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October 2018

Physics Colloquium – “Thunderstorm Electrification, Lightning Flash Rates, and the RELAMPAGO Field Campaign”

October 23 @ 4:00 pm
Berthoud Hall, 1516 Illinois St.
Golden, CO 80401 United States
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Robert A. Marshall University of Colorado @ Boulder Ann & HJ Smead Department of Aerospace Engineering Sciences Abstract:  Severe thunderstorms that produce intense lightning, large hail, heavy precipitation, strong winds, or tornadoes are a significant public safety hazard and can also cause costly property damage. However, our understanding of the processes that lead to such severe weather is incomplete, including processes related to its pre-initiation, initiation, and subsequent convective development including growth and decay stages. This includes processes that control…

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Physics Colloquium – “Isotopically Enhanced Triple-Dot Qubits in SiGe”

October 30 @ 4:00 pm
Berthoud Hall, 1516 Illinois St.
Golden, CO 80401 United States
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Andrew Hunter HRL Laboratories, LLC Abstract:  Qubits based on silicon offer the promise of low magnetic noise due to isotopic enhancement and the availability of existing silicon growth and fabrication processes. Triple-dot qubits provide exchange-only spin-qubit control, enabling operation using only gate voltages. The main impediments to silicon qubits are charge noise, valley degeneracy, and nuclear magnetism. In this talk, I will summarize our recent results characterizing performance of lithographically defined Si/SiGe triple quantum-dot devices , made with isotopically enriched…

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November 2018

Physics Colloquium – “Superconducting Radiation Detectors and Nuclear Clocks”

November 6 @ 4:00 pm
Berthoud Hall, 1516 Illinois St.
Golden, CO 80401 United States
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Stephan Friedrich Team Leader, Cryogenic Detector Team Nuclear and Chemical Sciences Division Lawrence Livermore National Laboratory Abstract:  The desire to build nuclear clocks with an unprecedented accuracy of 1 part in 1019 is currently driving the interest in accurate measurements of the first excited nuclear state in 229Th, which lies only 7.8 ± 0.5 eV above the ground state and thus in the range of tunable lasers. Superconducting tunnel junction (STJ) radiation detectors operated at temperatures of ~0.1K have an…

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Physics Colloquium – title to be announced

November 13 @ 4:00 pm
Berthoud Hall, 1516 Illinois St.
Golden, CO 80401 United States
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Speaker and topic to be announced.   Berthoud Hall 241

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Physics Colloquium – title to be announced

November 20 @ 4:00 pm
Berthoud Hall, 1516 Illinois St.
Golden, CO 80401 United States
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Speaker and title to be announced.   Berthoud Hall 241

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PhysicsFest!! More details to follow…

November 27 @ 5:00 pm - 8:00 pm
CoorsTek Center for Applied Science and Engineering, 1523 Illinois St.
Golden, CO 80401 United States
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CoorsTek Atrium

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December 2018

Physics Colloquium – title to be announced

December 4 @ 4:00 pm
Berthoud Hall, 1516 Illinois St.
Golden, CO 80401 United States
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Speaker and topic to be announced.   Berthoud Hall 241

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