Atmospheric Channel Characteristics for Quantum Communication with Continuous Polarization Variables
arXiv:0910.4543 · doi:10.1007/s00340-009-3838-8
Abstract
We investigate the properties of an atmospheric channel for free space quantum communication with continuous polarization variables. In our prepare-and-measure setup, coherent polarization states are transmitted through an atmospheric quantum channel of 100m length on the roof of our institute's building. The signal states are measured by homodyne detection with the help of a local oscillator (LO) which propagates in the same spatial mode as the signal, orthogonally polarized to it. Thus the interference of signal and LO is excellent and atmospheric fluctuations are autocompensated. The LO also acts as spatial and spectral filter, which allows for unrestrained daylight operation. Important characteristics for our system are atmospheric channel influences that could cause polarization, intensity and position excess noise. Therefore we study these influences in detail. Our results indicate that the channel is suitable for our quantum communication system in most weather conditions.
6 pages, 4 figures, submitted to Applied Physics B following an invitation for the special issue "Selected Papers Presented at the 2009 Spring Meeting of the Quantum Optics and Photonics Section of the German Physical Society"
References in corpus (10)
- The Security of Practical Quantum Key Distribution
- Free-Space distribution of entanglement and single photons over 144 km
- Experimental verification of the feasibility of a quantum channel between Space and Earth
- Experimental entanglement distillation of mesoscopic quantum states
- Quantum light in the turbulent atmosphere
- Feasibility of free space quantum key distribution with coherent polarization states
- Preparation of distilled and purified continuous variable entangled states
- Experimental distillation of squeezing from non-Gaussian quantum states
- Witnessing effective entanglement in a continuous variable prepare&measure setup and application to a QKD scheme using postselection
- Quantum Filtering of Optical Coherent States
Cited by in corpus (20)
- Toward Global Quantum Communication: Beam Wandering Preserves Nonclassicality
- Satellite-Based Continuous-Variable Quantum Communications: State-of-the-Art and a Predictive Outlook
- Entanglement of Gaussian states and the applicability to quantum key distribution over fading channels
- Field Test of Classical Symmetric Encryption with Continuous Variable Quantum Key Distribution
- Atmospheric continuous-variable quantum communication
- Distribution of squeezed states through an atmospheric channel
- Atmospheric effects on continuous-variable quantum key distribution
- Free-space quantum links under diverse weather conditions
- Adaptive-optics-enabled quantum communication: A technique for daytime space-to-Earth links
- Homodyne detection for atmosphere channels
- Gaussian entanglement in the turbulent atmosphere
- Complete elimination of information leakage in continuous-variable quantum communication channels
- Entanglement and phase properties of noisy N00N states
- Quantum teleportation through atmospheric channels
- Numerical simulations of atmospheric quantum channels
- A symmetrization technique for continuous-variable quantum key distribution
- Time correlations in atmospheric quantum channels
- Nonclassicality and Bell nonlocality in atmospheric links
- Circular-beam approximation for quantum channels in a turbulent atmosphere
- Enhanced Uplink Quantum Communication with Satellites via Downlink Channels