{"title":"Operation of Single-Spin Qubits: Recent Advances and Prospects (Adv. Phys. Res. 4/2025)","authors":"Zhizhuo Zhang, Jushang Ran, Fei Gao, Chuancheng Jia, Xuefeng Guo","doi":"10.1002/apxr.202570010","DOIUrl":"https://doi.org/10.1002/apxr.202570010","url":null,"abstract":"<p><b>Single-Spin Manipulation of Quantum Systems</b></p><p>Various quantum systems such as color centers, quantum dots, atoms, and molecules have demonstrated their capability for single-spin manipulation, which paves the way for new ideas and infinite possibilities in quantum information science. In review 2400146, Fei Gao, Chuancheng Jia, Xuefeng Guo and co-workers discuss in detail the progress and challenges of single-rotation manipulation and detection in the aforementioned quantum systems, and provide insights for future directions of research.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202570010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Valentin Leeb, Nico Huber, Christian Pfleiderer, Johannes Knolle, Marc A. Wilde
{"title":"A Field Guide to Non-Onsager Quantum Oscillations in Metals (Adv. Phys. Res. 4/2025)","authors":"Valentin Leeb, Nico Huber, Christian Pfleiderer, Johannes Knolle, Marc A. Wilde","doi":"10.1002/apxr.202570008","DOIUrl":"https://doi.org/10.1002/apxr.202570008","url":null,"abstract":"<p><b>Quantum Oscillation Measurement</b></p><p>The circular motion of electrons in a magnetic field can be visualized in a Teltron tube. Electrons in metals behave in a similar way, leading to characteristic oscillations of observables. In review 2400134, Johannes Knolle and co-workers explain how they found new oscillations due to nonlinear couplings between multiple electron orbits. Cover image by Criss Hohmann (MCQST).\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202570008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Stephen H. Foulger, Yuriy Bandera, Igor Luzinov, Travis Wanless
{"title":"Polymeric Memristors as Entropy Sources for Probabilistic Bit Generation","authors":"Stephen H. Foulger, Yuriy Bandera, Igor Luzinov, Travis Wanless","doi":"10.1002/apxr.202400142","DOIUrl":"https://doi.org/10.1002/apxr.202400142","url":null,"abstract":"<p>Probabilistic bits, or p-bits, represent a novel computational element that bridges the gap between deterministic classical bits and quantum bits (qubits) used in quantum computing. Unlike classical bits that maintain a definite state of 0 or 1, a p-bit fluctuates between these states in a controlled, stochastic manner. This probabilistic behavior allows for the representation and processing of information in a form that leverages inherent randomness. In this study, a unique approach is presented to generating p-bits using a hybrid conjugated polymer, poly-4-((6-(4H-dithieno[3,2-b:2',3'-d]pyrrol-4-yl)hexyl)oxy)-N,N-diphenylaniline (pTPADTP), as a memristive material. The polymer's conjugated backbone, combined with pendant triphenylamine groups, enables the creation of p-bits through random resistance switching. The stochasticity of this polymeric memristor makes it particularly suited for p-bit applications in stochastic optimization, probabilistic algorithms, and artificial neural networks. The charge transport in the polymer is facilitated by two synergistic percolation mechanisms: one occurring along the polymer backbone and the other through the pendant triphenylamine groups. The study of p-bits generated from pTPADTP opens new avenues for advancing both the theory and practice of computation, where uncertainty and randomness are harnessed as valuable computational resources.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400142","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xiaotian Wang, Tingting Sun, Chengwu Xie, Hongkuan Yuan, Yang Tie, Zeying Zhang, Gang Zhang
{"title":"Multiple Open and Closed Nodal-Line Phonons in Solids with a 1 Space Group (Adv. Phys. Res. 3/2025)","authors":"Xiaotian Wang, Tingting Sun, Chengwu Xie, Hongkuan Yuan, Yang Tie, Zeying Zhang, Gang Zhang","doi":"10.1002/apxr.202570006","DOIUrl":"https://doi.org/10.1002/apxr.202570006","url":null,"abstract":"<p><b>Investigating the Difference Between Open and Closed Nodal-Line Phonons</b></p><p>Inspired by the “Chinese Knot,” the cover image expresses good wishes, including happiness, prosperity, and love, in the Year of the Snake. The cover's background contains two types of snakes, that is, open and closed snakes whose shapes reflect open and closed nodal lines. Open and closed nodal-line phonons in solids are discussed in more detail in article apxr.202200085 by Y. Tie, Z. Zhang, G. Zhang and co-workers.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202570006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143595057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Valentin Leeb, Nico Huber, Christian Pfleiderer, Johannes Knolle, Marc A. Wilde
{"title":"A Field Guide to Non-Onsager Quantum Oscillations in Metals","authors":"Valentin Leeb, Nico Huber, Christian Pfleiderer, Johannes Knolle, Marc A. Wilde","doi":"10.1002/apxr.202400134","DOIUrl":"https://doi.org/10.1002/apxr.202400134","url":null,"abstract":"<p>Quantum oscillation (QO) measurements constitute a powerful method to measure the Fermi surface (FS) properties of metals. The observation of QOs is usually taken as strong evidence for the existence of extremal cross-sectional areas of the FS according to the famous Onsager relation. Here, mechanisms that generate QO frequencies that defy the Onsager relation are reviewed and material candidates are discussed. These include magnetic breakdown, magnetic interaction, chemical potential oscillations, and Stark quantum interference, most of which lead to signals occurring at combinations of “parent” Onsager frequencies. A special emphasis is put on the recently discovered mechanism of quasi-particle lifetime oscillations (QPLOs). This work aims to provide a field guide that allows, on the one hand, to distinguish such non-Onsager QOs from conventional QOs arising from extremal cross sections and, on the other hand, to distinguish the various non-Onsager mechanisms from each other. A practical classification of non-Onsager QOs is given in terms of the prerequisites for their occurrence and their characteristics. It is shown that, in particular, the recently discovered QPLOs may pose significant challenges for the interpretation of QO spectra, as they may occur quite generically as frequency differences in multi-orbit systems, <i>without</i> the necessity of visible “parent” frequencies in the spectrum, owing to a strongly suppressed temperature dephasing of QPLOs. An extensive list of material candidates is presented where QPLOs may represent an alternative explanation for the observation of unexpected QO frequencies.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400134","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Operation of Single-Spin Qubits: Recent Advances and Prospects","authors":"Zhizhuo Zhang, Jushang Ran, Fei Gao, Chuancheng Jia, Xuefeng Guo","doi":"10.1002/apxr.202400146","DOIUrl":"https://doi.org/10.1002/apxr.202400146","url":null,"abstract":"<p>As a foundational technology in quantum information science (QIS), the manipulation and detection of quantum spins enable precise control, opening new avenues for significant advancements. Early research focused on macroscopic ensemble quantum systems, where electron spin resonance is used to coherently address electron spins within different ensembles. However, the low initialization efficiency and readout sensitivity of such systems hinder their further development. Unlocking the full potential of quantum technology, it is essential to achieve single-spin precision. Various quantum systems, including color centers, quantum dots, atoms, and molecules, have been demonstrated the capability for single-spin manipulation. The successful control of spin quantum states in these systems through diverse techniques has paved the way for new ideas and boundless possibilities in QIS. This review provides a comprehensive overview of recent significant advances in the field and explores future development directions, aiming to shed light on the ongoing evolution of QIS.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400146","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yunbo Ou, Xiaoyin Li, Jan Kopaczek, Austin Davis, Gigi Jackson, Mohammed Sayyad, Feng Liu, Seth Ariel Tongay
{"title":"The Hard Ferromagnetism in FePS3 Induced by Non-Magnetic Molecular Intercalation (Adv. Phys. Res. 2/2025)","authors":"Yunbo Ou, Xiaoyin Li, Jan Kopaczek, Austin Davis, Gigi Jackson, Mohammed Sayyad, Feng Liu, Seth Ariel Tongay","doi":"10.1002/apxr.202570003","DOIUrl":"https://doi.org/10.1002/apxr.202570003","url":null,"abstract":"<p><b>Anisotropic ferromagnetism within antiferromagnetic crystals</b></p><p>The cover feature showcases the emergence of hard anisotropic ferromagnetism following the intercalation of nonmagnetic pyridinium ions into antiferromagnetic FePS<sub>3</sub> single crystals. In article number 202400101, Yunbo Ou, Feng Liu, Seth Ariel Tongay, and colleagues report the transition from antiferromagnetism to ferromagnetism in pyridinium-intercalated FePS<sub>3</sub>, thereby highlighting both the energetically stable B-phase and metastable P-phase. These phases exhibit remarkable properties, including giant coercive fields exceeding 7 T and high Curie temperatures (72–87 K). As revealed by X-ray photoelectron spectroscopy and supported by first-principles calculations and atomistic spin dynamics simulations, electron transfer from the pyridinium ions to FePS<sub>3</sub> plays a key role in driving this transition. This work offers crucial insights into hard magnetism in intercalated van der Waals materials, thus paving the way for advances in 2D magnet-based technologies.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202570003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143380244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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