Emergent SU(2) dynamics and perfect quantum many-body scars

S. Choi, C.J. Turner, H. Pichler, W.W. Ho, A. Michailidis, Z. Papić, M. Serbyn, M.D. Lukin, D.A. Abanin, Physical Review Letters 122 (2019) 220603.


Journal Article | Published | English
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Abstract
Motivated by recent experimental observations of coherent many-body revivals in a constrained Rydbergatom chain, we construct a weak quasilocal deformation of the Rydberg-blockaded Hamiltonian, whichmakes the revivals virtually perfect. Our analysis suggests the existence of an underlying nonintegrableHamiltonian which supports an emergent SU(2)-spin dynamics within a small subspace of the many-bodyHilbert space. We show that such perfect dynamics necessitates the existence of atypical, nonergodicenergy eigenstates—quantum many-body scars. Furthermore, using these insights, we construct a toymodel that hosts exact quantum many-body scars, providing an intuitive explanation of their origin. Ourresults offer specific routes to enhancing coherent many-body revivals and provide a step towardestablishing the stability of quantum many-body scars in the thermodynamic limit.
Publishing Year
Date Published
2019-06-07
Journal Title
Physical Review Letters
Volume
122
Issue
22
Article Number
220603
ISSN
eISSN
IST-REx-ID

Cite this

Choi S, Turner CJ, Pichler H, et al. Emergent SU(2) dynamics and perfect quantum many-body scars. Physical Review Letters. 2019;122(22):220603. doi:10.1103/PhysRevLett.122.220603
Choi, S., Turner, C. J., Pichler, H., Ho, W. W., Michailidis, A., Papić, Z., … Abanin, D. A. (2019). Emergent SU(2) dynamics and perfect quantum many-body scars. Physical Review Letters, 122(22), 220603. https://doi.org/10.1103/PhysRevLett.122.220603
Choi, Soonwon, Christopher J. Turner, Hannes Pichler, Wen Wei Ho, Alexios Michailidis, Zlatko Papić, Maksym Serbyn, Mikhail D. Lukin, and Dmitry A. Abanin. “Emergent SU(2) Dynamics and Perfect Quantum Many-Body Scars.” Physical Review Letters 122, no. 22 (2019): 220603. https://doi.org/10.1103/PhysRevLett.122.220603.
S. Choi et al., “Emergent SU(2) dynamics and perfect quantum many-body scars,” Physical Review Letters, vol. 122, no. 22, p. 220603, 2019.
Choi S, Turner CJ, Pichler H, Ho WW, Michailidis A, Papić Z, Serbyn M, Lukin MD, Abanin DA. 2019. Emergent SU(2) dynamics and perfect quantum many-body scars. Physical Review Letters. 122(22), 220603.
Choi, Soonwon, et al. “Emergent SU(2) Dynamics and Perfect Quantum Many-Body Scars.” Physical Review Letters, vol. 122, no. 22, APS Physics, 2019, p. 220603, doi:10.1103/PhysRevLett.122.220603.

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