페이지 정보2019.09.16 / 402
1. 연사: 박지우 박사 (Seoul National University)
2. 일시: 2019. 9. 26(목), 오후 3시 30분
3. 장소: 공학3동 302호 (세미나실)
4. 제목: Experiments with strongly interacting Fermi gases of atoms and molecules
Created at nK temperatures, ultracold atomic Fermi gases with strong interactions are model many-body systems that allow quantitative studies of strongly correlated phenomena. However, to perform quantum simulation of more realistic many-body Hamiltonians and to enable quantum information processing, a key challenge is to go beyond the simple short-range contact interaction assumed for neutral atoms. A quantum gas of dipolar molecules hold exceptional promise in this regard, whose long-range and anisotropic dipole-dipole interaction can allow the creation of exotic quantum matter such as topological superfluids and the implementation of two-qubit gate operations necessary for quantum computation.
In my talk, I will present the creation and coherent control of an ultracold gas of chemically stable fermionic 23Na40K molecules with large electric dipole moments . This involves the atom-by-atom assembly of molecules from ultracold gases of sodium and potassium atoms, while maintaining the low entropy of the molecular gas. Using optical and microwave fields, we achieve fully coherent control of their internal states, revealing that the nuclear spin states of these molecules exhibit exceptional coherence times for their use as robust storage qubits . By further reducing the temperature of the molecular gas and combining state-of-the-art optical trapping techniques, this system can realize a highly scalable and programmable platform for quantum simulation and quantum information processing that go beyond the limits of classical technology.
 J. W. Park, S. Will, and M. W. Zwierlein, Phys. Rev. Lett. 114, 205302 (2015)
 J. W. Park, Z. Z. Yan, H. Loh, S. Will, and M. W. Zwierlein, Science 357, 372 (2017)
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