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Symmetry-protected ...
Symmetry-protected Bose-Einstein condensation of interacting hardcore bosons
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- Wilke, Reja H. (author)
- Ludwig Maximilians Univ Munchen, Arnold Sommerfeld Ctr Theoret Phys ASC, Dept Phys, D-80333 Munich, Germany.;Munich Ctr Quantum Sci & Technol MCQST, Schellingstr 4, D-80799 Munich, Germany.
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- Köhler, Thomas (author)
- Uppsala universitet,Materialteori
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- Palm, Felix A. (author)
- Ludwig Maximilians Univ Munchen, Arnold Sommerfeld Ctr Theoret Phys ASC, Dept Phys, D-80333 Munich, Germany.;Munich Ctr Quantum Sci & Technol MCQST, Schellingstr 4, D-80799 Munich, Germany.
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- Paeckel, Sebastian (author)
- Ludwig Maximilians Univ Munchen, Arnold Sommerfeld Ctr Theoret Phys ASC, Dept Phys, D-80333 Munich, Germany.;Munich Ctr Quantum Sci & Technol MCQST, Schellingstr 4, D-80799 Munich, Germany.
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Ludwig Maximilians Univ Munchen, Arnold Sommerfeld Ctr Theoret Phys ASC, Dept Phys, D-80333 Munich, Germany;Munich Ctr Quantum Sci & Technol MCQST, Schellingstr 4, D-80799 Munich, Germany. Materialteori (creator_code:org_t)
- Springer Nature, 2023
- 2023
- English.
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In: Communications Physics. - : Springer Nature. - 2399-3650. ; 6:1
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Abstract
Subject headings
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- The large practical potential of exotic quantum states is often precluded by their notorious fragility against external perturbations or temperature. Here, we introduce a mechanism stabilizing a one-dimensional quantum many-body phase exploiting an emergent Z(2) -symmetry based on a simple geometrical modification, i.e. a site that couples to all lattice sites. We illustrate this mechanism by constructing the solution of the full quantum many-body problem of hardcore bosons on a wheel geometry, which are known to form Bose-Einstein condensates. The robustness of the condensate against interactions is shown numerically by adding nearest-neighbor interactions, which typically destroy Bose-Einstein condensates. We discuss further applications such as geometrically inducing finite-momentum condensates. Since our solution strategy is based on a generic mapping, our findings are applicable in a broader context, in which a particular state should be protected, by introducing an additional center site.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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