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Atomic Physics Seminars
Atomic
Monday, October 21, 2019
4:00 PM
Physics Building, Room 204

Dmitry Green
[Host: Peter Schauss]
AppliedTQC.com, ResearchPULSE LLC
"Path to building quantum spin liquids and topological qubits within existing quantum hardware"
Slideshow (PDF)

ABSTRACT:
We address a central problem in the creation and manipulation of quantum states: how to build topological quantum spin liquids with physically accessible interactions. Theorists have been studying models of quantum spin liquids that rely on "multispin" interactions since the 1970s, and, more recently, have realized that these models can be used for quantum computing. However, nature does not provide such interactions in real materials. We construct a lattice gauge model where the required, fully quantum, multispin interactions can in fact be emulated exactly in any system with only twobody Ising interactions plus a uniform transverse field. The latter systems do exist. Therefore, our solution is an alternative path to building a workable topological quantum computer within existing hardware. Our bottomup construction is generalizable to other gaugelike theories, including those with fractonic topological order such as the Xcube model. Taken as a whole, our approach is a blueprint to emulate topologically ordered quantum spin liquids in programmable quantum machines.

SLIDESHOW:




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