Effect of Bound States on the Excitation Spectrum of a Heisenberg Ferromagnet at Low Temperature
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Physics
Quantum Physics
Quantum Physics
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Silberglitt, Richard
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A compact expression for the energy shift and inverse lifetime (energy width) of spin waves in a Heisenberg ferromagnet at low temperatures is given. The two-particle bound states are observable via the resonance they cause in the self-energy of spin waves.
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1967-07-03
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Physical Review Letters