query: What is exactly a phonon?
positive_passages.docid: 157620
positive_passages.text: What is a phonon?
negative_passages.docid: 1613
negative_passages.text: Is temperature in vacuum zero?
negative_passages.docid: 7032
negative_passages.text: Explain reflection laws at the atomic level
negative_passages.docid: 141760
negative_passages.text: What's an atomic superstate/superposition, and how is it possible?
negative_passages.docid: 155218
negative_passages.text: A physical explanation for negative kelvin temperatures
negative_passages.docid: 67983
negative_passages.text: Intuitive reasons for superconductivity
negative_passages.docid: 88679
negative_passages.text: How does a phonon cause two electrons to attract each other and form a cooper pair?
negative_passages.docid: 84892
negative_passages.text: What truly is mass, and is there a direct way to measure it?
negative_passages.docid: 52418
negative_passages.text: What exactly is a quantum of light?
negative_passages.docid: 24439
negative_passages.text: What is the essential difference between a resonance and a particle?
negative_passages.docid: 118710
negative_passages.text: What really is reflection?
negative_passages.docid: 136849
negative_passages.text: Mathematical rigorous introduction to solid state physics
negative_passages.docid: 146666
negative_passages.text: Intuitive reason for the $T^4$ term in Stefan Boltzmann law
negative_passages.docid: 115428
negative_passages.text: Measures: Atom Definitions
negative_passages.docid: 90250
negative_passages.text: Two explanations of non-zero atomic radius
negative_passages.docid: 130760
negative_passages.text: What are matter waves made of and what is their speed?
negative_passages.docid: 148864
negative_passages.text: The concept of Fermi level