Gaplessness is not generic for translation-invariant spin chains

15 Jul 2019 Lemm Marius

The existence of a spectral gap above the ground state has far-reaching consequences for the low-energy physics of a quantum many-body system. A recent work of Movassagh [R. Movassagh, PRL 119 (2017), 220504] shows that a spatially random local quantum Hamiltonian is generically gapless... (read more)

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  • QUANTUM PHYSICS
  • STATISTICAL MECHANICS
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