Events at Physics

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Events During the Week of July 2nd through July 9th, 2023

Monday, July 3rd, 2023

No events scheduled

Tuesday, July 4th, 2023

Academic Calendar
Independence Day
Abstract: *Note: actual end time may vary.* University offices closed. URL:
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Wednesday, July 5th, 2023

Wednesday Nite @ The Lab
IceCube detection of neutrinos from a galaxy near, near by
Time: 7:00 pm - 8:30 pm
Place: 1111 Genetics/Biotech or sign up for the zoom link at
Speaker: Justin Vandenbroucke, UW–Madison Physics / WIPAC
Abstract: The IceCube Neutrino Observatory is a detector monitoring a billion tons of ice at the South Pole for energetic signals from across the cosmos. Led by the University of Wisconsin – Madison, it detects neutrinos, which are nearly massless subatomic particles that can travel large distances straight through matter. Because of this, neutrinos serve as super X-rays, carrying new information that is complementary to astronomy done with any type of photons or electromagnetic waves. IceCube has previously detected neutrinos from distant galaxies powered by giant black holes. We have now detected neutrinos from our own Galaxy, the Milky Way. I will describe how IceCube works and what it has unveiled so far about both the distant Universe and our own cosmic neighborhood.
Host: Tom Zinnen
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Thursday, July 6th, 2023

Graduate Program Event
Preliminary Exam
Toward implementation of protected charge-parity qubits
Time: 11:00 am - 1:00 pm
Place: 5280 Chamberlin
Speaker: Abigail Shearrow, Department of Physics Graduate Student
Abstract: Topologically protected qubits are an area of growing interest and active research, with the potential for orders-of-magnitude improvements in coherence compared to conventional qubits. One such protected qubit is the charge-parity (C-parity) qubit, which consists of a pi-periodic Josephson element shunted by a large capacitance. Here, we implement imperfect pi-elements as "plaquettes" consisting of two arms in parallel, each arm incorporating a small-area Josephson junction in series with a large inductor. When the plaquette is biased at half a flux quantum, the first harmonic of the Josephson energy is suppressed and the second harmonic, which is proportional to cos(2φ), remains. While individual plaquettes are not protected, protection scales exponentially with the number of plaquettes concatenated in series. In this talk we describe the design, fabrication, and characterization of plaquette devices.
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Summer Recess
Time: 12:30 pm - 1:00 pm
Place: Bascom Hill outside Birge
Speaker: Sharon Kahn
Abstract: Come take a break and play from 12:30-1 on Bascom Hill (outside of Birge)! Some of us will be walking up, leaving from the Charter St entrance ~12:25 – feel free to walk with us!

Cornhole, ladder toss, frisbee, juice boxes. . . .
Hope you’ll join us!
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Friday, July 7th, 2023

No events scheduled