Strongly correlated quantum walks in optical lattices

Full control over the dynamics of interacting, indistinguishable quantum particles is an important prerequisite for the experimental study of strongly correlated quantum matter and the implementation of high-fidelity quantum information processing. We demonstrate such control over the quantum walk—t...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2015-03, Vol.347 (6227), p.1229-1233
Main Authors: Preiss, Philipp M., Ma, Ruichao, Tai, M. Eric, Lukin, Alexander, Rispoli, Matthew, Zupancic, Philip, Lahini, Yoav, Islam, Rajibul, Greiner, Markus
Format: Article
Language:English
Subjects:
Atomic properties
Correlation
Dynamic tests
Dynamical systems
Dynamics
Emergence
Information Processing
Optical lattices
Quantum physics
Random walk theory
Sailors
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Summary:Full control over the dynamics of interacting, indistinguishable quantum particles is an important prerequisite for the experimental study of strongly correlated quantum matter and the implementation of high-fidelity quantum information processing. We demonstrate such control over the quantum walk—the quantum mechanical analog of the classical random walk—in the regime where dynamics are dominated by interparticle interactions. Using interacting bosonic atoms in an optical lattice, we directly observed fundamental effects such as the emergence of correlations in two-particle quantum walks, as well as strongly correlated Bloch oscillations in tilted optical lattices. Our approach can be scaled to larger systems, greatly extending the class of problems accessible via quantum walks.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1260364