A new non-engineered SU(4) fermion model exhibits high-temperature charge-4e superconductivity via unbiased quantum Monte Carlo, with Tc increasing linearly with coupling and a BKT transition marked by a charge-4e stiffness jump.
Primary charge-4e superconduc- tivity from doping a featureless Mott insulator
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QMC simulations establish a zero-temperature charge-4e superconducting phase in the attractive SU(4) Hubbard model, with the charge-2e to charge-4e transition described by deconfined pseudocriticality in an Sp(4) gauge-Higgs theory whose one-loop exponents match the numerics.
Superconductors are bosonic at low energy yet carry a gravito-magnetic anomaly from fermion parity gauging that forbids trivial massive phases in 3D and 4D.
citing papers explorer
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High-temperature charge-4e superconductivity in SU(4) interacting fermions
A new non-engineered SU(4) fermion model exhibits high-temperature charge-4e superconductivity via unbiased quantum Monte Carlo, with Tc increasing linearly with coupling and a BKT transition marked by a charge-4e stiffness jump.
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Quantum Charge-4e Superconductivity and Deconfined Pseudocriticality in the Attractive SU(4) Hubbard Model
QMC simulations establish a zero-temperature charge-4e superconducting phase in the attractive SU(4) Hubbard model, with the charge-2e to charge-4e transition described by deconfined pseudocriticality in an Sp(4) gauge-Higgs theory whose one-loop exponents match the numerics.
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Gauging in superconductors and other electronic systems
Superconductors are bosonic at low energy yet carry a gravito-magnetic anomaly from fermion parity gauging that forbids trivial massive phases in 3D and 4D.
- Topological superconductivity from Abelian fractional Chern insulators