Silicon Isotope Quantum Computing

Satoru Miyamoto, Usami Noritaka, Kohei M. Itoh

Alexander A. Berezin

Anthony J. Sigillito, James C. Loy, D. M. Zajac +3 more

Kohei M. Itoh, Hideyuki Watanabe

Abstract Some of the stable isotopes of silicon and carbon have zero nuclear spin, whereas many of the other elements that constitute semiconductors consist entirely of stable isotopes that have nuclear spins. Silicon and diamond crystals composed of nuclear-spin-free stable isotopes (28Si,30Si, or12C) are considered to be ideal host matrixes to place spin quantum bits (qubits) for quantum-computing and -sensing applications, because their coherent properties are not disrupted thanks to the absence of host nuclear spins. The present paper describes the state-of-the-art and future perspective of silicon and diamond isotope engineering for development of quantum information-processing devices.

Robert W. Keyes

There is considerable interest in the use of silicon devices as qubits for quantum computing. The existence of nuclear spin in a silicon isotope and the complex band structure of silicon are unfavourable for this application of silicon devices.