Open quantum system description of singlet-triplet qubits in quantum dots
Abstract
We develop a theoretical model to describe the dissipative dynamics of singlet-triplet qubits in GaAs quantum dots. Using the concurrence experimentally obtained [M. D. Shulman et al., Science 336, 202 (2012)] as a guide, we found that each logical qubit fluctuates under the action of a random telegraph noise (RTN) that simulates the noise. We also study the dynamics of concurrence as a function of the amplitude of the RTN, the correlation time of the RTN, the preparation time of states, and the two-qubit coupling. Furthermore, we show that the two-qubit coupling together with the preparation time strongly affect the entanglement dissipative dynamics and both physical quantities can be employed to enhance the entanglement between singlet-triplet qubits.
Keywords
Cite
@article{arxiv.1701.03169,
title = {Open quantum system description of singlet-triplet qubits in quantum dots},
author = {L. K. Castelano and F. F. Fanchini and K. Berrada},
journal= {arXiv preprint arXiv:1701.03169},
year = {2017}
}
Comments
5 pages, 6 figures. Very close to the published version. arXiv admin note: substantial text overlap with arXiv:1503.08673