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Multidimensional Quantum Walks

Date & Time

June 12, 2023, 3:00pm

Where to Attend

ATL 3100A



Sebastian ZurCWI

Event Type

QuICS Special Seminar

Abstract: While quantum walk frameworks make it easy to design quantum algorithms, as evidenced by their wide application across domains, the major drawback is that they can achieve at most a quadratic speedup over the best classical algorithm.  In this work, we generalise the electric network framework – the most general of quantum walk frameworks, into a new framework that we call the multidimensional quantum walk framework, which no longer suffers from the aforementioned drawback, while still maintaining the original classical walk intuition. We then apply this framework to the k-distinctness problem, to obtain a time complexity that matches the currently best known query complexity by Belovs(2012), as well as to the welded trees problem, where we can solve the problem in a linear number of queries.

This talk will focus on the application to welded trees.

Joint work with Stacey Jeffery (2208.13492)

*We strongly encourage attendees to use their full name (and if possible, their UMD credentials) to join the zoom session.*