简介: |
Quantum three-body recombination in three-dimensional systems is influenced by a series of weakly bound trimers known as Efimov states, which are induced by short-range interactions and exhibit a discrete scaling symmetry. On the other hand, two-dimensional systems with contact interactions are characterized by continuous scale invariance and support no Efimov physics. This raises questions about the behaviour of three-body recombination in the transition from three to two dimensions. We use ultracold caesium atoms trapped in anisotropic potentials formed by a pair of counter-propagating laser beams to experimentally investigate three-body recombination in quasi-two-dimensional systems with tunable confinement and tunable interactions. In our recent experiments, we observed a smooth transition of the three-body recombination rate coefficient from a three-dimensional to a deeply quasi-two-dimensional system. A comparison between the results obtained near two Feshbach resonances indicates a universal behaviour of three-body recombination in the quasi-two-dimensional regime. I will also talk about our related results on the second Efimov resonance and temperature effects on an Efimov resonance.
个人简介：黄博
Scientific Career
08.2015 – Post-Doc at IQOQI, Innsbruck, Austria.
02.2010 – 07.2015 PhD work at Universität Innsbruck, Austria
11.2008 – 12.2009 Master study at Universität Innsbruck and IQOQI, Innsbruck, Austria.
09.2004 – 07.2008 Studies of physics (Bachelor), School of Physics, Peking University, Beijing, China
Publications
[1] Bose-Einstein Condensation of Strontium, Simon Stellmer, Meng Khoon Tey, Bo Huang, Rudolf Grimm, Florian Schreck, Phys. Rev. Lett. 103, 200401 (2009)
[2] Universality of the three-body parameter for Efimov states in ultracold cesium, M. Berninger, A. Zenesini, B. Huang, W. Harm, H.-C. Nägerl, F. Ferlaino, R. Grimm, P. S. Julienne, J. M. Hutson, Phys. Rev. Lett. 107, 120401 (2011)
[3] Feshbach resonances, weakly bound molecular states, and coupled-channel potentials for cesium at high magnetic fields, M. Berninger, A. Zenesini, B. Huang, W. Harm, H.-C. Nägerl, F. Ferlaino, R. Grimm, P. S. Julienne, J. M. Hutson
Phys. Rev. A 87, 032517 (2013)
[4] Resonant five-body recombination in an ultracold gas, A. Zenesini, B. Huang, M. Berninger, S. Besler, H.-C. Nägerl, F. Ferlaino, R. Grimm, Chris H. Greene, J. von Stecher, New J. Phys. 15, 043040 (2013)
[5] Observation of the second triatomic resonance in Efimov's scenario, B. Huang, L. A. Sidorenkov, R. Grimm, J. M. Hutson, Phys. Rev. Lett. 112, 190401 (2014)
[6] Resonant atom-dimer collisions in cesium: Testing universality at positive scattering lengths, A. Zenesini, B. Huang, M. Berninger, H.-C. Nägerl, F. Ferlaino, R. Grimm, Phys. Rev. A 90, 022704 (2014)
[7] The three-body parameter for Efimov states in lithium-6, B. Huang, K. M. O'Hara, R. Grimm, J. M. Hutson, D. S. Petrov, Phys. Rev. A 90, 043636 (2014)
[8] Finite-temperature effects on a triatomic Efimov resonance in ultracold cesium, B. Huang, L. A. Sidorenkov, R. Grimm, Phys. Rev. A 91, 063622 (2015) |
