Article
Physics, Applied
Michael Hoese, Michael K. Koch, Felix Breuning, Niklas Lettner, Konstantin G. Fehler, Alexander Kubanek
Summary: This research demonstrates the successful generation of random numbers based on quantum properties. By manipulating and aligning the emission directionality, photons are emitted within a symmetric emission profile of defect centers. The randomness of the generated numbers is proven, and the scheme can be extended to the generation of random numbers using coherent single photons, potentially for solid-state quantum communication.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Joaquin Guimbao, Lorenzo Sanchis, Lukas M. Weituschat, Jose M. Llorens, Pablo A. Postigo
Summary: This paper proposes a platform that enables perfect indistinguishability at high temperature through the optimization of a five-dipole-coupled-emitter system coupled to a cavity. The authors also introduce a novel machine-learning approach to reduce computational time for optimization. This strategy opens up possibilities for optimizing different photonic structures for quantum information applications.
Article
Optics
Xin Wang, Pengfei Zhang, Gang Li, Tiancai Zhang
Summary: A scheme is proposed to enhance the coupling efficiency of photons from a single quantum emitter into a hole-tailored nanofiber, achieving a coupling efficiency of 62.8% and broad application prospects.
Article
Materials Science, Multidisciplinary
Junxiao Yuan, Yidong Hou, Zenghui Yang, Feiliang Chen, Qian Li
Summary: GaN with atom defects is a promising material for single-photon emitters (SPEs) due to its room-temperature working conditions, high emission rate, narrow emission line-width, and mature processing technology. This study predicts and identifies two intrinsic point defects, N-Ga and NGaVN, in GaN that can be responsible for the observed SPEs. The results provide insights into the SPE emission mechanism in GaN and bridge the gap between realized SPEs and the underlying physical mechanism.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Quantum Science & Technology
Shahram MohammadNejad, Pouya Nosratkhah, Hossein Arab
Summary: With the growth of quantum technology and its applications in non-laboratory environments, the usability of quantum systems at room temperature is becoming increasingly important. This article discusses the challenges and methods involved in creating stable and efficient single-photon emitters suitable for room temperature applications, including the history, principles, characterizing parameters, and measuring approaches related to these sources, as well as the comparison of different materials and structures.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Quantum Science & Technology
Zachariah O. Martin, Alexander Senichev, Samuel Peana, Benjamin J. Lawrie, Alexei S. Lagutchev, Alexandra Boltasseva, Vladimir M. Shalaev
Summary: A robust process for fabricating intrinsic single-photon emitters in silicon nitride has been established, showing promise for quantum applications. The photophysical properties of these emitters are probed through measurements of optical transition wavelengths, linewidths, and photon antibunching as a function of temperature. Insight into the potential for lifetime-limited linewidths is provided through measurements of inhomogeneous and temperature-dependent broadening of the zero-phonon lines.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Nanoscience & Nanotechnology
Marianna D'Amato, Qi Ying Tan, Quentin Glorieux, Alberto Bramati, Cesare Soci
Summary: A chemical approach was used to synthesize a family of colloidal mixed-cation perovskite quantum dots that exhibit highly photostable and compositionally tunable single photon emission at room temperature, covering a wide range of visible wavelengths. By tailoring the stoichiometry of the organic formamidinium cation, the electronic band structure of the perovskite quantum dots can be detuned while maintaining their excellent single photon emission characteristics. These mixed-cation perovskite quantum dots provide a new platform for color-tunable single photon emitters that can be easily integrated into various quantum photonic devices.
Article
Physics, Multidisciplinary
Jaromir Fiurasek, Lukas Lachman, Radim Filip
Summary: The research presents criteria for certifying quantum non-Gaussianity, applicable to arbitrary multimode states and experiments with broadband sources and single-photon detectors. Additionally, a criterion based on the vacuum probability and mean photon number of the state has been formulated.
NEW JOURNAL OF PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Patrick Laferriere, Sofiane Haffouz, David B. Northeast, Philip J. Poole, Robin L. Williams, Dan Dalacu
Summary: In this study, high purity single photon emission at 1.31μm was achieved using deterministically positioned InP photonic waveguide nanowires. The single photon collection efficiency at first lens was found to be 27.6%, and the probability of multiphoton emission was 0.021. The performance of the source was also evaluated at different temperatures, showing an increase in multiphoton emission probability with temperature.
Article
Chemistry, Multidisciplinary
Maxim Rakhlin, Sergey Sorokin, Dmitrii Kazanov, Irina Sedova, Tatiana Shubina, Sergey Ivanov, Vladimir Mikhailovskii, Alexey Toropov
Summary: This study introduces single photon emitters for the green-yellow spectral range, utilizing a CdSe/ZnSe quantum dot inside a semiconductor tapered nanocolumn acting as a nanoantenna. Despite the presence of multiple optical modes, the nanoantenna efficiently collects and outputs the quantum dot radiation. Arrays of such emitters, fabricated using focused ion beam etching from a II-VI/III-V heterostructure grown via molecular beam epitaxy, demonstrate promising potential for secure free space optical communication lines with an average count rate exceeding 5 MHz and a low second-order correlation function at 220 K.
Article
Optics
S. Rodt, S. Reitzenstein
Summary: Research on integrated quantum circuits has rapidly developed in recent years, aiming to achieve scalable quantum functionality on robust chips and pave the way for quantum advantage in quantum computing and multipartite quantum networks; major challenges currently facing the field include integrating all necessary components monolithically on chip to fully exploit the potential of integrated quantum nanophotonics.
Article
Chemistry, Multidisciplinary
Wei Wang, Leighton O. Jones, Jia-Shiang Chen, George C. Schatz, Xuedan Ma
Summary: Researchers have successfully achieved single-photon emission by generating defects through UV light in vacuum, while defects created in air do not possess this characteristic. They attribute the defects generated in vacuum to unpassivated sulfur vacancies, which have highly localized midgap states that give rise to single-photon emission.
Article
Optics
Yijing Huang, Zhibo Dang, Xiao He, Zheyu Fang
Summary: This review presents a comprehensive overview of the physical mechanisms and techniques for fabricating high-quality single-photon emitters (SPEs) in layered hexagonal boron nitride (hBN), as well as the latest developments and applications in emerging areas. The modulation of SPEs in hBN and possible research directions for future device applications are also discussed.
CHINESE OPTICS LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Alexander Senichev, Samuel Peana, Zachariah O. Martin, Omer Yesilyurt, Demid Sychev, Alexei S. Lagutchev, Alexandra Boltasseva, Vladimir M. Shalaev
Summary: This work successfully integrates intrinsic single-photon emitters discovered in silicon nitride material with planar waveguides composed of low-autofluorescence silicon nitride, and demonstrates the coupling of single-photon emission with the waveguide mode through experiments. The results of this study pave the way for the realization of scalable, technology-ready quantum photonic integrated circuitry efficiently interfaced with solid-state quantum emitters.
Article
Optics
Xin-Ke Li, Sheng-Li Ma, Ya-Long Ren, Ji-Kun Xie, Fu-Li Li
Summary: We investigate the hybrid quantum system of a superconducting flux qubit, a single electronic spin associated with a negatively charged nitrogen vacancy (NV) center in diamond, and a high-quality magnetized nanomechanical resonator (NAMR). The study shows that the quantized motion of the NAMR can strongly couple to both the NV spin and the flux qubit, enabling faster and more robust quantum state transfer. This work may provide a promising approach for quantum information processing based on hybrid solid-state quantum systems.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Vladyslav C. Usenko, Radim Filip
Article
Physics, Multidisciplinary
D. B. Higginbottom, L. Slodicka, G. Araneda, L. Lachman, R. Filip, M. Hennrich, R. Blatt
NEW JOURNAL OF PHYSICS
(2016)
Article
Physics, Multidisciplinary
Luo Qi, Mathieu Manceau, Andrea Cavanna, Fabian Gumpert, Luigi Carbone, Massimo de Vittorio, Alberto Bramati, Elisabeth Giacobino, Lukas Lachman, Radim Filip, Maria Chekhova
NEW JOURNAL OF PHYSICS
(2018)
Article
Physics, Multidisciplinary
P. Obsil, L. Lachman, T. Pham, A. Lesundak, V. Hucl, M. Cizek, J. Hrabina, O. Cip, L. Slodicka, R. Filip
PHYSICAL REVIEW LETTERS
(2018)
Article
Quantum Science & Technology
Ivo Straka, Lukas Lachman, Josef Hlousek, Martina Mikova, Michal Micuda, Miroslav Jezek, Radim Filip
NPJ QUANTUM INFORMATION
(2018)
Article
Physics, Multidisciplinary
J. Mika, L. Podhora, L. Lachman, P. Obsil, J. Hlousek, M. Jezek, R. Filip, L. Slodicka
NEW JOURNAL OF PHYSICS
(2018)
Article
Multidisciplinary Sciences
Laszlo Ruppert, Radim Filip
SCIENTIFIC REPORTS
(2017)
Article
Physics, Multidisciplinary
Lukas Lachman, Ivo Straka, Josef Hlousek, Miroslav Jezek, Radim Filip
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
Lukas Lachman, Radim Filip
NEW JOURNAL OF PHYSICS
(2019)
Article
Physics, Multidisciplinary
Lukas Lachman, Radim Filip
Summary: Photon coincidences play a crucial role in quantum technologies by revealing nonlinear quantum processes in matter and certifying a new quality of photon sources. The criteria for quantum non-Gaussian two-photon coincidences reject states emerging from Gaussian parametric processes, which often limit applications in quantum technologies. Additionally, the robustness of quantum non-Gaussian coincidences is analyzed and compared to the heralded quantum non-Gaussianity of single photons.
PHYSICAL REVIEW LETTERS
(2021)
Review
Engineering, Electrical & Electronic
Lukas Lachman, Radim Filip
Summary: This review introduces the theoretical analyses and applications of quantum non-Gaussian states of photons and phonons. It covers the operational criteria for tolerant photons and their extension to quantum non-Gaussian photon coincidences. It also compares the sensing capability and robustness of high-quality phononic Fock states.
PROGRESS IN QUANTUM ELECTRONICS
(2022)
Article
Quantum Science & Technology
Jaromir Mika, Lukas Lachman, Tomas Lamich, Radim Filip, Lukas Slodicka
Summary: The distributed quantum information processing and hybridization of quantum platforms require high-quality light-matter interaction and efficient quantum interfaces. This study demonstrates the generation of light with provably quantum non-Gaussian (QNG) features from a warm atomic ensemble, achieved through fast resonant excitation, large spectral bandwidth, and low absorption loss.
NPJ QUANTUM INFORMATION
(2022)
Article
Physics, Multidisciplinary
Luca Innocenti, Lukas Lachman, Radim Filip
Summary: The article presents operational criteria for detecting nonclassicality of quantum states. These criteria can be implemented in experiments with different systems such as light, atoms, solid-state systems, and mechanical oscillators.
PHYSICAL REVIEW LETTERS
(2023)
