title: Localized single-photon wave functions in free space.
abstract: We solve the joint open problems of photon localization and single-photon wave functions in the context of spontaneous emission from an excited atom in free space. Our wave functions are well-defined members of a discrete orthonormal function set. Both the degree and shape of the localization are controlled by entanglement mapping onto the atom wave function, even though the atom is remote from the photon.
authors.affiliation: Center for Quantum Information and Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA.
authors.forename: K W
authors.initials: KW
authors.lastname: Chan
authors.forename: C K
authors.initials: CK
authors.lastname: Law
authors.forename: J H
authors.initials: JH
authors.lastname: Eberly