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Relaxation dynamics in a strongly coupled Fermi superfluid
High Energy Physics - Theory · Submitted 6 Jun 2014
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Using a specific example of that kind, we identify the mechanism by which a strongly coupled Fermi superfluid relaxes to equilibrium; it involves a wave of excitation in the momentum space, propagating from the Fermi surface towards the ultraviolet.
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The key feature of time-dependent dynamics in a paired Fermi superfluid is the presence of a large number of independent degrees of freedom---the pairing amplitudes of fermions with different momenta. We argue that useful prototypes of this dynamics come from D-brane constructions of string theory. Using a specific example of that kind, we identify the mechanism by which a strongly coupled Fermi superfluid relaxes to equilibrium; it involves a wave of excitation in the momentum space, propagating from the Fermi surface towards the ultraviolet. For a sudden quench induced by a change in the fermion coupling, we find that the relaxation occurs rapidly, over only a few oscillations of the quasiparticle gap.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The key feature of time-dependent dynamics in a paired Fermi superfluid is the presence of a large number of independent degrees of freedom---the pairing amplitudes of fermions with different momenta. | background 1.00 | 0.14 | 0.07 | asserted 1.00 |
| s1 | We argue that useful prototypes of this dynamics come from D-brane constructions of string theory. | method 0.78 | 0.28 | 0.04 | hedged possibility 0.43 |
| s2 | Using a specific example of that kind, we identify the mechanism by which a strongly coupled Fermi superfluid relaxes to equilibrium; it involves a wave of excitation in the momentum space, propagating from the Fermi surface towards the ultraviolet. | result 0.78 | 0.91 | 0.75 | asserted 1.00 |
| s3 | For a sudden quench induced by a change in the fermion coupling, we find that the relaxation occurs rapidly, over only a few oscillations of the quasiparticle gap. | result 1.00 | 0.95 | 0.28 | asserted 1.00 |
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Original abstract
The key feature of time-dependent dynamics in a paired Fermi superfluid is the presence of a large number of independent degrees of freedom---the pairing amplitudes of fermions with different momenta. We argue that useful prototypes of this dynamics come from D-brane constructions of string theory. Using a specific example of that kind, we identify the mechanism by which a strongly coupled Fermi superfluid relaxes to equilibrium; it involves a wave of excitation in the momentum space, propagating from the Fermi surface towards the ultraviolet. For a sudden quench induced by a change in the fermion coupling, we find that the relaxation occurs rapidly, over only a few oscillations of the quasiparticle gap.
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Accordingly, unlike other constructions of Fermi surfaces from strings (see, e.g., [ref] ), we do not supply the black brane with any charges besides the D-brane charge.
Fermi surfaces in maximal gauged supergravity · Introduction · 0.97
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