Frontiers of Physics最新文献

Two-dimensional polarized MoSSe/MoTe2 van der Waals heterostructure: A polarization-tunable optoelectronic material 二维极化MoSSe/MoTe2范德华异质结构:一种偏振可调光电材料

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-09-06 DOI: 10.1007/s11467-023-1330-2

Fahhad Alsubaie, Munirah Muraykhan, Lei Zhang, Dongchen Qi, Ting Liao, Liangzhi Kou, Aijun Du, Cheng Tang

{"title":"Two-dimensional polarized MoSSe/MoTe2 van der Waals heterostructure: A polarization-tunable optoelectronic material","authors":"Fahhad Alsubaie, Munirah Muraykhan, Lei Zhang, Dongchen Qi, Ting Liao, Liangzhi Kou, Aijun Du, Cheng Tang","doi":"10.1007/s11467-023-1330-2","DOIUrl":"10.1007/s11467-023-1330-2","url":null,"abstract":"<div><p>Two-dimensional (2D) heterostructures have shown great potential in advanced photovoltaics due to their restrained carrier recombination, prolonged exciton lifetime and improved light absorption. Herein, a 2D polarized heterostructure is constructed between Janus MoSSe and MoTe<sub>2</sub> monolayers and is systematically investigated via first-principles calculations. Electronically, the valence band and conduction band of the MoSSe–MoTe<sub>2</sub> (MoSeS–MoTe<sub>2</sub>) are contributed by MoTe<sub>2</sub> and MoSSe layers, respectively, and its bandgap is 0.71 (0.03) eV. A built-in electric field pointing from MoTe<sub>2</sub> to MoSSe layers appears at the interface of heterostructures due to the interlayer carrier redistribution. Notably, the band alignment and built-in electric field make it a direct z-scheme heterostructure, benefiting the separation of photogenerated electron-hole pairs. Besides, the electronic structure and interlayer carrier reconstruction can be readily controlled by reversing the electric polarization of the MoSSe layer. Furthermore, the light absorption of the MoSSe/MoTe<sub>2</sub> heterostructure is also improved in comparison with the separated monolayers. Consequently, in this work, a new z-scheme polarized heterostructure with polarization-controllable optoelectronic properties is designed for highly efficient optoelectronics.\u0000</p><figure><div><div><div><picture><source><img></source></picture></div></div></div></figure></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4283590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent review of surface plasmons and plasmonic hot electron effects in metallic nanostructures 金属纳米结构中表面等离子体和等离子体热电子效应的研究进展

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-07-19 DOI: 10.1007/s11467-023-1328-9

Hao Zhang, Mohsin Ijaz, Richard J. Blaikie

引用次数: 1

Dynamical-corrected nonadiabatic geometric quantum computation 动态校正非绝热几何量子计算

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-07-14 DOI: 10.1007/s11467-023-1322-2

Cheng-Yun Ding, Li Chen, Li-Hua Zhang, Zheng-Yuan Xue

{"title":"Dynamical-corrected nonadiabatic geometric quantum computation","authors":"Cheng-Yun Ding, Li Chen, Li-Hua Zhang, Zheng-Yuan Xue","doi":"10.1007/s11467-023-1322-2","DOIUrl":"10.1007/s11467-023-1322-2","url":null,"abstract":"<div><p>Recently, nonadiabatic geometric quantum computation has been received great attentions, due to its fast operation and intrinsic error resilience. However, compared with the corresponding dynamical gates, the robustness of implemented nonadiabatic geometric gates based on the conventional single-loop geometric scheme still has the same order of magnitude due to the requirement of strict multi-segment geometric controls, and the inherent geometric fault-tolerance characteristic is not fully explored. Here, we present an effective geometric scheme combined with a general dynamical-corrected technique, with which the super-robust nonadiabatic geometric quantum gates can be constructed over the conventional single-loop geometric and two-loop composite-pulse geometric strategies, in terms of resisting the systematic error, i.e., <i>σ</i><sub><i>x</i></sub> error. In addition, combined with the decoherence-free subspace (DFS) coding, the resulting geometric gates can also effectively suppress the <i>σ</i><sub><i>z</i></sub> error caused by the collective dephasing. Notably, our protocol is a general one with simple experimental setups, which can be potentially implemented in different quantum systems, such as Rydberg atoms, trapped ions and superconducting qubits. These results indicate that our scheme represents a promising way to explore large-scale fault-tolerant quantum computation.\u0000</p><figure><div><div><div><picture><source><img></source></picture></div></div></div></figure></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"18 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4574725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-photon source with sub-MHz linewidth for cesium-based quantum information processing 用于铯基量子信息处理的亚mhz线宽单光子源

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-07-12 DOI: 10.1007/s11467-023-1317-z

Hai He, Peng-Fei Yang, Peng-Fei Zhang, Gang Li, Tian-Cai Zhang

引用次数: 0

The factorization-assisted topological-amplitude approach and its applications 因子分解辅助拓扑振幅方法及其应用

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-07-12 DOI: 10.1007/s11467-023-1321-3

Qin Qin, Chao Wang, Di Wang, Si-Hong Zhou

{"title":"The factorization-assisted topological-amplitude approach and its applications","authors":"Qin Qin, Chao Wang, Di Wang, Si-Hong Zhou","doi":"10.1007/s11467-023-1321-3","DOIUrl":"10.1007/s11467-023-1321-3","url":null,"abstract":"<div><p>Heavy meson decays provide an important platform for studies of both QCD and electroweak dynamics, which may contain some portals to understanding of nonperturbative QCD and physics beyond the Standard Model. The factorization-assisted topological-amplitude approach was proposed to study two-body non-leptonic <i>D</i> meson decays, where a promising QCD inspired approach from first principles is still missing. It was also applied to <i>B</i> meson decays whose subleading power contributions are difficult to calculate. By factorizing topological amplitudes into short distance Wilson coefficients and long distance hadronic matrix elements either to be calculated or to be parameterized, it provides an effective framework to extract information of nonperturbative dynamics involved. With important flavor <i>SU</i>(3) breaking effects taken into account, the data of the decay branching ratios (and also <i>CP</i> asymmetries in <i>B</i> decays) can be fitted well. The extracted amplitudes were further applied to make predictions for other observables, such as <i>CP</i> asymmetries in <i>D</i> decays, mixing parameters in the <span>({D^0} - {{bar D}^0})</span> system. By this review, we will describe the formulation of the factorization-assisted topological-amplitude approach and summarize its applications in <i>D</i> and <i>B</i> meson decays and highlight some of its achievements.\u0000</p><figure><div><div><div><picture><source><img></source></picture></div></div></div></figure></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"18 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4499990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

On the question of quark confinement in the Abelian U(1) QED gauge interaction 关于Abelian U(1) QED规范相互作用中的夸克约束问题

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-07-12 DOI: 10.1007/s11467-023-1288-0

Cheuk-Yin Wong

{"title":"On the question of quark confinement in the Abelian U(1) QED gauge interaction","authors":"Cheuk-Yin Wong","doi":"10.1007/s11467-023-1288-0","DOIUrl":"10.1007/s11467-023-1288-0","url":null,"abstract":"<div><p>If we approximate light quarks as massless and apply the Schwinger confinement mechanism to light quarks, we will reach the conclusion that a light quark <i>q</i> and its antiquark <span>({bar q})</span> will be confined as a <span>(qbar q)</span> boson in the Abelian <i>U</i>(1) QED gauge interaction in (1+1)D, as in an open string. From the work of Coleman, Jackiw, and Susskind, we can infer further that the Schwinger confinement mechanism persists even for massive quarks in (1+ 1)D. Could such a QED-confined <span>(qbar q)</span> one-dimensional open string in (1 + 1) D be the idealization of a flux tube in the physical world in (3+l)D, similar to the case of QCD-confined <span>(qbar q)</span> open string? If so, the QED-confined <span>(qbar q)</span> bosons may show up as neutral QED mesons in the mass region of many tens of MeV [<i>Phys. Rev. C</i> 81, 064903 (2010) & <i>J. High Energy Phys.</i> 2020(8), 165 (2020)]. Is it ever possible that a quark and an antiquark be produced and interact in QED alone to form a confined QED meson? Is there any experimental evidence for the existence of a QED meson (or QED mesons)? The observations of the anomalous soft photons, the XI7 particle, and the E38 particle suggest that they may bear the experimental evidence for the existence of such QED mesons. Further confirmation and investigations on the XI7 and E38 particles will shed definitive light on the question of quark confinement in QED in (3+1)D. Implications of quark confinement in the QED interaction are discussed.\u0000</p><figure><div><div><div><picture><source><img></source></picture></div></div></div></figure></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"18 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4499958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Realization of highly isolated stable few-spin systems based on alkaline-earth fermions 基于碱土费米子的高孤立稳定少自旋系统的实现

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-07-12 DOI: 10.1007/s11467-023-1314-2

Wen-Wei Wang, Han Zhang, Chang Qiao, Ming-Cheng Liang, Rui Wu, Xibo Zhang

{"title":"Realization of highly isolated stable few-spin systems based on alkaline-earth fermions","authors":"Wen-Wei Wang, Han Zhang, Chang Qiao, Ming-Cheng Liang, Rui Wu, Xibo Zhang","doi":"10.1007/s11467-023-1314-2","DOIUrl":"10.1007/s11467-023-1314-2","url":null,"abstract":"<div><p>Few-level systems consisting of a certain number of spin states have provided the basis of a wide range of cold atom researches. However, more developments are still needed for better preparation of isolated few-spin systems. In this work, we demonstrate a highly nonlinear spin-discriminating (HNSD) method for isolating an arbitrary few-level manifold out of a larger total number of spin ground states in fermionic alkaline-earth atoms. With this method, we realize large and tunable energy shifts for unwanted spin states while inducing negligible shifts for the spin states of interest, which leads to a highly isolated few-spin system under minimal perturbation. Furthermore, the isolated few-spin system exhibits a long lifetime on the hundred-millisecond scale. Using the HNSD method, we demonstrate a characteristic Rabi oscillation between the two states of an isolated two-spin Fermi gas. Our method has wide applicability for realizing long-lived two-spin or high-spin quantum systems based on alkaline-earth fermions.\u0000</p><figure><div><div><div><picture><source><img></source></picture></div></div></div></figure></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"18 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4495383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reconfigurable memristor based on SrTiO3 thin-film for neuromorphic computing 基于SrTiO3薄膜的神经形态计算可重构忆阻器

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-07-11 DOI: 10.1007/s11467-023-1308-0

Xiaobing Yan, Xu Han, Ziliang Fang, Zhen Zhao, Zixuan Zhang, Jiameng Sun, Yiduo Shao, Yinxing Zhang, Lulu Wang, Shiqing Sun, Zhenqiang Guo, Xiaotong Jia, Yupeng Zhang, Zhiyuan Guan, Tuo Shi

{"title":"Reconfigurable memristor based on SrTiO3 thin-film for neuromorphic computing","authors":"Xiaobing Yan, Xu Han, Ziliang Fang, Zhen Zhao, Zixuan Zhang, Jiameng Sun, Yiduo Shao, Yinxing Zhang, Lulu Wang, Shiqing Sun, Zhenqiang Guo, Xiaotong Jia, Yupeng Zhang, Zhiyuan Guan, Tuo Shi","doi":"10.1007/s11467-023-1308-0","DOIUrl":"10.1007/s11467-023-1308-0","url":null,"abstract":"<div><p>Neuromorphic computing aims to achieve artificial intelligence by mimicking the mechanisms of biological neurons and synapses that make up the human brain. However, the possibility of using one reconfigurable memristor as both artificial neuron and synapse still requires intensive research in detail. In this work, Ag/SrTiO<sub>3</sub>(STO)/Pt memristor with low operating voltage is manufactured and reconfigurable as both neuron and synapse for neuromorphic computing chip. By modulating the compliance current, two types of resistance switching, volatile and nonvolatile, can be obtained in amorphous STO thin film. This is attributed to the manipulation of the Ag conductive filament. Furthermore, through regulating electrical pulses and designing bionic circuits, the neuronal functions of leaky integrate and fire, as well as synaptic biomimicry with spike-timing-dependent plasticity and paired-pulse facilitation neural regulation, are successfully realized. This study shows that the reconfigurable devices based on STO thin film are promising for the application of neuromorphic computing systems.\u0000</p><figure><div><div><div><picture><source><img></source></picture></div></div></div></figure></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"18 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4459639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Topological non-Hermitian skin effect 拓扑非厄米集肤效应

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-07-03 DOI: 10.1007/s11467-023-1309-z

Rijia Lin, Tommy Tai, Linhu Li, Ching Hua Lee

引用次数: 38

Quantum simulation of Hofstadter butterfly with synthetic gauge fields on two-dimensional superconducting-qubit lattices 二维超导量子比特晶格上霍夫施塔特蝴蝶合成规范场的量子模拟

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-07-01 DOI: 10.1007/s11467-023-1319-x

Wei Feng, Dexi Shao, Guo-Qiang Zhang, Qi-Ping Su, Jun-Xiang Zhang, Chui-Ping Yang

{"title":"Quantum simulation of Hofstadter butterfly with synthetic gauge fields on two-dimensional superconducting-qubit lattices","authors":"Wei Feng, Dexi Shao, Guo-Qiang Zhang, Qi-Ping Su, Jun-Xiang Zhang, Chui-Ping Yang","doi":"10.1007/s11467-023-1319-x","DOIUrl":"10.1007/s11467-023-1319-x","url":null,"abstract":"<div><p>Motivated by recent realizations of two-dimensional (2D) superconducting-qubit lattices, we propose a protocol to simulate Hofstadter butterfly with synthetic gauge fields in superconducting circuits. Based on the existing 2D superconducting-qubit lattices, we construct a generalized Hofstadter model on zigzag lattices, which has a fractal energy spectrum similar to the original Hofstadter butterfly. By periodically modulating the resonant frequencies of qubits, we engineer a synthetic gauge field to mimic the generalized Hofstadter Hamiltonian. A spectroscopic method is used to demonstrate the Hofstadter butterfly from the time evolutions of experimental observables. We numerically simulate the dynamics of the system with realistic parameters, and the results show a butterfly spectrum clearly. Our proposal provides a promising way to realize the Hofstadter butterfly on the latest 2D superconducting-qubit lattices and will stimulate the quantum simulation of novel properties induced by magnetic fields in superconducting circuits.\u0000</p><figure><div><div><div><picture><source><img></source></picture></div></div></div></figure></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"18 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4031996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0