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Events on Thursday, June 2nd, 2016

High Energy Seminar
US CMS Phase 2 Trigger Workshop
Time: 8:30 am
Place: 4274 Chamberlin Hall
Abstract: The purpose of this workshop will be to start to assemble the US CMS HL-LHC Upgrade R&D and construction trigger projects for both the NSF PDR and the DOE CD-1 Reviews. Several members of the US CMS Phase 2 Trigger program were unable to attend the Notre Dame Meeting, so this workshop will also fulfill some of the goals this would have covered. The workshop will focus on the US responsibilities for the Tracking, Calorimeter, Correlator and Muon Triggers and the interfaces of the latter three to the tracking trigger and calorimeter and muon trigger primitive generation as well as heavy ion trigger needs.
Host: Wesley Smith
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R. G. Herb Condensed Matter Seminar
Prototyping Extensible Quantum Computing Architectures
Time: 10:00 am
Place: 5310 Chamberlin
Speaker: Prof. Matteo Mariantoni, U. Waterloo and the Institute for Quantum Computing
Quantum computing architectures with ten or more quantum bits (qubits) have been implemented using trapped ions and superconducting devices. The next milestone in the quest for a quantum computer is the realization of quantum error correction codes. Such codes will require a very large number of qubits that must be controlled and measured by means of classical electronics. One architectural aspect requiring immediate attention is the realization of a suitable interconnect between the quantum and classical hardware. In this talk, I will introduce the quantum socket, a three-dimensional wiring method for qubits with superior performance as compared to two-dimensional methods based on wire bonding. The quantum socket is based on spring-mounted micro wires – the three-dimensional wires – that connect electrically to a micro-fabricated chip by pushing directly on it. The wires have a coaxial geometry and operate well over a frequency range from DC to 10 GHz. I will present a detailed characterization of the quantum socket, with emphasis on generalized time-domain reflectometry, a new signal integrity tool developed in my lab. As a proof of concept for quantum computing applications, I will show a series of experiments where a quantum socket was used to measure superconducting resonators at a temperature of ~10 mK. I will also show preliminary results where a socket was used to characterize resonators fabricated from molecular beam epitaxy aluminum films on gallium arsenide substrates. In conclusion, I will give an outlook demonstrating how the quantum socket can be used to wire a quantum processor with a 10 × 10 qubit lattice and I will outline our present work toward the implementation of such a lattice.
Host: McDermott
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