Article
Optics
S. Francesconi, A. Raymond, R. Duhamel, P. Filloux, A. Lemaitre, P. Milman, M. I. Amanti, F. Baboux, S. Ducci
Summary: We demonstrate a chip-integrated semiconductor source that combines polarization and frequency entanglement, allowing the generation of entangled biphoton states in a hybrid degree of freedom without post-manipulation. The device is based on type-II spontaneous parametric downconversion in a counterpropagating phasematching scheme, enabling the direct generation of polarization-frequency entangled photons at room temperature and telecom wavelength. The state entanglement is quantified by a combined measurement of the joint spectrum and Hong-Ou-Mandel interference.
PHOTONICS RESEARCH
(2023)
Article
Optics
Hui-min Zhao, Xiao-jun Zhang, M. Artoni, G. c. la Rocca, Jin-hui Wu
Summary: Strongly correlated photon pairs can be generated with high rates and brightnesses using enhanced nonlocal optical nonlinearities in cold atoms, leading to a dark state with a large population imbalance. This scheme works with resonant light fields, while minimizing linear absorption and Raman gain.
Article
Nanoscience & Nanotechnology
Felicien Appas, Othmane Meskine, Aristide Lemaitre, Jose Palomo, Florent Baboux, Maria I. Amanti, Sara Ducci
Summary: The ability to combine advanced functionalities on a single chip is crucial for both classical and quantum photonic technologies. Generating and handling orthogonally polarized photon pairs on a chip is a central challenge for scalable quantum photonics circuits. In this study, a monolithic AlGaAs chip was used to generate broadband orthogonally polarized photon pairs and split their polarizations, achieving a separation rate of 85% over a 60 nm bandwidth. The results demonstrate the validity of this approach and represent a significant step toward miniaturized and easy-to-handle photonic devices for quantum information processing.
Article
Quantum Science & Technology
Dong-Xu Chen, Yu Zhang, Jun-Long Zhao, Qi-Cheng Wu, Yu-Liang Fang, Chui-Ping Yang, Franco Nori
Summary: In this study, both forms of the wave-particle duality relations were experimentally confirmed using asymmetric beam interference and the polarization degree of freedom of photons as a which-way detector. The results showed that more path information was obtained in the quadratic case, revealing the difference between the two duality relations.
NPJ QUANTUM INFORMATION
(2022)
Article
Optics
Rikizo Ikuta
Summary: This study investigates the wave-particle duality of light and the intensity interferometric effect in the Hong-Ou-Mandel interferometer. The results show that classical light and nonclassical light exhibit different characteristics in terms of wave-particle duality, with nonclassical light being able to simultaneously display larger which-path information and intensity interference.
Review
Physics, Multidisciplinary
K. G. Katamadze, A. Pashchenko, A. Romanova, S. P. Kulik
Summary: This article discusses the importance of biphoton fields in modern quantum optics, explores the relationship between the spectrum of biphoton fields and correlations, and describes their characteristics, applications, and generation methods.
Article
Optics
Y. Yugra, C. Montenegro, F. De Zela
Summary: This study focuses on X-type mixed states and experimentally verifies alternative constraints for concurrence and polarization. The results are applicable to mixed two-qubit states as well as classical light.
Article
Physics, Multidisciplinary
Yanet Alvarez, Marcelo Losada, Mariela Portesi, Gustavo M. Bosyk
Summary: Quantum coherence is an important resource for quantum information processing tasks, but it is easily affected by environmental noise, leading to a loss of system purity. This limits the amount of quantum coherence and gives rise to a complementarity relation between coherence and mixedness. Previous studies have characterized this complementarity using inequalities, but this study proposes an alternative approach based on majorization theory, using vectorial quantifiers rather than scalar measures. The results provide a deeper insight into the relation between quantum coherence and mixedness.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
Mulong Liu, Huimin Huang, Zhizhou Lu, Wenquan Zhou, Yuanyuan Wang, Yanan Cai, Wei Zhao
Summary: We demonstrated that strong stimulated Raman scattering in silicon and germanium microresonators can generate stable and breathing dark pulses, bypassing traditional complex approaches. Multi-photon absorption and free carriers assist in dark pulse excitation. Additionally, distinct dark breather dynamics were observed in Si and Ge, different from dark soliton breathers dominated solely by Kerr effect. High-order dispersion engineering can generate octave spanning mid-infrared microcombs, impacting the breathing dynamics of dark pulses.
NEW JOURNAL OF PHYSICS
(2022)
Article
Optics
Yusef Maleki, Jiru Liu, M. Suhail Zubairy
Summary: This paper explores the wave-particle duality in quantum eraser, quantitatively understood through the duality-entanglement relation, which enables partial recovery of quantum interference by controllable partial erasure of the which-path information.
Article
Optics
Santiago Lopez-Huidobro, Markus Lippl, Nicolas Y. Joly, Maria Chekhova
Summary: The study presents a tunable biphoton source based on a xenon-filled hollow-core photonic crystal fiber, where tunability is achieved by adjusting the gas pressure inside the fiber, overcoming the main limitations of solid-core fiber-based biphoton sources. Within a certain pressure range, the frequencies of the biphoton pair can be continuously adjusted, with a separation of frequencies reaching more than one octave.
Article
Quantum Science & Technology
Marcos L. W. Basso, Jonas Maziero
Summary: This article investigates the application of complementarity relations in quantum mechanics, exploring the relationships between quantum coherence, quantum entanglement, and predictability. Quantum circuits are provided to experimentally test these relationships, and a resource theory for predictability is established. The study offers new insights and theoretical foundations for resource theory.
QUANTUM INFORMATION PROCESSING
(2022)
Article
Computer Science, Artificial Intelligence
Shashi Narayan, Joshua Maynez, Reinald Kim Amplayo, Kuzman Ganchev, Annie Louis, Fantine Huot, Anders Sandholm, Dipanjan Das, Mirella Lapata
Summary: In this work, the authors propose using planning as an intermediate representation to improve conditional generation models. They introduce a new conceptualization of text plans as question-answer (QA) pairs and enhance existing datasets with QA blueprints. Transformer-based models are developed to incorporate the blueprints, resulting in more factual and controlled generation outputs, as demonstrated across various metrics and datasets.
TRANSACTIONS OF THE ASSOCIATION FOR COMPUTATIONAL LINGUISTICS
(2023)
Article
Physics, Multidisciplinary
Jonas Maziero, Marcos L. W. Basso, Lucas C. Celeri
Summary: Complete complementarity relations constrain the local predictability, local coherence, and entanglement of bipartite pure states. In this article, the authors extend these relations to general pure initial states and establish a general connection between pre-measurement local predictability and coherence, and the distributed entanglement in the entanglement swapping protocol (ESP). Experimental verification of these theoretical results is conducted using IBM's quantum computers.
Article
Physics, Multidisciplinary
Bingyu Hu, Ming-Jing Zhao
Summary: This paper investigates the trade-off relation of geometric coherence in qubit systems. An upper bound for geometric coherence is derived based on the purity of quantum states, and a complementarity relation between quantum coherence and mixedness is established. Additionally, the quantum uncertainty relations of geometric coherence on different measurement bases are derived, and the complementarity relation between the minimum error probability for discriminating a pure-states ensemble and the mixedness of quantum states is established.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
