of Physics, Harvard University, Cambridge, MA, USA |
| 报告时间 | 2016-08-17 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室（9004） |
| 主办单位 | 合肥微尺度物质科学国家实验室、量子信息与量子科技前沿协同创新中心、物理学院 |
| 报告介绍 | 报告摘要：
With the advent of quantum gas microscopy of ultracold atoms in optical lattices, it is possible to detect and control all degrees of freedom of each particle comprising a many-body system. The emerging, strongly correlated quantum phases, which may be engineered with single-particle control, are characterized by large-scale entanglement between all constituents.
In this talk I will present an experimental scheme to directly probe such entanglement in itinerant systems through interference of two copies of a many-body state. We directly measure quantum purity, second order Rényi entropy and mutual information for Bose-Hubbard systems and observe the emergence of spatial entanglement across the superfluid-insulator transition.
In a more general context, many-body interference can be used to experimentally verify that quantum states are pure. We use our newly developed techniques to explore the evolution of quenched, isolated systems, where thermal ensembles appear to emerge within the subsytems of pure manybody states.
报告人简介： EDUCATION:
Harvard University, Cambridge, MA, USA,
PhD in Physics Mar 2016
University of Cambridge, Cambridge, United Kingdom,
Master of Natural Sciences in Experimental and Theoretical Physics Jun 2010
RESEARCH
Apr 2016-present, University of Heidelberg, Heidelberg, Germany
Postdoctoral research fellow in the group of Prof Selim Jochim
Few-particle systems of ultracold fermions Fermions in optical lattices
Aug 2010-Mar 2016, Harvard University, Cambridge, MA, USA
PhD Thesis with Prof M. Greiner
Microscopic studies of ultracold atomic gases in optical lattices, Dynamics of
strongly correlated systems Oct 2009-May 2010, University of Cambridge, Cambridge, UK
Masters Thesis with Dr M. Atature
Atomic, Mesoscopic and Optical Physics group
Optical properties of semiconductor quantum dots in electric and magnetic
fields Publication:
A. M. Kaufman, M. E. Tai, A. Lukin, M. Rispoli, R. Schittko, Philipp Preiss, and M. Greiner: Quantum thermalization through entanglement in an isolated many-body system, Science, accepted (2016)
P. Zupancic, Philipp Preiss, R. Ma, A. Lukin, M. E, Tai, M. Rispoli, R. Islam, and M. Greiner: Ultra-precise holographic beam shaping for microscopic quantum control, Opt. Express, 24, 13881 (2016)
R. Islam, R. Ma, Philipp Preiss, M.E. Tai, A. Lukin, M. Rispoli, and M. Greiner: Measuring entanglement entropy in a quantum many-body system, Nature, 528, 77 (2015)
Philipp Preiss, R. Ma, M.E. Tai, A. Lukin, M. Rispoli, P. Zupancic, Y. Lahini, R. Islam, and M. Greiner: Strongly correlated quantum walks in optical lattices, Science, 347, 1229 (2015)
Philipp Preiss, R. Ma, M.E. Tai, J. Simon, and M. Greiner: Quantum gas microscopy with spin, atom-number and multi-layer readout, Phys. Rev. A 91, 041602(R) (2015)
W. Bakr, Philipp Preiss, M.E. Tai, R. Ma, J. Simon, and M. Greiner: Orbital excitation blockade and algorithmic cooling in quantum gases, Nature 480, 500 (2011)
R. Ma, M.E. Tai, Philipp Preiss, W. Bakr, J. Simon, and M. Greiner: Photon-assisted tunneling in a biased strongly correlated bose gas, Phys. Rev. Lett 107, 095301 (2011)
J. Simon, W. Bakr, R. Ma, M.E. Tai, Philipp Preiss, and M. Greiner: Quantum simulation of antiferromagnetic spin chains in an optical lattice, Nature 472, 307 (2011) |
