BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN PRODID:UW-Madison-Physics-Events BEGIN:VEVENT SEQUENCE:0 UID:UW-Physics-Event-4403 DTSTART:20170119T180000Z DURATION:PT1H0M0S DTSTAMP:20260419T060459Z LAST-MODIFIED:20170110T135841Z LOCATION:5310 Chamberlin Hall SUMMARY:Quantum entanglement for precision sensing with atoms and ligh t\, Atomic Physics Seminar\, Onur Hosten\, stanford DESCRIPTION:In the last decades\, advances in the level of precision i n controlling atomic and optical systems opened up the low-energy prec ision frontier to fundamental physics tests in addition to yielding ne w applied sensing technologies. In this talk I will focus on our exper iments with cold atoms highlighting some of the most recent developmen ts in the prospect of using quantum entanglement to further improve th e precision of atomic and optical sensors.
\nI will describe the g eneration of 20dB spin-squeezed states of half a million 87Rb atoms in side of an optical cavity. From a practical point of view\, the genera ted states enable up to a 100-fold reduction in required averaging tim es or atom numbers to achieve a given precision. I will explain the im plementation of an atomic clock operating 10 dB beyond the standard qu antum limit as well as the investigations of entanglement and Bell cor relations in this system. I will then describe the demonstration of a new concept we call quantum phase magnification which utilizes optical cavity-aided interactions between atoms to magnify signals to-be-meas ured. This technique eliminates the need for low noise detection to ac hieve phase sensitivities beyond the standard quantum limit. I will co nclude with future visions. URL:https://www.physics.wisc.edu/events/?id=4403 END:VEVENT END:VCALENDAR