% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Xu:1048450,
      author       = {Xu, Xuexin and Wang, Siyu and Joshi, Radhika and Hai, Rihan
                      and Ansari, Mohammad H.},
      title        = {{P}arity {C}ross-{R}esonance: {A} {M}ultiqubit {G}ate},
      reportid     = {FZJ-2025-04656, arXiv:2508.10807},
      year         = {2025},
      note         = {19 pages, 10 figures},
      abstract     = {We present a native three-qubit entangling gate that
                      exploits engineered interactions to realize
                      control-control-target and control-target-target operations
                      in a single coherent step. Unlike conventional
                      decompositions into multiple two-qubit gates, our hybrid
                      optimization approach selectively amplifies desired
                      interactions while suppressing unwanted couplings, yielding
                      robust performance across the computational subspace and
                      beyond. The new gate can be classified as a cross-resonance
                      gate. We show it can be utilized in several ways, for
                      example, in GHZ triplet state preparation, Toffoli-class
                      logic demonstrations with many-body interactions, and in
                      implementing a controlled-ZZ gate. The latter maps the
                      parity of two data qubits directly onto a measurement qubit,
                      enabling faster and higher-fidelity stabilizer measurements
                      in surface-code quantum error correction. In all these
                      examples, we show that the three-qubit gate performance
                      remains robust across Hilbert space sizes, as confirmed by
                      testing under increasing total excitation numbers. This work
                      lays the foundation for co-designing circuit architectures
                      and control protocols that leverage native multiqubit
                      interactions as core elements of next-generation
                      superconducting quantum processors.},
      cin          = {PGI-2},
      cid          = {I:(DE-Juel1)PGI-2-20110106},
      pnm          = {5221 - Advanced Solid-State Qubits and Qubit Systems
                      (POF4-522)},
      pid          = {G:(DE-HGF)POF4-5221},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2508.10807},
      howpublished = {arXiv:2508.10807},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2508.10807;\%\%$},
      url          = {https://juser.fz-juelich.de/record/1048450},
}