Topological Charge-2ne Superconductors
read the original abstract
Charge-$4e$ superconductors are phases where quartets of electrons condense in the absence of Cooper pairing condensation. They exhibit distinctive signatures including fractional flux quantization and anomalous Josephson effects, and are actively being explored in strongly correlated systems, such as moir\'e materials. In this work we develop a general framework for topological charge-$2ne$ superconductors based on both wavefunction and field theory approaches. In particular, we generate topological charge-$2ne$ superconductors from charge-$2e$ ingredients, and by breaking the charge $U(1)$ symmetry in certain classes of quantum Hall states, in both spinless and spinful systems. Via bulk-edge correspondence, we further construct the corresponding edge conformal field theory and bulk topological quantum field theory for topological charge-$2ne$ superconductors that suggests fermionic nonabelian topological orders. Our results provide a unified low-energy description of the topological charge-$2ne$ superconductivity, offer a concrete platform for studying symmetry breaking and enrichment in interacting topological phases of matter, and have direct implications for experimental probes such as quasiparticle interferometry.
This paper has not been read by Pith yet.
Forward citations
Cited by 5 Pith papers
-
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 sti...
-
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) gaug...
-
Topological superconductivity from Abelian fractional Chern insulators
U(3) infrared parton theory unifies a ν=1/3 FCI with topological superconductors (SC* preserving U(1)_3, chiral TSC with c_-=3/2, strong-pairing with c_-=3) and a σ_xy=0 CDW.
-
Quantum fluctuations in quartet superfluid of two-dimensional Fermi mixture
Extends Gaussian fluctuation theory from pairing to quartet superfluids in 2D Fermi mixtures, reproducing logarithmic EOS for composite bosons.
-
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.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.