Pickup at Cumberland House and travel to campus

• Adrian Del Maestro (University of Tennessee, Knoxville)

Meeting with UTK Physics & Astronomy Faculty

• Adrian Del Maestro (University of Tennessee, Knoxville)

Room: 403

Meeting with UTK Physics & Astronomy Faculty

• Michael Guidry

Meeting with UTK Physics & Astronomy Faculty Room: 604 Email and Work time

Meeting with UTK Physics & Astronomy Faculty Room: 202 Dien Nguyen

Meeting with UTK Physics & Astronomy Faculty Rpbert Grzywacz

Lunch

• Adrian Del Maestro (University of Tennessee, Knoxville)

Meeting with UTK Physics & Astronomy Faculty

• Wonhee Ko (University of Tennessee, Knoxville)

Room: 203

Meeting with UTK Physics & Astronomy Faculty

• Lucas Platter

Room: 104

Meeting with UTK Physics & Astronomy Faculty

• Kostya Nasyedkin (ORNL)

Room: 604

Pre-Colloquium Reception Room: 3rd Floor Atrium

Colloquium: Sensing Gravitational Waves and Dark Matter with Superfluid Helium

• John Davis (Univ. Alberta)

Room: 307 Observations spanning multiple astronomical scales point to the existence of an unknown form of matter, dubbed “dark matter”, that constitutes over 85% of the mass of most galaxies. Recent theoretical insights into the possible nature of dark matter and how it interacts with normal matter have inspired a wide range of experimental efforts aimed at directly detecting dark matter. As part of this effort, we are developing a small-scale experiment to search for multiple well-motivated “ultralight” dark matter candidates, placing stronger bounds than are currently possible with high-cost and/or large-scale efforts. The core enabling technology relies on microwave cavity readout of mechanical motion in superfluid helium. I will tell you about the experiments that have led up to where we are now, and our current efforts with regards to this table-top dark matter search.

Pickup at Hotel and Travel to IAMM

• Adrian Del Maestro (University of Tennessee, Knoxville)

Research Discussion

Research Discussion -Alan Tennant IAMM 309

• Alan Tennant

Research Discussion

• Adrian Del Maestro (University of Tennessee, Knoxville)

Room: 321

Research Discussion

• Adrian Del Maestro (University of Tennessee, Knoxville)

Room: 321

Research Discussion

• Tony Mezzacappa

Room: 300

Zero Point Cryogenics

• John Davis (Univ. Alberta)

Room: 310 In general, quantum technologies must be operated in the sub 1 K regime, a demanding area of cryogenics. In fact, the technologies to reach below 1 K with continuous operation are few and far between, and therefore the dilution refrigerator, capable of continuous operation in the mK regime is often the preferred choice. I will begin by reviewing the principles of operation of a dilution refrigerator, and tell you about some of the advances in dilution refrigerator technology that we have made at Zero Point Cryogenics. Following this, I will describe our new, patent-pending technology that we call the phase separation refrigerator. It allows continuous operation below 500 mK, with very fast start-up and minimal 3He usage. We believe this will find significant applications in the future of quantum technologies.

Research Discussion

• Yang Zhang

Room: 257

Research Discussion

• Wonhee Ko (University of Tennessee, Knoxville)

Room: G007 ULT-STM Lab tour

Depart for Airport