Infrared spectroscopy is an essential tool for probing molecular structure and dynamics. Over the last decade, cavity-enhanced direct frequency comb spectroscopy (CE-DFCS) has emerged as a powerful technique for molecular spectroscopy in the mid-infrared region (3-15 um). CE-DFCS combines the broad spectral bandwidth and high frequency resolution of frequency combs with the improved detection sensivity provided by high-finesse optical cavities.
You are invited to a reception and talk for Monika Ritsch-Marte on Thurs, July 18th at 3:30 pm in the h-bar. Please join us to welcome Prof. Ritsch-Marte.
3:30 reception in h-bar
4:00 talk in X317
Computer-generated holography for optical trapping and imaging
Division for Biomedical Physics, Medical University of Innsbruck, Austria
Please join us for a Responsible Conduct of Research (RCR) Seminar! The National Science Foundation has instituted a Responsible Conduct of Research policy that must be followed by every person who participants in an NSF grant or center. JILA’s two NSF Centers—the Physics Frontier Center and the STROBE Science & Technology Center— are hosting this seminar to discuss what RCR means at JILA, within all institutions involved in STROBE, and the greater scientific community. This seminar will answer questions such as: What is RCR policy? What is research misconduct?
Genuinely quantum states of light can be distinguished via the criterion proposed in the 1960s by Glauber and Sudarshan: so-called classical states in optics are those obtained as probabilistic mixtures of coherent states. Any other state is called nonclassical and has the potential to be a resource for quantum-enhanced information processing.
Searching for time-reversal symmetry with molecular ions: quantum state control and photofragment imaging
The relative abundance of matter over antimatter in the observable universe cannot be accounted for by the Standard Model of particle physics (SM), and requires additional sources of time-reversal symmetry violation to be explained. Theories seeking to explain this imbalance generically predict electric dipole moments of fundamental particles such as the electron. I will describe an ongoing search for the electron's electric dipole moment using trapped molecular ions.
Trapped ion qubits are one of the most promising candidates for scalable quantum computing. Entangling gates with trapped ions are typically performed in an adiabatic regime, where the motional frequencies of the ions in the trap limit the gate speed. Following  we use amplitude-shaped cw-pulses to perform entangling gates significantly faster than the speed limit for conventional gate mechanisms. At these gate speeds, the motional modes are not spectrally isolated, leading to entanglement with both motional modes sensitively depending on the optical phase of the control fields.
Non-equilibrium driven-dissipative systems, characterized by a fast external drive as well as a coupling to a dissipative bath, are not only relevant to a vast range of experimental platforms, but also pose fundamental questions about the nature of non-equilibrium states and dynamics. In this talk, I give an overview of such systems, and will argue that an effective thermal behavior often emerges in these systems. Nevertheless, I will discuss a driven-dissipative system of interacting bosons that exhibits remarkable nonequilibrium (i.e., non-thermal) behavior.
Reception in h-bar (next to X317) at 3:30 pm
Topology of the Rashba model (Experiment) and quantum gases with weak measurement and classical feedback (Theory)
(1) We experimentally realized Rashba spin–orbit with 87-Rb in the F=1 ground state manifold by Raman coupling three `synthetic clocks states’ generated by a continuous dynamical decoupling scheme. We use Fourier transform spectroscopy to directly reveal the Dirac point and construct a three-arm Ramsey interferometer to read out the associated singular Berrys curvature.