A5091142854- Quantum Information and Cryptography
- Optical Network Technologies
- Orbital Angular Momentum in Optics
- Neural Networks and Reservoir Computing
- Photonic and Optical Devices
- Quantum Mechanics and Applications
- Chaos-based Image/Signal Encryption
- Quantum optics and atomic interactions
- Random lasers and scattering media
- Quantum Computing Algorithms and Architecture
- Mechanical and Optical Resonators
- Optical Wireless Communication Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Optical Polarization and Ellipsometry
- Biometric Identification and Security
- Statistical Mechanics and Entropy
- Photonic Crystal and Fiber Optics
- Plasmonic and Surface Plasmon Research
- Advanced Photonic Communication Systems
- Near-Field Optical Microscopy
- Probabilistic and Robust Engineering Design
- Biofield Effects and Biophysics
- Advanced Fiber Laser Technologies
Linköping University
2020-2024
University of Bío-Bío
2024
University of Concepción
2018
Abstract The recent development of perovskite light emitting diodes (PeLEDs) has the potential to revolutionize fields optical communication and lighting devices, due their simplicity fabrication outstanding properties. Here we demonstrate that PeLEDs can also be used in field quantum technologies by implementing a highly-secure random number generator (QRNG). Modern QRNGs certify privacy are posed replace classical generators applications such as encryption gambling, therefore need cheap,...
Time-bin (TB) and energy-time (ET) entanglements are crucial resources for long-distance quantum information processing. However, their standard implementations suffer from the so-called post-selection loophole that allows classical simulation thus prevents advantage. The has been addressed in proof-of-principle experiments. An open problem though is to close it real-life applications based on integrated technologies. This especially important since, so far, all sources of TB ET loophole....
Photonic spatial quantum states are a subject of great interest for applications in communication. One important challenge has been how to dynamically generate these using only fiber-optical components. Here we propose and experimentally demonstrate an all-fiber system that can switch between any general transverse qubit state based on linearly polarized modes. Our platform is fast optical Sagnac interferometer combined with photonic lantern few-mode fibers. We show switching times modes the...
Wave-particle duality is one of the most notable and counterintuitive features quantum mechanics, illustrating that two incompatible observables cannot be measured simultaneously with arbitrary precision. In this work, we experimentally demonstrate equivalence wave-particle entropic uncertainty relations using orbital angular momentum (OAM) states light. Our experiment uses an innovative reconfigurable platform composed few-mode optical fibers photonic lanterns, showcasing versatility...
The orbital angular momentum (OAM) spatial degree of freedom light has been widely explored in many applications, including telecommunications, quantum information, and light-based micromanipulation. ability to separate distinguish between the different transverse modes is called mode sorting or demultiplexing, it essential recover encoded information such applications. An ideal d sorter should be able faithfully modes, with minimal losses, have outputs fast response times. All previous...
Quantum random number generators (QRNG) are based on the naturally measurement results performed individual quantum systems. Here, we demonstrate a branching-path photonic QRNG implemented with Sagnac interferometer tunable splitting ratio. The fine-tuning of ratio allows us to maximize entropy generated sequence numbers and effectively compensate for tolerances in components. By producing single-photons from attenuated telecom laser pulses, employing commercially-available components able...
An essential component of future quantum networks is an optical switch capable dynamically routing single photons. Here we implement such a switch, based on fiber-optical Sagnac interferometer design. The implemented with pair fast electro-optical telecom phase modulators placed inside the loop, that each modulator acts orthogonal polarization photons, in order to yield polarization-independent capability crucial for several applications. We obtain average extinction ratio more than 19 dB...
A natural choice for quantum communication is to use the relative phase between two paths of a single photon information encoding. This method was nevertheless quickly identified as impractical over long distances, and thus modification based on single-photon time bins has become widely adopted. It, however, introduces fundamental loss, which increases with dimension limits its application distances. Here solve this long-standing hurdle by using few-mode-fiber space-division-multiplexing...
In the field of cryptography, it is crucial that random numbers used in key generation are not only genuinely but also private, meaning no other party than legitimate user must have information about generated. Quantum number generators can offer both properties - fundamentally output, as well ability to implement certify amount private randomness generated, order remove some side-channel attacks. this study we introduce perovskite technology a resilient platform for photonics, where...
Wave-particle duality is one of the most striking and counter-intuitive features quantum mechanics, illustrating that two incompatible observables cannot be measured simultaneously with arbitrary precision. In this work, we experimentally demonstrate equivalence wave-particle entropic uncertainty relations using orbital angular momentum (OAM) states light. Our experiment utilizes an innovative reconfigurable platform composed few-mode optical fibers photonic lanterns, showcasing versatility...
An all-fiber setup to store and retrieve light pulses using electric control is presented. The experiment based on a Sagnac interferometer with phase modulator fabricated poled fiber internal electrodes.
We demonstrate wave-particle duality of orbital angular momentum (OAM) photonic quantum states in a few-mode optical fiber interferometer with dynamic tunable beam-splitter, opening new possibilities for fundamental and practical applications using OAM states.
Time-bin (TB) and energy-time (ET) entanglement are crucial resources for long-distance quantum information processing. Recently, major efforts have been made to produce compact high-quality sources of TB/ET entangled photons based on solid-state integrated technologies. However, these attempts failed close the so-called "post-selection loophole". Here, we present an photonic general Bell-test chip genuine (i.e., free post-selection loophole) TB ET certification. We report a violation Bell...
We show that telecom few-mode fiber Mach-Zehnder interferometers can be used for quantum communication protocols where the LP 01 and 11 a modes are employed to encode spatial qubits.
The orbital angular momentum (OAM) spatial degree of freedom light has been widely explored in many applications, including telecommunications, quantum information and light-based micro-manipulation. ability to separate distinguish between the different transverse modes is called mode sorting or demultiplexing, it essential recover encoded such applications. An ideal $d$ sorter should be able faithfully modes, with minimal losses, have outputs, fast response times. All previous sorters rely...
In this work we demonstrate an all-fiber dynamically tunable beamsplitter based on a Sagnac interferometer capable of realizing measurement-device independent protocols for certifying the privacy generated sequence.
The recent development of perovskite light emitting diodes (PeLEDs) has the potential to revolutionize fields optical communication and lighting devices, due their simplicity fabrication outstanding properties. Here we demonstrate, for first time, that PeLEDs can also be used in field quantum technologies by demonstrating a highly-secure random number generator (QRNG). Modern QRNGs certify privacy are posed replace widely adopted pseudo true classical generators applications such as...
A quantum random number generator based on few-mode fiber technology is presented. The randomness originates from measurements of spatial modal superpositions the LP 11 a and b modes. generated sequences have passed NIST tests.
We demonstrate an all-fiber platform for the generation and detection of spatial photonic states where combinations LP 01 , 11 a b modes are used. This scheme can be employed quantum communication applications.