Single-Atom Gating of Quantum State Superpositions Metadata

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Title

  • Main Title Single-Atom Gating of Quantum State Superpositions

Creator

  • Author: Moon, Christopher
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization

Publisher

  • Name: SLAC National Accelerator Laboratory
    Place of Publication: United States

Date

  • Creation: 2010-04-28

Language

  • English

Description

  • Content Description: The ultimate miniaturization of electronic devices will likely require local and coherent control of single electronic wavefunctions. Wavefunctions exist within both physical real space and an abstract state space with a simple geometric interpretation: this state space - or Hilbert space - is spanned by mutually orthogonal state vectors corresponding to the quantized degrees of freedom of the real-space system. Measurement of superpositions is akin to accessing the direction of a vector in Hilbert space, determining an angle of rotation equivalent to quantum phase. Here we show that an individual atom inside a designed quantum corral1 can control this angle, producing arbitrary coherent superpositions of spatial quantum states. Using scanning tunnelling microscopy and nanostructures assembled atom-by-atom we demonstrate how single spins and quantum mirages can be harnessed to image the superposition of two electronic states. We also present a straightforward method to determine the atom path enacting phase rotations between any desired state vectors. A single atom thus becomes a real-space handle for an abstract Hilbert space, providing a simple technique for coherent quantum state manipulation at the spatial limit of condensed matter.

Subject

  • Keyword: Vectors Matsci
  • Keyword: Nanostructures
  • Keyword: Atoms
  • Keyword: Microscopy
  • Keyword: Miniaturization
  • Keyword: Hilbert Space
  • STI Subject Categories: 71 Classical And Quantum Mechanics, General Physics
  • Keyword: Degrees Of Freedom
  • Keyword: Matsci
  • Keyword: Rotation

Source

  • Journal Name: Submitted to Nature Physics

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Report No.: SLAC-PUB-13993
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 979047
  • Archival Resource Key: ark:/67531/metadc933082

Note

  • Display Note: http://www.slac.stanford.edu/cgi-wrap/pubpage?slac-pub-13993.html