A derivation connecting collision models to chain mapping claims to make collision models numerically exact and identifies an undersampling error that dominates for time steps exceeding a cutoff-dependent threshold.
Another important consequence of this mapping is that now the system only interacts with the first mode n = 0 of the chain-mapped environment
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Making Quantum Collision Models Exact
A derivation connecting collision models to chain mapping claims to make collision models numerically exact and identifies an undersampling error that dominates for time steps exceeding a cutoff-dependent threshold.