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Ivan Deutsch, University of New Mexico: “Neutral Atom Quantum Computing with Nuclear Spin Qudits“

  • 705, Pupin Hall 538 West 120th Street New York, NY, 10027 United States (map)

Individual atoms in free space are natural cariers of quantum information:  they are perfectly identical, well isolated from the environment, and easily controlled with optical and rf fields.   While trapped atomic ions have been a leading contender for quantum computing, their neutral cousins have been on the sidelines. This has changed dramatically in the last eight years due to advances in techniques for trapping in optical tweezer arrays and new approaches to creating high-fidelity entangling gates. Still there’s lots to do, with new opportunity for innovation.  In this talk I will consider the unique possibilities of quantum computing with qudits (with d>2 levels), by encoding in the nuclear spins of alkaline earth atoms, such as strontium-87, with d=10  Using quantum control one can implement a universal gate set, including single qudit SU(10) gates, and two-qudit entangling gates. Moreover, by encoding a qubit in a spin-cat qudit, one can design hardware efficient fault-tolerant error correcting codes, analogous to the cat-codes for bosons.  

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April 17

CANCELLED - Marcello Dalmonte, ICTP: “(Kolmogorov) complexity and the many-body problem - from classical statistical mechanics, to many-body wave functions”

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May 3

Jingjing Huang, North Carolina State University: “Energy-resolved spin correlation measurements: Decoding spin dynamics in weakly interacting Fermi gas“