Coherent Many-Body Spin Dynamics in a Long-Range Interacting Ising Chain

Coherent many-body quantum dynamics lies at the heart of quantum simulation and quantum computation. Both require coherent evolution in the exponentially large Hilbert space of an interacting many-body system. To date, trapped ions have defined the state of the art in terms of achievable coherence t...

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Bibliographic Details
Published in:Physical review. X 2017-12, Vol.7 (4), p.041063, Article 041063
Main Authors: Zeiher, Johannes, Choi, Jae-yoon, Rubio-Abadal, Antonio, Pohl, Thomas, van Bijnen, Rick, Bloch, Immanuel, Gross, Christian
Format: Article
Language:English
Subjects:
Annealing
Chains
Cold spinning
Cryptography
Evolution
Hilbert space
Ising model
Magnetization
Magnets
Optical coupling
Optical lattices
Optimization
Quantum chemistry
Quantum computers
Quantum computing
Rydberg states
Spin dynamics
Time measurement
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Summary:Coherent many-body quantum dynamics lies at the heart of quantum simulation and quantum computation. Both require coherent evolution in the exponentially large Hilbert space of an interacting many-body system. To date, trapped ions have defined the state of the art in terms of achievable coherence times in interacting spin chains. Here, we establish an alternative platform by reporting on the observation of coherent, fully interaction-driven quantum revivals of the magnetization in Rydberg-dressed Ising spin chains of atoms trapped in an optical lattice. We identify partial many-body revivals at up to about ten times the characteristic time scale set by the interactions. At the same time, single-site-resolved correlation measurements link the magnetization dynamics with interspin correlations appearing at different distances during the evolution. These results mark an enabling step towards the implementation of Rydberg-atom-based quantum annealers, quantum simulations of higher-dimensional complex magnetic Hamiltonians, and itinerant long-range interacting quantum matter.
ISSN:2160-3308
2160-3308
DOI:10.1103/PhysRevX.7.041063