Abstract
In this chapter we discuss the Goldstone mode in a fermionic superfluid. So far, we have discussed the Goldstone mode in a bosonic superfluid, Chap. 3, and the absence of a Goldstone mode in a fermionic superconductor, Chap. 6 In our field-theoretical discussion of a fermionic superfluid in Chap. 5 we have discussed fermionic excitations, in particular their energy gap.
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Notes
- 1.
Note that \(\psi = e^{-i\mathbf{q}\cdot \mathbf{x}}\psi ^{{\prime}}\), but \(\psi _{C} = e^{+i\mathbf{q}\cdot \mathbf{x}}\psi _{C}^{{\prime}}\) because \(\psi _{C} = C\bar{\psi }^{T}\).
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Schmitt, A. (2015). Low-Energy Excitations in a Fermionic Superfluid. In: Introduction to Superfluidity. Lecture Notes in Physics, vol 888. Springer, Cham. https://doi.org/10.1007/978-3-319-07947-9_8
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DOI: https://doi.org/10.1007/978-3-319-07947-9_8
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