6533b853fe1ef96bd12ac9e8

RESEARCH PRODUCT

Time-optimal control of the purification of a qubit in contact with a structured environment

J. FischerJ. FischerDaniel BasilewitschChristiane P. KochDominique SugnyDominique Sugny

subject

PhysicsSpeedupGeometric analysisStrong interactionQuantum PhysicsOptimal controlTime optimalTopology01 natural sciences010305 fluids & plasmasComputer Science::Emerging TechnologiesQubit0103 physical sciencesThermal010306 general physicsCoherence (physics)

description

We investigate the time-optimal control of the purification of a qubit interacting with a structured environment, consisting of a strongly coupled two-level defect in interaction with a thermal bath. On the basis of a geometric analysis, we show for weak and strong interaction strengths that the optimal control strategy corresponds to a qubit in resonance with the reservoir mode. We investigate under which conditions qubit coherence and correlation between the qubit and the environment can speed up the control process.

yearjournalcountryeditionlanguage
2019-03-11Physical Review A
https://doi.org/10.1103/physreva.99.033410