Quantum Information Storage for over 180 s Using Donor Spins in a 28 Si “Semiconductor Vacuum”

• DOI: 10.1126/science.1217635
• Publication Date: 2012-06-07T18:12:19Z
• Authors: M. Steger; K. Saeedi; M. L. W. Thewalt; J. J. L. Morton; H. Riemann; N. V. Abrosimov; P. Becker; H.-J. Pohl
• Keywords: 0103 physical sciences; 01 natural sciences

Extending Quantum Memory Practical applications in quantum communication and computation require the building blocks—quantum bits memory—to be sufficiently robust long-lived to allow for manipulation storage (see Perspective by Boehme McCarney ). Steger et al. (p. 1280 ) demonstrate that nuclear spins of 31 P impurities an almost isotopically pure sample 28 Si can have a coherence time as long 192 seconds at temperature ∼1.7 K. In diamond room temperature, Maurer 1283 show spin-based qubit system comprised isotopic impurity ( 13 C) vicinity color defect (a nitrogen-vacancy center) could manipulated exceeding one second. Such lifetimes promise make architectures feasible blocks information science.