K2Co(SeO3)2 shows Wannier entropy and continuum spin excitations consistent with a spin supersolid described by a triangular-lattice XXZ model, as supported by neutron scattering and quantum Monte Carlo.
SmoQyDEAC.jl: A differential evolution package for the analytic continuation of imaginary time correlation functions
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abstract
We introduce the SmoQyDEAC.jl package, a Julia implementation of the Differential Evolution Analytic Continuation (DEAC) algorithm [N. S. Nichols et al., Phys. Rev. E 106, 025312 (2022)] for analytically continuing noisy imaginary time correlation functions to the real frequency axis. Our implementation supports fermionic and bosonic correlation functions on either the imaginary time or Matsubara frequency axes, and treatment of the covariance error in the input data. This paper presents an overview of the DEAC algorithm and the features implemented in the SmoQyDEAC.jl. It also provides detailed benchmarks of the package's output against the popular maximum entropy and stochastic analytic continuation methods. The code for this package can be downloaded from our GitHub repository at https://github.com/SmoQySuite/SmoQyDEAC.jl or installed using the Julia package manager. The online documentation, including examples, can be accessed at https://smoqysuite.github.io/SmoQyDEAC.jl/stable/.
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Wannier states and spin supersolid physics in the triangular antiferromagnet K$_2$Co(SeO$_3$)$_2$
K2Co(SeO3)2 shows Wannier entropy and continuum spin excitations consistent with a spin supersolid described by a triangular-lattice XXZ model, as supported by neutron scattering and quantum Monte Carlo.