Complexity of controlling quantum many-body dynamics
Author(s)Caneva, T.; Silva, A.; Fazio, R.; Lloyd, Seth; Calarco, T.; Montangero, S.; ... Show more Show less
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We demonstrate that arbitrary time evolutions of many-body quantum systems can be reversed even in cases when only part of the Hamiltonian can be controlled. The reversed dynamics obtained via optimal control—contrary to standard time-reversal procedures—is extremely robust to external sources of noise. We provide a lower bound on the control complexity of a many-body quantum dynamics in terms of the dimension of the manifold supporting it, elucidating the role played by integrability in this context.
DepartmentMassachusetts Institute of Technology. Department of Mechanical Engineering
Physical Review A
American Physical Society
Caneva, T., A. Silva, R. Fazio, S. Lloyd, T. Calarco, and S. Montangero. “Complexity of Controlling Quantum Many-Body Dynamics.” Phys. Rev. A 89, no. 4 (April 2014). ©2014 American Physical Society.
Final published version