Dissipative Spectroscopy

• URL: http://arxiv.org/abs/2602.14557v1
• Date: Mon, 16 Feb 2026 08:35:11 GMT
• Title: Dissipative Spectroscopy
• Authors: Xudong He, Yu Chen,
• Abstract summary: We introduce dissipative spectroscopy as a framework for extracting spectral information from quantum systems via controlled dissipation.<n>We show that the DS can identify two-particle soft modes near quantum critical points and, on the normal-phase side, predict the emergence of macroscopic order exhibiting power-law growth following a dissipation quench.
• Score: 4.527618005279638
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We introduce dissipative spectroscopy as a framework for extracting spectral information from quantum systems via controlled dissipation. By establishing a general dissipative response theory applicable to both Markovian and non-Markovian environments, we develop a protocol to access the dissipative spectrum (DS) through driven oscillation-dissipation resonance. We show that the DS can identify two-particle soft modes near quantum critical points and, on the normal-phase side, predict the emergence of macroscopic order exhibiting power-law growth following a dissipation quench. These distinctive signatures appear in quasiparticle-dominant regimes, previously considered trivial. Furthermore, we introduce extended dissipative susceptibilities that capture leading memory effects and demonstrate their utility in a dissipative fermionic model. Our results indicate that the DS is readily accessible and offers a versatile tool for probing equilibrium properties as well as predicting nonequilibrium dissipative dynamics.

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