title: Quantum State Reduction by Matter-Phase-Related Measurements in Optical Lattices.
abstract: A many-body atomic system coupled to quantized light is subject to weak measurement. Instead of coupling light to the on-site density, we consider the quantum backaction due to the measurement of matter-phase-related variables such as global phase coherence. We show how this unconventional approach opens up new opportunities to affect system evolution. We demonstrate how this can lead to a new class of final states different from those possible with dissipative state preparation or conventional projective measurements. These states are characterised by a combination of Hamiltonian and measurement properties thus extending the measurement postulate for the case of strong competition with the system's own evolution.
authors.affiliation: Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Kozlowski
authors.affiliation: Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.|CONACYT, Instituto Nacional de Astrofísica, Óptica y Electrónica, Calle Luis Enrique Erro No. 1, Sta. María Tonantzintla, Pue. CP 72840, México.
authors.forename: Santiago F
authors.initials: SF
authors.lastname: Caballero-Benitez
authors.affiliation: Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.|St. Petersburg State University, Universitetsky pr. 26, 198504 St. Petersburg, Russia.
authors.forename: Igor B
authors.initials: IB
authors.lastname: Mekhov