A5038985973- Quantum Information and Cryptography
- Orbital Angular Momentum in Optics
- Quantum Mechanics and Applications
- Quantum Computing Algorithms and Architecture
- Random lasers and scattering media
- Optical Network Technologies
- Quantum optics and atomic interactions
- Spectroscopy and Quantum Chemical Studies
- Quantum, superfluid, helium dynamics
- Photonic and Optical Devices
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Photoacoustic and Ultrasonic Imaging
- Chaos-based Image/Signal Encryption
- Neural Networks and Reservoir Computing
Institute for Quantum Optics and Quantum Information Innsbruck
2021-2023
Austrian Academy of Sciences
2021-2023
Vienna Center for Quantum Science and Technology
2021-2023
TU Wien
2019
Entanglement distribution is at the heart of most quantum communication protocols. Inevitable loss photons along channels a major obstacle for distributing entangled over long distances, as no-cloning theorem forbids information to simply be amplified way done in classical communication. It therefore desirable every successfully transmitted photon pair carry much entanglement possible. Spontaneous parametric down-conversion (SPDC) creates multiple high-dimensional degrees freedom...
In state-of-the-art quantum key distribution (QKD) systems, the main limiting factor in increasing generation rate is timing resolution detecting photons. Here, we present and experimentally demonstrate a strategy to overcome this limitation, also for high-loss long-distance implementations. We exploit intrinsic wavelength correlations of entangled photons using multiplexing generate secure from polarization entanglement. The presented approach can be integrated into both fiber-...
TheThe successful employment of high-dimensional quantum correlations and its integration in telecommunication infrastructures is vital cutting-edge technologies for increasing robustness key generation rate. Position-momentum Einstein-Podolsky-Rosen (EPR) entanglement photon pairs are a promising resource such correlations. Here, we experimentally certify EPR generated by spontaneous parametric down-conversion (SPDC) nonlinear crystal with type-0 phase-matching at wavelength the first time....
The thorough characterization of entangled-photon sources is vital for their optimal use in quantum communication. However, this task not trivial at telecommunication wavelengths. While cameras and spectrometers are well developed visible near-infrared spectra, does apply the mid-infrared range. Here, we present a spatial spectral photon pairs emitted type-0 phase-matched spontaneous parametric downconverted source. We experimentally show how these properties modified by crystal temperature....
Ultracold neutrons (UCNs) are formidable probes in precision tests of gravity. With their negligible electric charge, dielectric moment, and polarizability they naturally evade some the problems plaguing gravity experiments with atomic or macroscopic test bodies. Taking advantage this fact, q B ounce collaboration has developed a technique – resonance spectroscopy (GRS) to study bound quantum states UCN field Earth. This is used as high-precision tool search for hypothetical Non-Newtonian on...
Abstract Entanglement distribution is at the heart of most quantum communication protocols. Inevitable loss photons along channels a major obstacle for distributing entangled over long distances, as no-cloning theorem forbids information to simply be amplified way done in classical communication. It therefore desirable every successfully transmitted photon pair carry much entanglement possible. Spontaneous parametric down-conversion (SPDC) creates multiple high-dimensional degrees freedom...
We introduce a general scheme for increasing secure key rates in entanglement-based cryptography exploiting multiple degrees of freedom. experimentally exemplify this through spatial and wavelength multiplexing. Scalability our approach is demonstrated.
Entanglement distribution is at the heart of most quantum communication protocols. Inevitable loss photons along channels a major obstacle for distributing entangled over long distances, as no-cloning theorem forbids information to simply be amplified way done in classical communication. It therefore desirable every successfully transmitted photon pair carry much entanglement possible. Spontaneous parametric down-conversion (SPDC) creates multiple high-dimensional degrees freedom...
The thorough characterization of entangled-photon sources is vital for their optimal use in quantum communication. However, this task not trivial at telecommunication wavelengths. While cameras and spectrometers are well developed visible near-infrared spectra, that does apply the mid-infrared range. Here we present a spatial spectral photon pairs emitted type-0 phase-matched spontaneous parametric down-converted source. We experimentally show how these properties modified by crystal...
We introduce a general scheme for increasing secure key rates in entanglement-based cryptography exploiting multiple degrees of freedom. experimentally exemplify this through spatial and wavelength multiplexing. Scalability our approach is demonstrated.