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quant-ph2025
Efficient tensor-network simulations of weakly-measured quantum circuits
Darren Pereira, Leonardo Banchi
We present a tensor-network-based method for simulating a weakly-measured quantum circuit. In particular, we use a Markov chain to efficiently sample measurements and contract the…
cond-mat.str-el2025
Spin-spiral instability of the Nagaoka ferromagnet in the crossover between square and triangular lattices
Darren Pereira, Erich J. Mueller
We study the hard-core Fermi-Hubbard model in the crossover between square and triangular lattices near half-filling. As was recognized by Nagaoka in the 1960s, on the square latti…
cond-mat.str-el2025★ 5 cited
Kinetic magnetism in the crossover between the square and triangular lattice Fermi-Hubbard models
Darren Pereira, Erich J. Mueller
We calculate the spin correlations that result from the motion of a single dopant in the hard-core Fermi-Hubbard model, as the geometry evolves from a square to a triangular lattic…