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8 papers
Quantum Walks with Indefinite Causal Order
Yuanbo Chen, Yoshihiko Hasegawa
In all existing quantum walk models, the assumption about a pre-existing fixed background causal structure is always made and has been taken for granted. Nevertheless, in this work…
Experimental realization of strong effective magnetic fields in optical superlattice potentials
Monika Aidelsburger, Marcos Atala, Sylvain Nascimbène +3
We present the experimental generation of large effective magnetic fields for ultracold atoms using photon-assisted tunneling in an optical superlattice. The underlying method does…
Experimental realization of plaquette resonating valence bond states with ultracold atoms in optical superlattices
Sylvain Nascimbène, Yu-Ao Chen, Macros Atala +4
The concept of valence bond resonance plays a fundamental role in the theory of the chemical bond and is believed to lie at the heart of many-body quantum physical phenomena. Here…
Experimental realization of strong effective magnetic fields in an optical lattice
Monika Aidelsburger, Marcos Atala, Sylvain Nascimbène +3
We use Raman-assisted tunneling in an optical superlattice to generate large tunable effective magnetic fields for ultracold atoms. When hopping in the lattice, the accumulated pha…
Controlling Correlated Tunneling and Superexchange Interactions with AC-Driven Optical Lattices
Yu-Ao Chen, Sylvain Nascimbène, Monika Aidelsburger +3
The dynamical control of tunneling processes of single particles plays a major role in science ranging from Shapiro steps in Josephson junctions to the control of chemical reaction…
Probing the relaxation towards equilibrium in an isolated strongly correlated 1D Bose gas
Stefan Trotzky, Yu-Ao Chen, Andreas Flesch +4
The problem of how complex quantum systems eventually come to rest lies at the heart of statistical mechanics. The maximum entropy principle put forward in 1957 by E. T. Jaynes sug…
Controlling and Detecting Spin Correlations of Ultracold Atoms in Optical lattices
Stefan Trotzky, Yu-Ao Chen, Ute Schnorrberger +2
We report on the controlled creation of a valence bond state of delocalized effective-spin singlet and triplet dimers by means of a bichromatic optical superlattice. We demonstrate…
Many-body Landau-Zener dynamics in coupled 1D Bose liquids
Yu-Ao Chen, Sebastian D. Huber, Stefan Trotzky +2
The Landau-Zener model of a quantum mechanical two-level system driven with a linearly time dependent detuning has served over decades as a textbook paradigm of quantum dynamics. I…