Faculty

Travis Lee NICHOLSON

PhD, University of Colorado, USA (2015)

Assistant Professor
Office : S14-03-08  |  Tel : (65) 6601 6192
Email : phyntl@nus.edu.sg

Current Research

Ultracold strontium trapped in optical lattice potentials is the basis for the world's best atomic clocks. Meanwhile ultracold atoms in Rydberg states have realized high-fidelity quantum gates. We aim to combine these two approaches to realize quantum logic with the precision of an atomic clock. With single-site spatial resolution, mHz-level spectroscopy, and tunable long-range interactions (achieved with Rydberg dressing), we can use degenerate strontium in optical lattices for quantum logic with minimal error. We are also interested in using Rydberg dressing to generate squeezed states that can beat the standard quantum limit to measurement precision.

Selected Publications

  1. "Symmetry-protected collisions between strongly interacting photons", J.D. Thompson, T.L. Nicholson, Q.-Y. Liang, S.H. Cantu, A.V. Venkatramani, S. Choi, I.A. Fedorov, D. Viscor, T. Pohl, M.D. Lukin, and V. Vuletic, Nature 542, 206 (2017).

  2. "Systematic evaluation of an atomic clock at 2e-18 total uncertainty", T.L. Nicholson, S.L. Campbell, R.B. Hutson, G.E. Marti, B.J. Bloom, R.L. McNally, W. Zhang, M.D. Barrett, M.S. Safronova, G.F. Strouse, W.L. Tew, and J. Ye, Nature Communications 6, 6896 (2015).

  3. "An optical lattice clock with accuracy and stability at the 10^-18 level", B.J. Bloom, T.L. Nicholson, J. R. Williams, S.L. Campbell, M. Bishof, X. Zhang, W. Zhang, S.L. Bromley, and J. Ye, Nature 506, 71 (2014).

  4. "Comparison of two independent Sr optical clocks with 1e-17 stability at 10^3s", T.L. Nicholson, M.J. Martin, J.R. Williams, B.J. Bloom, M. Bishof, M.D. Swallows, S.L. Campbell, and J. Ye, Physical Review Letters 109, 230801 (2012).

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