Quantum speed limits under continuous quantum measurements

García-Pintos, Luis Pedro; del Campo, Adolfo

doi:10.1088/1367-2630/ab099e

Title: Quantum speed limits under continuous quantum measurements

Journal Article · Tue Mar 19 00:00:00 EDT 2019 · New Journal of Physics

DOI:https://doi.org/10.1088/1367-2630/ab099e· OSTI ID:1525831

García-Pintos, Luis Pedro ^[1]; del Campo, Adolfo ^[2]

Univ. of Massachusetts, Boston, MA (United States)
Univ. of Massachusetts, Boston, MA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The pace of evolution of physical systems is fundamentally constrained by quantum speed limits (QSL), which have found broad applications in quantum science and technology. We consider the speed of evolution for quantum systems undergoing stochastic dynamics due to continuous measurements. It is shown that that there are trajectories for which standard QSL are violated, and we provide estimates for the range of velocities in an ensemble of realizations of continuous measurement records. We determine the dispersion of the speed of evolution and characterize the full statistics of single trajectories. By characterizing the dispersion of the Bures angle, we further show that continuous quantum measurements induce Brownian dynamics in Hilbert space.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1525831

Report Number(s):: LA-UR-18-22866

Journal Information:: New Journal of Physics, Vol. 21, Issue 3; ISSN 1367-2630

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 30 works

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