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Synthesis, spectroscopic and computational studies of photochromic azobenzene derivatives with 2-azabicycloalkane scaffold. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Xiao Y, Borgh MO, Blinova A, Ollikainen T, Ruostekoski J, Hall DS. Topological superfluid defects with discrete point group symmetries. Nat Commun 2022; 13:4635. [PMID: 35941173 PMCID: PMC9360439 DOI: 10.1038/s41467-022-32362-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 07/26/2022] [Indexed: 11/09/2022] Open
Abstract
Discrete symmetries are spatially ubiquitous but are often hidden in internal states of systems where they can have especially profound consequences. In this work we create and verify exotic magnetic phases of atomic spinor Bose-Einstein condensates that, despite their continuous character and intrinsic spatial isotropy, exhibit complex discrete polytope symmetries in their topological defects. Using carefully tailored spinor rotations and microwave transitions, we engineer singular line defects whose quantization conditions, exchange statistics, and dynamics are fundamentally determined by these underlying symmetries. We show how filling the vortex line singularities with atoms in a variety of different phases leads to core structures that possess magnetic interfaces with rich combinations of discrete and continuous symmetries. Such defects, with their non-commutative properties, could provide unconventional realizations of quantum information and interferometry.
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Affiliation(s)
- Y Xiao
- Department of Physics and Astronomy, Amherst College, Amherst, MA, 01002, USA
- Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI, 48109, USA
| | - M O Borgh
- Physics, Faculty of Science, University of East Anglia, Norwich, NR4 7TJ, UK
| | - A Blinova
- Department of Physics and Astronomy, Amherst College, Amherst, MA, 01002, USA
- Department of Physics, University of Massachusetts Amherst, Amherst, MA, 01003, USA
| | - T Ollikainen
- Department of Physics and Astronomy, Amherst College, Amherst, MA, 01002, USA
- QCD Labs, QTF Centre of Excellence, Department of Applied Physics, Aalto University, P.O. Box 13500, FI-00076, Aalto, Finland
- Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, 6020, Innsbruck, Austria
| | - J Ruostekoski
- Department of Physics, Lancaster University, Lancaster, LA1 4YB, UK
| | - D S Hall
- Department of Physics and Astronomy, Amherst College, Amherst, MA, 01002, USA.
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