Quantum dissipation in a scalar field theory with gapped momentum states

Abstract

Understanding quantum dissipation is important from both theoretical perspective and applications. Here, we show how to describe dissipation in a scalar field theory. We treat dissipation non-perturbatively, represent it by a bilinear term in the Lagrangian and quantize the theory. We find that dissipation promotes a gap in momentum space and reduces the particle energy. As a result, particle mass becomes dressed by dissipation due to self-interaction. The underlying mechanism is similar to that governing the propagation of transverse collective modes in liquids. We discuss the interplay between the dissipative and mass terms, the associated different regimes of field dynamics and the emergence of ultraviolet and infrared cutoffs due to dissipation.

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Cited by in corpus (6)

• Gapped momentum states
• Linear response theory of relativistic hydrodynamics with spin
• Field Theory of Dissipative Systems with Gapped Momentum States
• Transverse Collective Modes in Interacting Holographic Plasmas
• Strain-Induced Violation of Temperature Uniformity in Mesoscale Liquids
• Identification of Mechano-stimuli (Linear to Harmonic) Thermal Response in Mesoscopic Liquids