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- W4385303288 abstract "Bose gas on a two-leg ladder exhibits an interesting topological phase. We show the presence of a bosonic symmetry-protected-topological (SPT) phase protected by $Z_2times Z_2$ symmetry. This symmetry leads to $Z_4$ fractional quantization of $Z_4$ Berry phase, that is a topological order parameter to identify the bulk. Using the $Z_4$ Berry phase, we have shown that the interacting bosonic system possesses rich topological phases depending on particle density and strength of interaction. Based on the bulk-edge correspondence, each edge state of the SPT phases is discussed in relation to the $Z_4$ Berry phases. Especially we have found an intermediate phase that is not adiabatically connected to a simple adiabatic limit, that possesses unconventional edge states, which we have numerically demonstrate by employing the density-matrix-renormalization group algorithm." @default.
- W4385303288 created "2023-07-28" @default.
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- W4385303288 date "2023-07-27" @default.
- W4385303288 modified "2023-10-17" @default.
- W4385303288 title "<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>Z</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mo>×</mml:mo><mml:msub><mml:mi>Z</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> symmetry and <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi>Z</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math> Berry phase of bosonic ladders" @default.
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- W4385303288 doi "https://doi.org/10.1103/physreva.108.013319" @default.
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