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quant-ph2008★ 12 cited
Causal signal transmission by quantum fields. II. Quantum-statistical response of interacting bosons
L. I. Plimak, S. Stenholm
We analyse nonperturbatively signal transmission patterns in Green's functions of interacting quantum fields. Quantum field theory is re-formulated in terms of the nonlinear quantu…
quant-ph2008★ 12 cited
Causal signal transmission by quantum fields. I. Response of the harmonic oscillator
L. I. Plimak, S. Stenholm
It is shown that response properties of a quantum harmonic oscillator are in essence those of a classical oscillator, and that, paradoxical as it may be, these classical properties…