Quantum logic gates from time-dependent global magnetic field in a system with constant exchange
Abstract
We propose a method for implementation of an universal set of one- and two-quantum-bit gates for quantum computation in the system of two coupled electrons with constant non-diagonal exchange interaction. Suppression of the exchange interaction is offered to implement by all-the-time repetition of single spin rotations. Small g-factor difference of electrons allows to address qubits and to avoid strong magnetic field pulses. It is shown by means of numerical experiments that for implementation of one- and two-qubit operations it is sufficient to change the amplitude of the magnetic field within a few Gauss, introducing in a resonance one and then the other electron. To find the evolution of the two-qubit system, we use the algorithms of the optimal control theory.
Keywords
Cite
@article{arxiv.1501.06294,
title = {Quantum logic gates from time-dependent global magnetic field in a system with constant exchange},
author = {A. V. Nenashev and A. F. Zinovieva and A. V. Dvurechenskii and A. Yu. Gornov and T. S. Zarodnyuk},
journal= {arXiv preprint arXiv:1501.06294},
year = {2015}
}
Comments
10 pages, 9 figures