Quantum Noise of Electron–Phonon Heat Current

Jukka P. Pekola, Bayan Karimi*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)


We analyze heat current fluctuations between electrons and phonons in a metal. In equilibrium we recover the standard result consistent with the fluctuation–dissipation theorem. Here we show that heat current noise at finite frequencies remains non-vanishing down to zero temperature. From the experimental point of view, it is a small effect and up to now elusive. We briefly discuss the impact of electron–phonon heat current fluctuations on calorimetry, particularly in the regime of single microwave-photon detection.

Original languageEnglish
Pages (from-to)373–379
Number of pages7
JournalJournal of Low Temperature Physics
Issue number5-6
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed


  • Electron–phonon coupling
  • Heat current
  • Quantum fluctuations


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