Coherent-state propagation enables quasi-polynomial classical simulation of bosonic circuits with logarithmically many Kerr gates at exponentially small trace-distance error, with polynomial runtime in the weak-nonlinearity regime.
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A first-moment operator diagnostic reveals exponentially many inequivalent initialization distributions avoid barren plateaus in variational quantum algorithms, with numerics indicating distinct attained minima.
A new open-source C++ package computes nested commutators [H,[H,...A]] exactly and symbolically in the thermodynamic limit for spin-1/2 hypercubic lattices.
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Coherent-State Propagation: A Computational Framework for Simulating Bosonic Quantum Systems
Coherent-state propagation enables quasi-polynomial classical simulation of bosonic circuits with logarithmically many Kerr gates at exponentially small trace-distance error, with polynomial runtime in the weak-nonlinearity regime.
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Exponentially many initializations to avoid barren plateaus
A first-moment operator diagnostic reveals exponentially many inequivalent initialization distributions avoid barren plateaus in variational quantum algorithms, with numerics indicating distinct attained minima.
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QCommute: a tool for symbolic computation of nested commutators in quantum many-body spin-1/2 systems
A new open-source C++ package computes nested commutators [H,[H,...A]] exactly and symbolically in the thermodynamic limit for spin-1/2 hypercubic lattices.