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Tweezer-programmable 2D quantum walks in a Hubbard-regime lattice

Journal Article · · Science
 [1];  [1];  [1];  [2];  [1]
  1. JILA, University of Colorado and National Institute of Standards and Technology, and Department of Physics, University of Colorado, Boulder, CO 80309, USA.
  2. Department of Computer Science, University of Maryland, College Park, MD 20742, USA.; Institute for Advanced Computer Studies and Joint Center for Quantum Information and Computer Science, University of Maryland, College Park, MD 20742, USA.

Quantum walks provide a framework for designing quantum algorithms that is both intuitive and universal. To leverage the computational power of these walks, it is important to be able to programmably modify the graph a walker traverses while maintaining coherence. We do this by combining the fast, programmable control provided by optical tweezers with the scalable, homogeneous environment of an optical lattice. With these tools we study continuous-time quantum walks of single atoms on a square lattice and perform proof-of-principle demonstrations of spatial search with these walks. When scaled to more particles, the capabilities demonstrated can be extended to study a variety of problems in quantum information science, including performing more effective versions of spatial search using a larger graph with increased connectivity.

Research Organization:
US Department of Energy (USDOE), Washington, DC (United States). Office of Science, Advanced Scientific Computing Research (ASCR)
Sponsoring Organization:
USDOE
OSTI ID:
1982961
Journal Information:
Science, Vol. 377, Issue 6608; ISSN 0036-8075
Publisher:
AAAS
Country of Publication:
United States
Language:
English

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