A permutation-symmetric stochastic unraveling reduces computational cost for N two-level emitters from O(N^5) to O(N) and enables large-N simulations for d-level systems with scaling O(N^{d(d-1)/2}).
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The maximum photon emission rate in atomic ensembles scales universally as atom number times optical depth at fixed density, unifying ordered and disordered systems from independent emission to the Dicke limit.
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Permutation-symmetric quantum trajectories
A permutation-symmetric stochastic unraveling reduces computational cost for N two-level emitters from O(N^5) to O(N) and enables large-N simulations for d-level systems with scaling O(N^{d(d-1)/2}).
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Optical depth dictates universal bounds on many-body decay in atomic ensembles
The maximum photon emission rate in atomic ensembles scales universally as atom number times optical depth at fixed density, unifying ordered and disordered systems from independent emission to the Dicke limit.