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Ryu, C. ., Andersen, M. F., Clade, P. ., Natarajan, V. ., Helmerson, K. ., & Phillips, W. D. (2007). Observation of persistent flow of a Bose-Einstein condensate in a toroidal trap. Physical Review Letters, 99. http://doi.org/10.1103/PhysRevLett.99.260401

Ramanathan, A. ., Wright, K. C., Muniz, S. R., Zelan, M. ., Hill, W. T., Lobb, C. J., … Campbell, G. K. (2011). Superflow in a Toroidal Bose-Einstein Condensate: An Atom Circuit with a Tunable Weak Link. Physical Review Letters, 106. http://doi.org/10.1103/PhysRevLett.106.130401

Ramos, E. R. F., Henn, E. A. L., Seman, J. A., Caracanhas, M. A., Magalhaes, K. M. F., Helmerson, K. ., … Bagnato, V. S. (2008). Generation of nonground-state Bose-Einstein condensates by modulating atomic interactions. Physical Review A, 78. http://doi.org/10.1103/PhysRevA.78.063412

Ramanathan, A. ., Muniz, S. R., Wright, K. C., Anderson, R. P., Phillips, W. D., Helmerson, K. ., & Campbell, G. K. (2012). Partial-transfer absorption imaging: A versatile technique for optimal imaging of ultracold gases. Review of Scientific Instruments, 83. http://doi.org/10.1063/1.4747163

Johnstone, S. P., Groszek, A. J., Starkey, P. T., Billington, C. J., Simula, T. P., & Helmerson, K. . (2019). Evolution of large-scale flow from turbulence in a two-dimensional superfluid. Science, 364, 1267-+. http://doi.org/10.1126/science.aat5793

Clade, P. ., Ryu, C. ., Ramanathan, A. ., Helmerson, K. ., & Phillips, W. D. (2009). Observation of a 2D Bose Gas: From Thermal to Quasicondensate to Superfluid. Physical Review Letters, 102. http://doi.org/10.1103/PhysRevLett.102.170401