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Quantum Gate Sets for Lattice QCD in the strong coupling limit: $N_f=1$

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arxiv 2308.03196 v1 pith:HF65R4UO submitted 2023-08-06 hep-lat quant-ph

classification hep-latquant-ph
keywords quantumbaryonsgatelatticelimittheorydynamicssets
verification ladder T0 review T1 audit T2 compute T3 formal
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We derive the primitive quantum gate sets to simulate lattice quantum chromodynamics (LQCD) in the strong-coupling limit with one flavor of massless staggered quarks. This theory is of interest for studies at non-zero density as the sign problem can be overcome using Monte Carlo methods. In this work, we use it as a testing ground for quantum simulations. The key point is that no truncation of the bosonic Hilbert space is necessary as the theory is formulated in terms of color-singlet degrees of freedom (``baryons'' and ``mesons''). The baryons become static in the limit of continuous time and decouple, whereas the dynamics of the mesonic theory involves two qubits per lattice site. Lending dynamics also to the ``baryons'' simply requires to use the derived gate set in its controlled version.

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  1. The chiral critical point from the strong coupling expansion

    hep-lat 2025-02 conditional novelty 6.0 of 10

    At O(beta^2) in the strong coupling expansion, the chiral tri-critical point of one-flavor staggered QCD shifts very little for beta up to 1.

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