# Events Archive

AMO Seminar - Iannis Kominis, local visitor from the University of Crete - A Bird's Eye View of Spin Coherence
Tue, Feb 14, 2012, 2:00 pm3:00 pm
Radical-ion pair reactions play a fundamental role in photosynthesis and are also understood to underlie the avian magnetic compass mechanism. It was recently shown that these biochemical reactions exhibit a host of quantum coherence phenomena, thus providing a promising and very exciting link between biological systems and quantum…
AMO Seminar - Wes Campbell, University of Maryland - Quantum information science with cold ions and molecules
Thu, Feb 9, 2012, 1:30 pm3:00 pm
We use a collection of trapped atomic ions as a platform for the analog quantum simulation of lattice spin models. By applying spin-dependent optical dipole forces to an ion crystal, a long-range effective spin-spin interaction arises that allows the simulation of spin Hamiltonians that possess nontrivial order in their ground state. The use…
AMO Seminar - Monika Schleier-Smith - A Squeezed Atomic Clock Enabled by Cavity Feedback - Quantum Many-Body Systems Division LMU Munich
Mon, Jan 23, 2012, 2:00 pm3:30 pm
Over a decade ago, the stability of atomic clocks reached the standard quantum limit, set by the projection noise inherent in measurements on an ensemble of uncorrelated particles. In a proof of-principle experiment, we have now demonstrated a clock that surpasses this limit by operating with atoms in a particular type of entangled state called…
AMO Seminar - Building Synthetic Materials from Ultracold Atoms: Quantum Magnetism in an Optical Lattice - Jonathan Simon - Harvard/MIT
Thu, Jan 19, 2012, 1:30 pm3:00 pm
Ultracold atoms in optical lattices form a unique testbed for quantum many-body physics. Using such systems it has recently become possible to engineer strongly-correlated materials from the ground up and probe them with single-atom resolution. I will describe experiments in which we have synthesized the first magnetic material composed of…
AMO Seminar - Quantum phenomena in measurements of collective atomic motion and spin - Nathaniel Brahms - U. of California, Berkeley
Thu, Jan 12, 2012, 1:30 pm3:00 pm
We typically think of quantum physics as applying to the motion of atom-scale objects. Advances in atomic and device physics are now letting us access quantum phenomena in the collective motion of objects composed of thousands to billions of atoms. In this talk, I will discuss recent results from our experiment at Berkeley, in which we use the…
Pinghan Chu
Fri, Feb 25, 2011, 12:00 pm1:00 pm
Speaker: Pinghan Chu Title: The Neutron EDM and the Dressed Spin Abstract: The search of the neutron electric dipole moment provides a very sensitive test of physics beyond the Standard Model(SM). The SM prediction for the nEDM is at the 10^−31 e cm level, below current experimental limit by five orders of magnitude. However, many…
Young Jin Kim
Fri, Feb 18, 2011, 12:00 pm1:00 pm
Speaker: Young Jin Kim at the Indiana University, Bloomington Title: An experimental search for the electron Electric Dipole Moment in Gadolinium Gallium Garnet Abstract: A discovery of a permanent electric dipole moment of the electron (eEDM) would provide crucial information about the nature of T-violation and imply new sources of CP…
Dong Sheng
Thu, Jan 20, 2011, 11:00 am12:00 pm
Speaker: Dong Sheng Title: Progress on the measurement of the francium anapole moment Abstract: I will present the current status of the experimental effort towards the measurement of the anapole moment in francium. The anapole moment is a parity violating, time-reversal conserving nuclear moment that arises from the weak interaction among…
Ofer Firstenberg
Fri, Oct 22, 2010, 12:30 pm1:30 pm
Speaker: Ofer Firstenberg Affiliation: Technion-Israel Institute of Technology Title: Diffusion and Diffraction of Polaritons in Atomic Media Abstract: We investigate the non-local optical response in a medium of diffusing atoms. The two-photon spectra exhibit motional broadening and narrowing features along with a cusp-like or…
Victor Acosta
Tue, Oct 19, 2010, 2:00 pm3:30 pm
Speaker: Victor Acosta Affiliation: Berkeley Title: Broadband, picotesla-scale magnetometry with diamond NV centers Abstract: TBA

[TESTING BY SSG] Marc Smiciklas, "A Determination of $\alpha$ Using Precision Measurements of Helium Fine Structure"
Tue, Aug 10, 2010, 3:30 pm4:00 pm
Recently published theoretical predictions by Pachucki and Yerokhin are in good agreement with the most precise measurements of helium fine structure and, for the first time, represent a complete calculation up to and including terms of order $\alpha^7$. In addition to serving as a test of this theory, more precise measurements could also yield…
A Determination of the Fine Structure Constant Using Precision Measurements of Helium Fine Structure
Tue, Aug 10, 2010, 1:00 pm2:00 pm

Recently published theoretical predictions by Pachucki and Yerokhin are in good agreement with the most precise measurements of helium fine structure and, for the first time, represent a complete calculation up to and including terms of order mÎ±7. In addition to serving as a test of this theory, more precise measurements could also yield…