Dear colleagues, this week we are happy to have Rajibul Islam from the Greiner group at our seminar, speaking about their very recent work on entanglement. Kind regards, Richard and Swati ITAMP Topical Lunch Discussion Date: Friday, March 27th Time: 12:00-1:30 pm Pizza will be served. Location: B-106 @ Center for Astrophysics (60 Garden Street) Directions: after entering the lobby of the CfA, turn right to enter the hallway of the B building. In the hallway, turn right again, and B-106 is there. Speaker: K. Rajibul Islam, Harvard University Title: Entanglement detection by interfering quantum many-body twins Abstract: Entanglement is a hallmark of quantum many-body physics, and is increasingly used to explore long range correlations near quantum phase transitions, and topological order. Detecting entanglement, however, is hard as it often requires a full reconstruction of the state of the system or a prior knowledge about the state itself. In our experiments with bosonic ultra cold atoms, we detect entanglement by comparing the quantum states of two identically prepared copies of a few-body system. This is achieved by bosonic interference between the copies, similar to the two photon Hong-Ou-Mandel interference. We directly measure the second order Renyi entanglement entropy in the ground state of an interacting few-body system, and observe entanglement dynamics in a quench experiment. --------------------------- Dr. Richard Schmidt Institute for Theoretical Atomic, Molecular, and Optical Physics (ITAMP) Harvard-Smithsonian Center for Astrophysics MS-14 60 Garden St. Cambridge, MA 02138 U.S.A. richard.schmidt(a)cfa.harvard.edu Tel. +1 (617) 496-7610 Fax +1 (617) 496-7668