Physics – Quantum Physics
Scientific paper
2006-09-07
J. Phys. A: Math. Gen. 39 (2006) 14447-14463
Physics
Quantum Physics
19 pages, 1 figure; minor changes, references corrected; accepted for publication in Journal of Physics A: Mathematical and Ge
Scientific paper
10.1088/0305-4470/39/46/014
We investigate a fully quantum mechanical spin model for the detection of a moving particle. This model, developed in earlier work, is based on a collection of spins at fixed locations and in a metastable state, with the particle locally enhancing the coupling of the spins to an environment of bosons. Appearance of bosons from particular spins signals the presence of the particle at the spin location, and the first boson indicates its arrival. The original model used discrete boson modes. Here we treat the continuum limit, under the assumption of the Markov property, and calculate the arrival-time distribution for a particle to reach a specific region.
Hegerfeldt Gerhard C.
Neumann Jens Timo
Schulman Lawrence S.
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