Gapped Hamiltonian
In many-body physics, most commonly within condensed-matter physics, a gapped Hamiltonian is a Hamiltonian for an infinitely large many-body system where there is a finite energy gap separating the (possibly degenerate) ground space from the first excited states. A Hamiltonian that is not gapped is called gapless. The property of being gapped or gapless is formally defined through a sequence of Hamiltonians on finite lattices in the thermodynamic limit. An example is the BCS Hamiltonian in the theory of superconductivity.
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Gapped Hamiltonian
In many-body physics, most commonly within condensed-matter physics, a gapped Hamiltonian is a Hamiltonian for an infinitely large many-body system where there is a finite energy gap separating the (possibly degenerate) ground space from the first excited states. A Hamiltonian that is not gapped is called gapless. The property of being gapped or gapless is formally defined through a sequence of Hamiltonians on finite lattices in the thermodynamic limit. An example is the BCS Hamiltonian in the theory of superconductivity.
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In many-body physics, most com ...... amiltonian induces a mass gap.
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In many-body physics, most com ...... e theory of superconductivity.
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Gapped Hamiltonian
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