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cond-mat.str-el2026
Local wave-packet spectroscopy of the Drude weight in Tomonaga-Luttinger liquids
Takayuki Yokoyama, Yasuhiro Tada
We investigate wave packets generated by a local pulse electric field in a Tomonaga-Luttinger liquid (TLL) with a U(1) charge . Bosonization shows that a local pulse field creat…
cond-mat.quant-gas2026
Artificial-gauge-field-driven reentrant charge-density-wave phase in a three-leg Bose-Hubbard ladder
Takayuki Yokoyama, Yasuhiro Tada
We investigate hard-core bosons at half filling on a three-leg ladder under the uniform artificial gauge field. By analyzing current patterns and correlation functions, we uncover…
cond-mat.str-el2026★ 1 cited
Diagnosing energy gap in quantum spin liquids via polarization amplitude
Takayuki Yokoyama, Yasuhiro Tada
Identifying whether a many-body ground state is gapped or gapless is a fundamental yet challenging problem, especially in quantum spin liquids. In this work, we develop a gap-diagn…