Appropriate for physicists Appropriate for all lab staff and members of the public
|Jan. 10, 2024
|Jan. 17, 2024
|Jan. 24, 2024
|Generation, Detection and Application of Twisted Waves of Light and Neutrons
|Charles Clark, Joint Quantum Institute, National Institute of Standards and Technology and University of Maryland
|Doğa M. Kürkçüoğlu
|Dislocations in wave trains were manifest in the 1830s studies of ocean tides by William Whewell, who discovered “amphidromic points” in the sea, where there is no tidal motion. John Nye and Michael Berry’s 1970s investigations, of fine structure in radio echoes from the bottom of the Antarctic ice sheet, revealed wavefront dislocation as a generic phenomenon. It became a broad field of science in the 1990s, when “orbital angular momentum states” of light were produced, followed by similar realizations in beams of atoms, molecules. x-rays, electrons and neutrons. Robert R. Wilson's “Tractricious” sculpture at Fermilab provides a good framework for visualizing the unity of these phenomena.
|Jan. 31, 2024
|Feb. 7, 2024
|Muon Colliders –The hard part
|Robert B Palmer, BNL (Emeritus}
|If you can build a Muon Collider and do physics with it, that is great. But can you? Much of what is needed has been simulated on paper but still requires a lot of engineering and demonstration to know if they are buildable. For a few parts, like the final stages of emittance cooling, we do not even have even a paper solution. I will discuss this and other challenges. What sort of effort is needed?
|Feb. 14, 2024
|Quantum computing with neutral ytterbium atoms
|Jeff Thompson, Princeton University
|Neutral atom quantum computing is a rapidly developing field. Exploring new atomic species, such as alkaline earth atoms, provides additional opportunities for cooling and trapping, measurement, qubit manipulation, high-fidelity gates and quantum error correction. In this talk, I will present recent results from our group on implementing high-fidelity gates on nuclear spins encoded in metastable 171Yb atoms, including mid-circuit detection of gate errors that give rise to leakage out of the qubit space, using erasure conversion. I will conclude by discussing ongoing experiments on quantum error correction and reaching very high gate fidelities, and the important role of real-time FPGA control electronics developed by Fermilab in reaching these goals.
|Feb. 21, 2024
|Feb. 28, 2024