title: Confined quantum time of arrivals.
abstract: We show that formulating the quantum time of arrival problem in a segment of the real line suggests rephrasing the quantum time of arrival problem to finding states that evolve to unitarily collapse at a given point at a definite time. For the spatially confined particle, we show that the problem admits a solution in the form of an eigenvalue problem of a compact and self-adjoint time of arrival operator derived by a quantization of the classical time of arrival, which is canonically conjugate with the Hamiltonian in a closed subspace of the Hilbert space.
authors.affiliation: Theoretical Physics Group, National Institute of Physics, University of the Philippines, Diliman, Quezon City, 1101 Philippines. eric.galapon@upd.edu.ph
authors.forename: Eric A
authors.initials: EA
authors.lastname: Galapon
authors.forename: Roland F
authors.initials: RF
authors.lastname: Caballar
authors.forename: Ricardo T
authors.initials: RT
authors.lastname: Bahague