Hydrodynamic Cooperons in Electron Fluids: Schwinger--Keldysh Derivation and Quantum Corrections to Magnetoresistance
Fuente:
arXiv
Saved in:
| Main Author: | |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866910257215700992 |
|---|---|
| author | Cortijo, Alberto |
| author_facet | Cortijo, Alberto |
| contents | We develop a Schwinger--Keldysh effective theory for quantum-interference corrections in a two-dimensional electron system in the hydrodynamic regime. Starting from the clean hydrodynamic fixed point, we introduce a minimal random-friction disorder model that generates a finite momentum-relaxation time within the self-consistent Born approximation. The disorder-averaged theory then allows us to construct a hydrodynamic Cooperon and to compute the associated self-energy corrections to the collective modes. Conservation laws protect the density and momentum sectors, so that the leading quantum-coherence correction is forced into the spin-two stress sector. The associated stress self-energy renormalizes the shear viscosity and modifies both the Gurzhi response and its low-field magnetohydrodynamic signatures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_26226 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Hydrodynamic Cooperons in Electron Fluids: Schwinger--Keldysh Derivation and Quantum Corrections to Magnetoresistance Cortijo, Alberto Strongly Correlated Electrons We develop a Schwinger--Keldysh effective theory for quantum-interference corrections in a two-dimensional electron system in the hydrodynamic regime. Starting from the clean hydrodynamic fixed point, we introduce a minimal random-friction disorder model that generates a finite momentum-relaxation time within the self-consistent Born approximation. The disorder-averaged theory then allows us to construct a hydrodynamic Cooperon and to compute the associated self-energy corrections to the collective modes. Conservation laws protect the density and momentum sectors, so that the leading quantum-coherence correction is forced into the spin-two stress sector. The associated stress self-energy renormalizes the shear viscosity and modifies both the Gurzhi response and its low-field magnetohydrodynamic signatures. |
| title | Hydrodynamic Cooperons in Electron Fluids: Schwinger--Keldysh Derivation and Quantum Corrections to Magnetoresistance |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2605.26226 |