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Optimal Control at the Quantum Speed Limit

Mon, 2011-02-14 19:40 - Daniel Rudolph
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Date: 
2009-12-07
Author(s): 

T. Caneva, M. Murphy, T. Calarco, R. Fazio, S. Montangero, V. Giovannetti, and G. E. Santoro

Reference: 

Phys. Rev. Lett. 103, 240501 (2009)

URL: 

http://link.aps.org/doi/10.1103/PhysRevLett.103.240501

Optimal control theory is a promising candidate for a drastic improvement of the performance of quantum information tasks. We explore its ultimate limit in paradigmatic cases, and demonstrate that it coincides with the maximum speed limit allowed by quantum evolution.