Quantum dynamics of a mobile spin impurity

Fukuhara, TakeshiMax-Planck-Institut für Quantenoptik, 85748 Garching, Germany (författare)

One of the elementary processes in quantum magnetism is the propagation of spin excitations. Here we study the quantum dynamics of a deterministically created spin-impurity atom, as it propagates in a one-dimensional lattice system. We probe the spatial probability distribution of the impurity at different times using single-site-resolved imaging of bosonic atoms in an optical lattice. In the Mott-insulating regime, the quantum-coherent propagation of a magnetic excitation in the Heisenberg model can be observed using a post-selection technique. Extending the study to the superfluid regime of the bath, we quantitatively determine how the bath affects the motion of the impurity, showing evidence of polaronic behaviour. The experimental data agree with theoretical predictions, allowing us to determine the effect of temperature on the impurity motion. Our results provide a new approach to studying quantum magnetism, mobile impurities in quantum fluids and polarons in lattice systems.

Kantian, AdrianDPMC-MaNEP, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva(Swepub:uu)adrka175 (författare)
Endres, ManuelMax-Planck-Institut für Quantenoptik, 85748 Garching, Germany (författare)
Cheneau, MarcMax-Planck-Institut für Quantenoptik, 85748 Garching, Germany (författare)
Schauß, PeterMax-Planck-Institut für Quantenoptik, 85748 Garching, Germany (författare)
Hild, SebastianMax-Planck-Institut für Quantenoptik, 85748 Garching, Germany (författare)
Bellem, DavidMax-Planck-Institut für Quantenoptik, 85748 Garching, Germany (författare)
Schollwöck, UlrichFakultät für Physik, Ludwig-Maximilians-Universität München, 80799 München, Germany (författare)
Giamarchi, ThierryDPMC-MaNEP, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva, Switzerland (författare)
Gross, ChristianMax-Planck-Institut für Quantenoptik, 85748 Garching, Germany (författare)
Bloch, ImmanuelMax-Planck-Institut für Quantenoptik, 85748 Garching, Germany;Fakultät für Physik, Ludwig-Maximilians-Universität München, 80799 München, Germany (författare)
Kuhr, StefanMax-Planck-Institut für Quantenoptik, 85748 Garching, Germany;University of Strathclyde, Department of Physics, SUPA, Glasgow G4 0NG, UK (författare)
Max-Planck-Institut für Quantenoptik, 85748 Garching, GermanyDPMC-MaNEP, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva (creator_code:org_t)

Ingår i:Nature Physics: Nature Publishing Group9:4, s. 235-2411745-24731745-2481

Av författaren/redakt...: Fukuhara, Takesh ...; Kantian, Adrian; Endres, Manuel; Cheneau, Marc; Schauß, Peter; Hild, Sebastian; visa fler...; Bellem, David; Schollwöck, Ulri ...; Giamarchi, Thier ...; Gross, Christian; Bloch, Immanuel; Kuhr, Stefan; visa färre...

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