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6 papers · 2 filters
Rapid Measurement of Quantum Systems using Feedback Control
Joshua Combes, Howard M. Wiseman, Kurt Jacobs
We introduce a feedback control algorithm that increases the speed at which a measurement extracts information about a -dimensional system by a factor that scales as . Gene…
Coherent Communication with Linear Optics
Mark M. Wilde, Todd A. Brun, Jonathan P. Dowling +1
We show how to implement several continuous-variable coherent protocols with linear optics. Noise can accumulate when implementing each coherent protocol with realistic optical dev…
Loss of entanglement in quantum mechanics due to the use of realistic measuring rods
Rodolfo Gambini, Rafael A. Porto, Jorge Pullin
We show that the use of real measuring rods in quantum mechanics places a fundamental gravitational limit to the level of entanglement that one can ultimately achieve in quantum sy…
Energy Measurements and Preparation of Canonical Phase States of a Nano-Mechanical Resonator
Kurt Jacobs, Andrew N. Jordan, Elinor K. Irish
We show that a continuous quantum non-demolition measurement of the energy of a nanomechanical resonator can be achieved by monitoring the resonator with a quantum point contact vi…
Quantum thermodynamic functions for an oscillator coupled to a heat bath
G. W. Ford, R. F. O'Connell
Small systems (of interest in the areas of nanophysics, quantum information, etc.) are particularly vulnerable to environmental effects. Thus, we determine various thermodynamic fu…
Strongly-Driven One-Atom Laser and Decoherence Monitoring
P. Lougovski, F. Casagrande, A. Lulli +1
We propose the implementation of a strongly-driven one-atom laser, based on the off-resonant interaction of a three-level atom in -configuration with a single cavity mode and th…