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“From Rydberg spin-liquids to non-Abelian anyons in synthetic matter”

Date:

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Time:

Thursday, 13 Jan. 2022

Video-Recording for any system with MP4-support

- Video.mp4 (ca. 284 Mb)

15:15 – 16:15

Speaker today: Ashvin Vishwanath (Harvard University)

Abstract:

In contrast to ordered states such as ferromagnets or Bose Einstein condensates,

quantum systems can realize an entirely new form of emergence termed intrinsic

topological order (ITO). Examples include the fractional quantum Hall states

and spin liquids whose unique properties hold promise for fault-tolerant quantum

computing. However, ITOs are notoriously hard to realize experimentally.

For example, quantum spin liquids were proposed by Anderson in 1973 but remain

to be identified. Besides the tendency for systems to order, the lack of clear

experimental signatures makes detection challenging. In this talk, I will describe

our theoretical proposal to create ITO in synthetic matter platforms such as

Rydberg atom arrays, by leveraging their tunability. Further, I will outline ideas

for measuring non-local `string' correlations which characterize ITOs, and briefly

summarize the experimental progress towards these goals. Finally, I will describe

our ongoing exploration of new approaches to efficiently realize many kinds of ITOs,

including fractons and non-Abelian anyons in synthetic matter.

Brief CV

Ashvin Vishwanath is professor in physics at Harvard University.

He is elected member of the American Academy of Arts and Sciences.

He is recipient of Europhysics Prize, Simons Investigator Award,

Guggenheim Fellowship and APS Fellow.

He is currently serving as director of Simons Collaboration on Ultra Quantum Matter.