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- Stefan Trotzky, Patrick Cheinet, +7 authors Immanuel Bloch
- Science
- 2008

Quantum mechanical superexchange interactions form the basis of quantum magnetism in strongly correlated electronic media. We report on the direct measurement of superexchange interactions with… (More)

- Michael. J. Martin, M. Bishof, +6 authors Jun Ye
- Science
- 2013

Strongly interacting quantum many-body systems arise in many areas of physics, but their complexity generally precludes exact solutions to their dynamics. We explored a strongly interacting two-level… (More)

- Adam M. Kaufman, Brian J. Lester, +5 authors Cindy A. Regal
- Science
- 2014

The quantum statistics of atoms is typically observed in the behavior of an ensemble via macroscopic observables. However, quantum statistics modifies the behavior of even two particles. Here, we… (More)

- Alexey V. Gorshkov, Michael A. Hermele, +7 authors Ana María Monterde Rey
- 2010

Fermionic alkaline-earth atoms have unique properties that make them attractive candidates for the realization of atomic clocks and degenerate quantum gases. At the same time, they are attracting… (More)

- Matthew D. Swallows, Michael Bishof, +4 authors Jun Ye
- Science
- 2011

Optical lattice clocks with extremely stable frequency are possible when many atoms are interrogated simultaneously, but this precision may come at the cost of systematic inaccuracy resulting from… (More)

- Xiaopu Zhang, M. Bishof, +5 authors Juntao Ye
- Science
- 2014

SU(N) symmetry can emerge in a quantum system with N single-particle spin states when spin is decoupled from interparticle interactions. Taking advantage of the high measurement precision offered by… (More)

- Alexey V. Gorshkov, S. Manmana, +4 authors Ana María Monterde Rey
- Physical review letters
- 2011

By selecting two dressed rotational states of ultracold polar molecules in an optical lattice, we obtain a highly tunable generalization of the t-J model, which we refer to as the t-J-V-W model. In… (More)

- Michael A. Hermele, Victor Gurarie, Ana María Monterde Rey
- Physical review letters
- 2009

We study Mott insulators of fermionic alkaline earth atoms, described by Heisenberg spin models with enhanced SU(N) symmetry. In dramatic contrast to SU(2) magnetism, more than two spins are required… (More)

To advance quantum information science, physical systems are sought that meet the stringent requirements for creating and preserving quantum entanglement. In atomic physics, robust two-qubit… (More)

- M. D. Swallows, M. José Rivero Martín, +5 authors Jun Ye
- IEEE Transactions on Ultrasonics, Ferroelectrics…
- 2012

We describe recent experimental progress with the JILA Sr optical frequency standard, which has a systematic uncertainty at the 10-16 fractional frequency level. An upgraded laser system has recently… (More)