A5058829150- Quantum Information and Cryptography
- Photonic and Optical Devices
- Neural Networks and Reservoir Computing
- Quantum Computing Algorithms and Architecture
- Mechanical and Optical Resonators
- Optical Network Technologies
- Orbital Angular Momentum in Optics
- Photorefractive and Nonlinear Optics
- Quantum Mechanics and Applications
- Optical and Acousto-Optic Technologies
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Fiber Laser Technologies
Technical University of Denmark
2022-2024
The measurement of physical parameters is one the main pillars science. A classic example optical phase enabled by interferometry where best sensitivity achievable with N photons scales as 1/N - known Heisenberg limit . To achieve estimation at limit, it has been common to consider protocols based on highly complex NOON states light. However, despite decades research and several experimental explorations, there no demonstration deterministic reaching or even surpassing shot noise limit. Here...
Recent advancements in quantum technologies have opened new horizons for exploring the physical world ways once deemed impossible. Central to these breakthroughs is concept of advantage, where systems outperform their classical counterparts solving specific tasks. While much attention has been devoted computational speedups, advantage learning remains a largely untapped frontier. Here, we present photonic implementation quantum-enhanced protocol probability distribution multimode bosonic...
Abstract We demonstrate the generation, 40 km fiber transmission, and homodyne detection of single-mode squeezed states light at 1550 nm using real-time phase control a locally generated local oscillator (LO), often called ‘real LO’ or ‘local LO’. The system was able to stably measure up around 3.7 dB noise suppression with uncertainty 2.5°, only standard telecom-compatible components field-programmable gate array. compactness, low degree complexity efficacy implemented scheme makes it...
We show that quantum entanglement can provide an exponential advantage in learning properties of a bosonic continuous-variable (CV) system. The task we consider is estimating probabilistic mixture displacement operators acting on n modes, called random channel. prove if the modes are not entangled with ancillary memory, then channel must be sampled number times order to estimate its characteristic function reasonable precision; this lower bound sample complexity applies even inputs and...
Squeezed states are essential for continuous variable (CV) quantum information processing, with wide-ranging applications in computing, sensing and communications. Integrated photonic circuits provide a scalable, convenient platform building large CV circuits. Thin-film Lithium Niobate (TFLN) is particularly promising due to its low propagation loss, efficient parametric down conversion, fast electro-optical modulation. In this work, we demonstrate squeezed light source on an integrated TFLN...
Squeezed quantum states are the fundamental building block for continuous-variable computing. We demonstrate a squeezed light source on an integrated LNOI platform with shot noise reduction of 0.5 dB without periodic poling.
We show that quantum entanglement can provide an exponential advantage in learning properties of a bosonic continuous-variable (CV) system. The task we consider is estimating probabilistic mixture displacement operators acting on $n$ modes, called random channel. prove if the modes are not entangled with ancillary memory, then channel must be sampled number times order to estimate its characteristic function reasonable precision; this lower bound sample complexity applies even inputs and...
The measurement of physical parameters is one the main pillars science. A classic example optical phase enabled by interferometry where best sensitivity achievable with N photons scales as 1/N - known Heisenberg limit . To achieve estimation at limit, it has been common to consider protocols based on highly complex NOON states light. However, despite decades research and several experimental explorations, there no demonstration deterministic reaching or even surpassing shot noise limit. Here...
Variational quantum algorithms (VQAs) are hybrid quantum-classical approaches used for tackling a wide range of problems on noisy intermediate-scale (NISQ) devices. Testing these relevant hardware is crucial to investigate the effect noise and imperfections assess their practical value. Here, we implement variational algorithm designed optimized parameter estimation continuous variable platform based squeezed light, key component high-precision optical phase estimation. We ability identify...
We demonstrate the generation, 40 km fiber transmission, and homodyne detection of single-mode squeezed states light at 1550 nm using real-time phase control a locally generated local oscillator, often called "real oscillator" or "local oscillator". The system was able to stably measure up around 3.7 dB noise suppression with uncertainty 2.5$^\circ$, only standard telecom-compatible components field-programmable gate array (FPGA). compactness, low degree complexity efficacy implemented...