Adiabatic theorem in the thermodynamic limit: Systems with a gap in the bulk

• URL: http://arxiv.org/abs/2012.15239v3
• Date: Wed, 20 Dec 2023 09:36:45 GMT
• Title: Adiabatic theorem in the thermodynamic limit: Systems with a gap in the bulk
• Authors: Joscha Henheik and Stefan Teufel
• Abstract summary: We prove a generalised super-adiabatic theorem for extended fermionic systems. We show that a similar adiabatic theorem also holds in the bulk of finite systems up to errors that vanish faster than any inverse power of the system size.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We prove a generalised super-adiabatic theorem for extended fermionic systems assuming a spectral gap only in the bulk. More precisely, we assume that the infinite system has a unique ground state and that the corresponding GNS-Hamiltonian has a spectral gap above its eigenvalue zero. Moreover, we show that a similar adiabatic theorem also holds in the bulk of finite systems up to errors that vanish faster than any inverse power of the system size, although the corresponding finite volume Hamiltonians need not have a spectral gap.

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