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15 papers · 2 filters
Steady-state spin synchronization through the collective motion of trapped ions
Athreya Shankar, John Cooper, Justin G. Bohnet +2
Ultranarrow-linewidth atoms coupled to a lossy optical cavity mode synchronize, i.e. develop correlations, and exhibit steady-state superradiance when continuously repumped. This t…
Chained Bell Inequality Experiment with High-Efficiency Measurements
T. R. Tan, Y. Wan, S. Erickson +6
We report correlation measurements on two Be ions that violate a chained Bell inequality obeyed by any local-realistic theory. The correlations can be modeled as derived fr…
Quantum Estimation of Parameters of Classical Spacetimes
T. G. Downes, J. R. van Meter, E. Knill +2
We describe a quantum limit to measurement of classical spacetimes. Specifically, we formulate a quantum Cramer-Rao lower bound for estimating the single parameter in any one-param…
An atom interferometer with a shaken optical lattice
C. A. Weidner, Hoon Yu, Ronnie Kosloff +1
We introduce shaken lattice interferometry with atoms trapped in a one-dimensional optical lattice. By phase modulating (shaking) the lattice, we control the momentum state of the…
Measuring out-of-time-order correlations and multiple quantum spectra in a trapped ion quantum magnet
Martin Gärttner, Justin G. Bohnet, Arghavan Safavi-Naini +3
Controllable arrays of ions and ultra-cold atoms can simulate complex many-body phenomena and may provide insights into unsolved problems in modern science. To this end, experiment…
Spectrum estimation of density operators with alkaline-earth atoms
Michael E. Beverland, Jeongwan Haah, Gorjan Alagic +3
We show that Ramsey spectroscopy of fermionic alkaline-earth atoms in a square-well trap provides an efficient and accurate estimate for the eigenspectrum of a density matrix whose…