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

Kai Yang, Yujeong Bae, William Paul, Fabian D. Natterer, Philip Willke, Jose L. Lado, Alejandro Ferrón, Taeyoung Choi, Joaquín Fernández-Rossier, Andreas J. Heinrich*, Christopher P. Lutz

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

26 Sitaatiot (Scopus)

Abstrakti

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.

AlkuperäiskieliEnglanti
Artikkeli227206
JulkaisuPhysical Review Letters
Vuosikerta119
Numero22
DOI - pysyväislinkit
TilaJulkaistu - 29 marraskuuta 2017
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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  • Siteeraa tätä

    Yang, K., Bae, Y., Paul, W., Natterer, F. D., Willke, P., Lado, J. L., ... Lutz, C. P. (2017). Engineering the Eigenstates of Coupled Spin- 1/2 Atoms on a Surface. Physical Review Letters, 119(22), [227206]. https://doi.org/10.1103/PhysRevLett.119.227206