Event Description
Timothy Hsieh, PhD
Research Faculty at the Perimeter Institute for Theoretical Physics
Long-range entangled quantum matter encompasses a wealth of fascinating phenomena including fractionalization and criticality. I will show how quantum dynamics involving measurements can both enable new kinds of long-range entangled states and facilitate their realization on quantum simulators. In the first part, I will illustrate how competing measurements along with unitary time evolution can give rise to distinct universality classes of non-equilibrium criticality. In the second part, I will show how measurements and unitary evolution conditioned on the measurement outcomes (“adaptive quantum circuits”) enable efficient preparation of long-range entangled matter. I will present three classes of protocols inspired by distinct physical insights, including tensor networks, renormalization, and partons. A large class of topological orders, including chiral topological order akin to fractional quantum Hall states, can be prepared in a time independent of system size, and critical states and non-abelian topological orders can be prepared in depth scaling logarithmically with system size.
Passcode: 660670
Biography:
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