  We present the TRIQS/Nevanlinna analytic continuation package, an efficient
implementation of the methods proposed by J. Fei et al in [Phys. Rev. Lett.
126, 056402 (2021)] and [Phys. Rev. B 104, 165111 (2021)]. TRIQS/Nevanlinna
strives to provide a high quality open source (distributed under the GNU
General Public License version 3) alternative to the more widely adopted
Maximum Entropy based analytic continuation programs. With the additional Hardy
functions optimization procedure, it allows for an accurate resolution of wide
band and sharp features in the spectral function. Those problems can be
formulated in terms of imaginary time or Matsubara frequency response
functions. The application is based on the TRIQS C++/Python framework, which
allows for easy interoperability with other TRIQS-based applications,
electronic band structure codes and visualization tools. Similar to other TRIQS
packages, it comes with a convenient Python interface.
