Coherent electron transport by adiabatic passage in an imperfect donor chain

R Rahman; RP Muller; JE Levy; MS Carroll; G Klimeck; AD Greentree; LCL Hollenberg

Journal article

Coherent electron transport by adiabatic passage in an imperfect donor chain

R Rahman, RP Muller, JE Levy, MS Carroll, G Klimeck, AD Greentree, LCL Hollenberg

Physical Review B Condensed Matter and Materials Physics | AMER PHYSICAL SOC | Published : 2010

DOI: 10.1103/PhysRevB.82.155315

Abstract

Coherent tunneling adiabatic passage (CTAP) has been proposed as a long-range physical quantum bits (qubit) transport mechanism in solid-state quantum computing architectures. Although the mechanism can be implemented in either a chain of quantum dots or donors, a one-dimensional chain of donors in Si is of particular interest due to the natural confining potential of donors that can, in principle, help reduce the gate densities in solid-state quantum computing architectures. Using detailed atomistic modeling, we investigate CTAP in a more realistic triple donor system in the presence of inevitable fabrication imperfections. In particular, we investigate how an adiabatic pathway for CTAP is ..

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University of Melbourne Researchers

Lloyd Hollenberg Author

Related Projects (1)

Quantum Nanotechnology: Concepts to Devices

Just as the technological advances of the past few decades at the micro level fundamentally changed our lives, so too the emerging era of 'q..

Grants

Awarded by Australian Research Council

Funding Acknowledgements

This work was supported by the Laboratory Directed Research and Development program at Sandia National Laboratories and by the National Security Agency Laboratory for Physical Sciences under Contract No. EAO-09-0000049393. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Co., for the United States Department of Energy under Contract No. DE-AC04-94AL85000. Part of the development of NEMO-3D was initially performed at JPL, Caltech under a contract with NASA. NCN/nanohub.org computational resources were used. This work was supported by the Australian Research Council, NSA, and ARO (Contract No. W911NF-08-1-0527). A.D.G. and L.C.L.H. acknowledge the Australian Research Council for financial support (Projects No. DP0880466 and No. DP0770715, respectively). R. R. also acknowledges discussions with T. Gurrieri and R. Young of SNL.