Quantum information in solid-state systems

Y. Yamamoto

Wonmin Son, Vlatko Vedral

Erika Hissong

Control and coupling of individual quantum systems remains an important research area in experimental quantum information. Single quantum systems in the solid state offer many attractive properties in terms of isolation and control: strong interaction due to close proximity, and scalability using mature fabrication techniques. Similar to atoms, many solid state quantum systems can couple to photons, offering potential for long-range interaction. Two such candidate systems are the nitrogen vacancy center in diamond, and the nanowire semiconductor quantum dot. These systems can act like isolated atoms in a solid state system, and can serve as sources of indistinguishable photons. This report discusses low temperature excitation of these systems, a regime in which the spectral properties are desirable for applications in quantum information, such as long-distance entanglement.

Serghey V. Vonsovsky, Mikhail I. Katsnelson

B. Ruggiero, Per Delsing, C. Granata +2 more

Chen Dong

Quantum information processing and quantum computation pose grand challenges for basic and applied science in this century.Creating scalable quantum systems is essential for the realization of practical quantum computing.Solid state quantum systems that can be produced with micro/nano fabrication technologies should offer better scalability.Strong coupling of the solid state system to the environment,however,makes decoherence of an otherwise pure quantum state a much more serious problem to be overcome.This is a new field that is open for conceptual breakthroughs and technology innovation.This article is a brief account of the recent developments using spin,cold atoms,quantum dots,and other functional materials as new quantum information carriers for quantum manipulation experiments in the Solid State Quantum Information Processing Laboratory in the Institute of Physics,Chinese Academy of Sciences.