EPJ Quantum Technology最新文献_第4页

Estimating the impact of light pollution on quantum communication between QEYSSat and Canadian quantum ground station sites 估计光污染对QEYSSat和加拿大量子地面站站点之间量子通信的影响

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-02-27 DOI: 10.1140/epjqt/s40507-025-00331-8

Mathew Yastremski, Paul J. Godin, Nouralhoda Bayat, Sungeun Oh, Ziheng Chang, Katanya B. Kuntz, Daniel Oblak, Thomas Jennewein

{"title":"Estimating the impact of light pollution on quantum communication between QEYSSat and Canadian quantum ground station sites","authors":"Mathew Yastremski, Paul J. Godin, Nouralhoda Bayat, Sungeun Oh, Ziheng Chang, Katanya B. Kuntz, Daniel Oblak, Thomas Jennewein","doi":"10.1140/epjqt/s40507-025-00331-8","DOIUrl":"10.1140/epjqt/s40507-025-00331-8","url":null,"abstract":"<div><p>Satellite to ground quantum communication typically operates at night to reduce background signals, however it remains susceptible to noise from light pollution of the night sky. In this study we compare several methodologies for determining whether a Quantum Ground Station (QGS) site is viable for exchanging quantum signals with the upcoming Quantum Encryption and Science Satellite (QEYSSat) mission. We conducted ground site characterization studies at three locations in Canada: Waterloo, Ontario, Calgary, Alberta, and Priddis, Alberta. Using different methods we estimate the background counts expected to leak into the satellite-ground quantum channel, and determined whether the noise levels could prevent a quantum key transfer. We also investigate how satellite data recorded from the Visible Infrared Imaging Radiometer Suite (VIIRS) can help estimate conditions of a particular site, and find reasonable agreement with the locally recorded data. Our results indicate that the Waterloo, Calgary, and Priddis QGS sites should allow both quantum uplinks and downlinks with QEYSSat, despite their proximity to urban centres. Furthermore, our approach allows the use of satellite borne instrument data (VIIRS) to remotely and efficiently determine the potential of a ground site.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00331-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Celebrating the International Year of Quantum Science and Technology 庆祝国际量子科学技术年

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-02-27 DOI: 10.1140/epjqt/s40507-025-00336-3

Kai Bongs

引用次数: 0

Alternative pipeline for option pricing using quantum computers 使用量子计算机的期权定价替代管道

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-02-25 DOI: 10.1140/epjqt/s40507-025-00328-3

Alberto Manzano, Gonzalo Ferro, Álvaro Leitao, Carlos Vázquez, Andrés Gómez

引用次数: 0

Low-cost ODMR experiments with nitrogen-vacancy centers in diamonds: a didactical approach to theory and experiment 金刚石中氮空位中心的低成本ODMR实验：理论与实验的教学方法

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-02-21 DOI: 10.1140/epjqt/s40507-025-00326-5

Nils Haverkamp, Alexander Pusch, Markus Gregor, Stefan Heusler

{"title":"Low-cost ODMR experiments with nitrogen-vacancy centers in diamonds: a didactical approach to theory and experiment","authors":"Nils Haverkamp, Alexander Pusch, Markus Gregor, Stefan Heusler","doi":"10.1140/epjqt/s40507-025-00326-5","DOIUrl":"10.1140/epjqt/s40507-025-00326-5","url":null,"abstract":"<div><p>In recent years, nitrogen-vacancy centers in diamond have attracted much interest as tools for magnetic field sensing and imaging. Parallel to this progress in science, also in science education, huge advancements are seen, which might even be called an educational quantum revolution, which just has started to emerge.</p><p>In this article, we present an experimental setup for optically detectable magnetic resonance (ODMR) in micro-diamonds with nitrogen-vacancy centers (NV centers) which extends the recent work presented in Stegemann et al. (Eur J Phys. 44(3):035402, 2023) in view of better accessibility both from a technical perspective and from an didactical perspective. We improved the mechanical setup, and in particular the output of the measured values, which is now carried out by a microcontroller and is directly accessible to digital devices instead of the need of an oscilloscope. In this way, we increase the accessibility of the experimental setup for learners. Concerning modeling of the theoretical foundations, we discuss the importance of symmetries of the wave function for understanding quantum physics and introduce visualizations for the spin and orbit part of the wave function. Furthermore, we present first empirical data (<span>(N = 53)</span>), indicating possible paths for successful dissemination of the experiments to educators.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00326-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

INTENTAS - an entanglement-enhanced atomic sensor for microgravity INTENTAS——用于微重力的纠缠增强原子传感器

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-02-21 DOI: 10.1140/epjqt/s40507-025-00330-9

O. Anton, I. Bröckel, D. Derr, A. Fieguth, M. Franzke, M. Gärtner, E. Giese, J. S. Haase, J. Hamann, A. Heidt, S. Kanthak, C. Klempt, J. Kruse, M. Krutzik, S. Kubitza, C. Lotz, K. Müller, J. Pahl, E. M. Rasel, M. Schiemangk, W. P. Schleich, S. Schwertfeger, A. Wicht, L. Wörner

{"title":"INTENTAS - an entanglement-enhanced atomic sensor for microgravity","authors":"O. Anton, I. Bröckel, D. Derr, A. Fieguth, M. Franzke, M. Gärtner, E. Giese, J. S. Haase, J. Hamann, A. Heidt, S. Kanthak, C. Klempt, J. Kruse, M. Krutzik, S. Kubitza, C. Lotz, K. Müller, J. Pahl, E. M. Rasel, M. Schiemangk, W. P. Schleich, S. Schwertfeger, A. Wicht, L. Wörner","doi":"10.1140/epjqt/s40507-025-00330-9","DOIUrl":"10.1140/epjqt/s40507-025-00330-9","url":null,"abstract":"<div><p>The INTENTAS project aims to develop an atomic sensor utilizing entangled Bose-Einstein condensates (BECs) in a microgravity environment. This key achievement is necessary to advance the capability for measurements that benefit from both entanglement-enhanced sensitivities and extended interrogation times. The project addresses significant challenges related to size, weight, and power management (SWaP) specific to the experimental platform at the Einstein-Elevator in Hannover. The design ensures a low-noise environment essential for the creation and detection of entanglement. Additionally, the apparatus features an innovative approach to the all-optical creation of BECs, providing a flexible system for various configurations and meeting the requirements for rapid turnaround times. Successful demonstration of this technology in the Einstein-Elevator will pave the way for a future deployment in space, where its potential applications will unlock high-precision quantum sensing.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00330-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integration of germanium-vacancy single photon emitters arrays in diamond nanopillars 锗-空位单光子发射阵列在金刚石纳米柱中的集成

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-02-18 DOI: 10.1140/epjqt/s40507-025-00329-2

Elisa Redolfi, Vanna Pugliese, Elia Scattolo, Alessandro Cian, Elena Missale, Felipe Favaro de Oliveira, Gediminas Seniutinas, Sviatoslav Ditalia Tchernij, Rossana Dell’Anna, Paolo Traina, Paolo Olivero, Damiano Giubertoni, Jacopo Forneris

{"title":"Integration of germanium-vacancy single photon emitters arrays in diamond nanopillars","authors":"Elisa Redolfi, Vanna Pugliese, Elia Scattolo, Alessandro Cian, Elena Missale, Felipe Favaro de Oliveira, Gediminas Seniutinas, Sviatoslav Ditalia Tchernij, Rossana Dell’Anna, Paolo Traina, Paolo Olivero, Damiano Giubertoni, Jacopo Forneris","doi":"10.1140/epjqt/s40507-025-00329-2","DOIUrl":"10.1140/epjqt/s40507-025-00329-2","url":null,"abstract":"<div><p>The nanoscale fabrication of <i>μ</i>m-spaced single-photon emitter arrays is crucial for the development of integrated photonic chips. We report on the fabrication and systematic characterization of germanium-vacancy (GeV) color centers arrays in diamond obtained upon ion implantation at the nanoscale. Ge<sup>2+</sup> ion implantations at 35 keV and 70 keV energies were carried out using a focused ion beam (FIB) equipped with a liquid metal alloy ion source. The arrays of emitters are subsequently aligned to ø300 nm nanopillar waveguiding structures, fabricated using a combination of electron-beam lithography and plasma etching. The photon collection efficiency and photoluminescence (PL) signal-to-background ratio increased by a factor 8 with respect to the unstructured sample. The photophysical properties of the GeV emitters fabricated by this approach were unaltered with respect to those found in unprocessed diamond. The efficiency of the overall manufacturing process to fabricate individual GeV centers was assessed. Up to 33% of the fabricated nanopillars, depending on ion implantation parameters, were found to contain single emitters.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00329-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pulse shape optimization against Doppler shifts and delays in optical quantum communication 针对光量子通信中多普勒频移和延迟的脉冲形状优化

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-02-14 DOI: 10.1140/epjqt/s40507-025-00321-w

Emanuel Schlake, Roy Barzel, Dennis Rätzel, Claus Lämmerzahl

引用次数: 0

QCCP: a taskflow programming model for emerging computing scenario QCCP：用于新兴计算场景的任务流编程模型

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-02-13 DOI: 10.1140/epjqt/s40507-025-00318-5

Qiming Du, Jinchen Xu, Yu Zhu, Hang Lian, Qibing Xiong, Danyang Zheng, Yi Liu, Zheng Tu, Zheng Shan

{"title":"QCCP: a taskflow programming model for emerging computing scenario","authors":"Qiming Du, Jinchen Xu, Yu Zhu, Hang Lian, Qibing Xiong, Danyang Zheng, Yi Liu, Zheng Tu, Zheng Shan","doi":"10.1140/epjqt/s40507-025-00318-5","DOIUrl":"10.1140/epjqt/s40507-025-00318-5","url":null,"abstract":"<div><p>As the demand for computing power continues to rise, it is difficult for a single type of computing device or architecture to satisfy the current situation. Diversity and heterogeneity are becoming more and more popular. Seamlessly integrating the realms of high performance computing and quantum computing, and harnessing their collective potential, has emerged as a consensus approach to effectively address the pressing need for increased computing power. In the emerging computing scenario, various different types of computing devices have super-heterogeneous characteristics, and there are significant differences in computational principles, programming models, parallelism, etc. Effectively harnessing these disparate resources and achieving a unified programming paradigm have become urgent imperatives. To address the above problems, this paper introduces QCCP, a taskflow programming model that enables efficient collaborative computing between classical computers and quantum computers. QCCP establishes a unified programming abstraction, shields the super-heterogeneous characteristics of the underlying network and hardware, and supports flexible scheduling for different computational backends. The experimental results indicate that QCCP can support the processing of hybrid classical-quantum applications with diverse program structures. In particular, QCCP reveals its immense potential and superiority in tackling real-world challenges, specifically in the realm of quantum circuit cutting and reconstruction.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00318-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating the use of multiple representations in university courses on quantum technologies 调查在大学量子技术课程中使用多重表征的情况

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-02-13 DOI: 10.1140/epjqt/s40507-025-00327-4

Eva Rexigel, Jonas Bley, Alda Arias, Linda Qerimi, Stefan Küchemann, Jochen Kuhn, Artur Widera

{"title":"Investigating the use of multiple representations in university courses on quantum technologies","authors":"Eva Rexigel, Jonas Bley, Alda Arias, Linda Qerimi, Stefan Küchemann, Jochen Kuhn, Artur Widera","doi":"10.1140/epjqt/s40507-025-00327-4","DOIUrl":"10.1140/epjqt/s40507-025-00327-4","url":null,"abstract":"<div><p>The field of Quantum Information Science and Technology (QIST) education presents unique challenges for both students and educators, such as the necessity of understanding abstract properties of quantum systems. To provide a more intuitive understanding of quantum systems, a multitude of qubit representations have been developed in recent years. Given the diversity of the field, a specific representation may be more suitable in one content area of than in another. Consequently, the choice of representation may vary considerably depending on the course orientation. However, no exhaustive analysis has been conducted into the differences between the representation of single- and multi-qubit systems in higher education QIST courses. Furthermore, the factors which influence the selection of a suitable representation remain open. To close this gap, we conducted an online survey with 25 educators at different German and Austrian universities on their use of representations in QIST-related courses. The results confirm the pivotal role of mathematical formalism in QIST education regardless of the specific course characteristics but also reveal an untapped potential for enhancing student learning through the intentional and comprehensive use of multiple external representations (MERs), especially in the case of multi-qubit systems. The findings are discussed within the context of the field of QIST and current insights into learning with MERs.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00327-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tight upper bound of the maximal quantum violation of Gisin’s elegant Bell inequality and its application in randomness certification Gisin优雅贝尔不等式最大量子违反的紧上界及其在随机性证明中的应用

IF 5.8 2区物理与天体物理

EPJ Quantum Technology Pub Date : 2025-02-11 DOI: 10.1140/epjqt/s40507-025-00325-6

Dan-Dan Hu, Meng-Yan Li, Fen-Zhuo Guo, Yu-Kun Wang, Hai-Feng Dong, Fei Gao

{"title":"Tight upper bound of the maximal quantum violation of Gisin’s elegant Bell inequality and its application in randomness certification","authors":"Dan-Dan Hu, Meng-Yan Li, Fen-Zhuo Guo, Yu-Kun Wang, Hai-Feng Dong, Fei Gao","doi":"10.1140/epjqt/s40507-025-00325-6","DOIUrl":"10.1140/epjqt/s40507-025-00325-6","url":null,"abstract":"<div><p>The violation of a Bell inequality implies the existence of nonlocality, making device-independent randomness certification possible. This paper derives a tight upper bound for the maximal quantum violation of Gisin’s elegant Bell inequality (EBI) for arbitrary two-qubit states, along with the constraints required to achieve this bound. This method provides the necessary and sufficient conditions for violating the EBI for several quantum states, including pure two-qubit states and the Werner states. The lower bound of certifiable global randomness is analyzed based on the tight upper bound of the EBI for pure two-qubit states, with a comparison to the Clauser-Horne-Shimony-Holt (CHSH) inequality. The relationship between the noise level and the lower bound of certifiable global randomness with respect to the Werner states is also explored, and the comparisons with both the CHSH inequality and the chained inequality are given. The results indicate that when the state approaches a maximally entangled state within specific quantified ranges, the EBI demonstrates advantages over both the CHSH inequality and the chained inequality, providing theoretical guidance for experimental device-independent quantum random number generation.</p></div>","PeriodicalId":547,"journal":{"name":"EPJ Quantum Technology","volume":"12 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://epjquantumtechnology.springeropen.com/counter/pdf/10.1140/epjqt/s40507-025-00325-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0