Arrival time statistics from an absorbing many-particle detector can identify the single-particle momentum even in a spatially uniform beam, with explicit Fisher information limits in the sparse-beam case.
Tunneling Times with Covariant Measurements
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Fisher information from quantum many-particle arrival time measurements
Arrival time statistics from an absorbing many-particle detector can identify the single-particle momentum even in a spatially uniform beam, with explicit Fisher information limits in the sparse-beam case.