Capacities of linear quantum optical systems
arXiv:1201.4747 · doi:10.1103/PhysRevA.85.062314
Abstract
A wide variety of communication channels employ the quantized electromagnetic field to convey information. Their communication capacity crucially depends on losses associated to spatial characteristics of the channel such as diffraction and antenna design. Here we focus on the communication via a finite pupil, showing that diffraction is formally described as a memory channel. By exploiting this equivalence we then compute the communication capacity of an optical refocusing system, modeled as a converging lens. Even though loss of information originates from the finite pupil of the lens, we show that the presence of the refocusing system can substantially enhance the communication capacity. We mainly concentrate on communication of classical information, the extension to quantum information being straightforward.
11 pages, 3 figures. v2: minor changes, close to the published version
References in corpus (16)
- Gaussian Quantum Information
- Free-Space distribution of entanglement and single photons over 144 km
- Quantum Illumination with Gaussian States
- Gaussian-state quantum-illumination receivers for target detection
- Continuous Variable Quantum Cryptography using Two-Way Quantum Communication
- Direct and Reverse Secret-Key Capacities of a Quantum Channel
- Characterization of Collective Gaussian Attacks and Security of Coherent-State Quantum Cryptography
- Quantum Capacities of Bosonic Channels
- Computable bounds for the discrimination of Gaussian states
- One-mode Bosonic Gaussian channels: a full weak-degradability classification
- Multi-mode bosonic Gaussian channels
- Quantum Reading Capacity
- Quantum target detection using entangled photons
- Experimental implementation of unambiguous quantum reading
- On the classical capacity of quantum Gaussian channels
- Enhanced Quantum Communication via Optical Refocusing
Cited by in corpus (9)
- Quantum channels and memory effects
- Ultimate precision bound of quantum and sub-wavelength imaging
- Entanglement Reactivation in Separable Environments
- Subwavelength quantum imaging with noisy detectors
- Quantum reading capacity under thermal and correlated noise
- Why a hole is like a beam splitter--a general diffraction theory for multimode quantum states of light
- Single-photon super-resolved spectroscopy from spatial-mode demultiplexing
- Position measurement and the Huygens-Fresnel principle: A quantum model of Fraunhofer diffraction for polarized pure states
- Non-Markovian Reactivation of Quantum Relays