Quantum optimal control of the dissipative production of a maximally entangled state

Entanglement generation can be robust against certain types of noise in approaches that deliberately incorporate dissipation into the system dynamics. The presence of additional dissipation channels may, however, limit fidelity and speed of the process. Here we show how quantum optimal control techn...

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Bibliographic Details
Published in:New journal of physics 2018-12, Vol.20 (12), p.123010
Main Authors: Horn, Karl P, Reiter, Florentin, Lin, Yiheng, Leibfried, Dietrich, Koch, Christiane P
Format: Article
Language:English
Subjects:
Accuracy
Control theory
Entangled states
entanglement
Experiments
Laser beams
Lasers
Noise
open quantum systems
Optimal control
Optimization
Phase transitions
Physics
Polarization
Quantum entanglement
quantum optimal control
quantum reservoir engineering
Qubits (quantum computing)
System dynamics
trapped ions
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Summary:Entanglement generation can be robust against certain types of noise in approaches that deliberately incorporate dissipation into the system dynamics. The presence of additional dissipation channels may, however, limit fidelity and speed of the process. Here we show how quantum optimal control techniques can be used to both speed up the entanglement generation and increase the fidelity in a realistic setup, whilst respecting typical experimental limitations. For the example of entangling two trapped ion qubits (Lin et al 2013 Nature 504 415), we find an improved fidelity by simply optimizing the polarization of the laser beams utilized in the experiment. More significantly, an alternate combination of transitions between internal states of the ions, when combined with optimized polarization, enables faster entanglement and decreases the error by an order of magnitude.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/aaf360