Engineering the Eigenstates of Coupled Spin- 1/2 Atoms on a Surface

Tutkimustuotos: Lehtiartikkelivertaisarvioitu


  • Kai Yang
  • Yujeong Bae
  • William Paul
  • Fabian D. Natterer
  • Philip Willke
  • Jose Lado

  • Alejandro Ferrón
  • Taeyoung Choi
  • Joaquín Fernández-Rossier
  • Andreas J. Heinrich
  • Christopher P. Lutz


  • IBM
  • Institute for Basic Science
  • Ewha Womans University
  • EPFL Valais Wallis
  • QuantaLab
  • International Iberian Nanotechnology Laboratory
  • Universidad Nacional del Nordeste
  • University of Alicante


Quantum spin networks having engineered geometries and interactions are eagerly pursued for quantum simulation and access to emergent quantum phenomena such as spin liquids. Spin-1/2 centers are particularly desirable, because they readily manifest coherent quantum fluctuations. Here we introduce a controllable spin-1/2 architecture consisting of titanium atoms on a magnesium oxide surface. We tailor the spin interactions by atomic-precision positioning using a scanning tunneling microscope (STM) and subsequently perform electron spin resonance on individual atoms to drive transitions into and out of quantum eigenstates of the coupled-spin system. Interactions between the atoms are mapped over a range of distances extending from highly anisotropic dipole coupling to strong exchange coupling. The local magnetic field of the magnetic STM tip serves to precisely tune the superposition states of a pair of spins. The precise control of the spin-spin interactions and ability to probe the states of the coupled-spin network by addressing individual spins will enable the exploration of quantum many-body systems based on networks of spin-1/2 atoms on surfaces.


JulkaisuPhysical Review Letters
TilaJulkaistu - 29 marraskuuta 2017
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 36718764