Northwestern Events Calendar


Special Colloquium: Quantum information processing using multimode circuit-QED

When: Wednesday, March 11, 2020
4:00 PM - 5:00 PM Central

Where: Technological Institute, F160, 2145 Sheridan Road, Evanston, IL 60208 map it

Audience: Faculty/Staff - Student - Public - Post Docs/Docs - Graduate Students

Contact: Yas Shemirani   (847) 491-3644

Group: Physics and Astronomy Special Events and Invited Talks

Category: Academic


Superconducting circuits have emerged as one of the most promising platforms for quantum computation as a result of rapid advances in coherence and control over the past few decades. Most modern superconducting processors are based on the transmon circuit, and rely on nearest-neighbor interactions for gate operations and entanglement. In this talk, I will present an alternative architecture for superconducting quantum information and simulation, involving many harmonic modes of a multimode cavity coupled and controlled by a single transmon circuit. This multimode circuit-QED system leverages the long coherence times and restricted decoherence channels of superconducting microwave cavities. Additionally, the architecture has a high degree of connectivity while being hardware efficient, with gate operations performed between arbitrary pairs of cavity modes using only a few control lines that drive the transmon. Our implementation of such a processor uses - the quantum flute, a novel rectangular 3D multimode cavity with a tailored mode dispersion, that is protected from seam loss and possesses O(10) distinct modes with photon lifetimes approaching a millisecond. I will present various schemes for universal control of the multimode Hilbert space using the dispersively coupled transmon, and discuss schemes for engineering designer photon-photon interactions. 


Seminar Speaker: Srivatsan Chakram, University of Chicago

Keywords: Physics, Astronomy, Seminar, Colloquium

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