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School of Physics Hard Condensed Matter & AMO Seminar Series: Presenting Christopher D. Hamley
Current study in quantum dynamical evolution of complex systems investigates quantum systems characterized by fluctuations and quantum correlations. Spin-1 condensates are predicted to generate non-classical states with quantum correlations, specifically squeezed states in the early low depletion limit and highly non-Gaussian distributions in the long term beyond the low depletion limit. These states are created due to the quantum fluctuations about an unstable equilibrium in the spin-nematic subspaces to which the system is initialized. In this talk I will discuss the underlying theory along with our measurements of spin-nematic squeezing , the later non-Gaussian distributions , and our efforts to stabilize the initial unstable equilibrium by periodically perturbing the dynamics.
1. C.D. Hamley, C.S. Gerving, T.M. Hoang, E.M. Bookjans, and M.S. Chapman, “Spin-Nematic Squeezed Vacuum in a Quantum Gas,” Nature Physics 8, 305-308 (2012).
2. C.S. Gerving, T.M. Hoang, B.J. Land, M. Anquez, C.D. Hamley, and M.S. Chapman, “Non-equilibrium dynamics of an unstable quantum pendulum explored in a spin-1 Bose–Einstein condensate,” Nature Communications 3, 1169 (2012)