Frontiers of Physics最新文献_第8页

Cavity-enhanced metrology in an atomic spin-1 Bose–Einstein condensate 原子自旋-1 玻色-爱因斯坦凝聚体中的空腔增强计量学

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-01-02 DOI: 10.1007/s11467-023-1372-5

Renfei Zheng, Jieli Qin, Bing Chen, Xingdong Zhao, Lu Zhou

引用次数: 0

Optimization for epitaxial fabrication of infinite-layer nickelate superconductors 优化无限层镍酸盐超导体的外延制造

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-12-28 DOI: 10.1007/s11467-023-1368-1

Minghui Xu, Yan Zhao, Xiang Ding, Huaqian Leng, Shu Zhang, Jie Gong, Haiyan Xiao, Xiaotao Zu, Huiqian Luo, Ke-Jin Zhou, Bing Huang, Liang Qiao

{"title":"Optimization for epitaxial fabrication of infinite-layer nickelate superconductors","authors":"Minghui Xu, Yan Zhao, Xiang Ding, Huaqian Leng, Shu Zhang, Jie Gong, Haiyan Xiao, Xiaotao Zu, Huiqian Luo, Ke-Jin Zhou, Bing Huang, Liang Qiao","doi":"10.1007/s11467-023-1368-1","DOIUrl":"10.1007/s11467-023-1368-1","url":null,"abstract":"<div><p>The discovery of nickelates superconductor creates exciting opportunities to unconventional superconductivity. However, its synthesis is challenging and only a few groups worldwide can obtain samples with zero-resistance. This problem becomes the major barrier for this field. From plume dynamics perspective, we found the synthesis of superconducting nickelates is a complex process and the challenge is twofold, i.e., how to stabilize an ideal infinite-layer structure Nd<sub>0.8</sub>Sr<sub>0.2</sub>NiO<sub>2</sub>, and then how to make Nd<sub>0.8</sub>Sr<sub>0.2</sub>NiO<sub>2</sub> superconducting? The competition between perovskite Nd<sub>0.8</sub>Sr<sub>0.2</sub>NiO<sub>3</sub> and Ruddlesden–Popper defect phase is crucial for obtaining infinite-layer structure. Due to inequivalent angular distributions of condensate during laser ablation, the laser energy density is critical to obtain phase-pure Nd<sub>0.8</sub>Sr<sub>0.2</sub>NiO<sub>3</sub>. However, for obtaining superconductivity, both laser energy density and substrate temperature are very important. We also demonstrate the superconducting Nd<sub>0.8</sub>Sr<sub>0.2</sub>NiO<sub>2</sub> epitaxial film is very stable in ambient conditions up to 512 days. Our results provide important insights for fabrication of superconducting infinite-layer nickelates towards future device applications.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 3","pages":""},"PeriodicalIF":7.5,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139054445","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

Charge qubits based on ultra-thin topological insulator films 基于超薄拓扑绝缘体薄膜的电荷量子比特

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-12-28 DOI: 10.1007/s11467-023-1364-5

Kexin Zhang, Hugo V. Lepage, Ying Dong, Crispin H. W. Barnes

引用次数: 0

Nonlinear optics of two-dimensional heterostructures 二维异质结构的非线性光学

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-12-19 DOI: 10.1007/s11467-023-1363-6

Xiangkun Zeng, Chenyu Wan, Zhichen Zhao, Di Huang, Zhanshan Wang, Xinbin Cheng, Tao Jiang

引用次数: 0

Efficiently simulating the work distribution of multiple identical bosons with boson sampling 利用玻色子采样高效模拟多个相同玻色子的功分布

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-12-19 DOI: 10.1007/s11467-023-1366-3

Wen-Qiang Liu, Zhang-qi Yin

引用次数: 0

Transmission-reflection decoupling of non-Hermitian photonic doping epsilon-near-zero media 非赫米提光子掺杂ε近零介质的透射-反射解耦

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-12-19 DOI: 10.1007/s11467-023-1362-7

Yongxing Wang (, ), Jizi Lin (, ), Ping Xu (, )

{"title":"Transmission-reflection decoupling of non-Hermitian photonic doping epsilon-near-zero media","authors":"Yongxing Wang \u0000 (, ), Jizi Lin \u0000 (, ), Ping Xu \u0000 (, )","doi":"10.1007/s11467-023-1362-7","DOIUrl":"10.1007/s11467-023-1362-7","url":null,"abstract":"<div><p>We present a novel method to achieve the decoupling between the transmission and reflection waves of non-Hermitian doped epsilon-near-zero (ENZ) media by inserting a dielectric slit into the structure. Our method also allows for independent control over the amplitude and the phase of both the transmission and reflection waves through few dopants, enabling us to achieve various optical effects, such as perfect absorption, high-gain reflection without transmission, reflectionless high-gain transmission and reflectionless total transmission with different phases. By manipulating the permittivity of dopants with extremely low loss or gain, we can realize these effects in the same configuration. We also extend this principle to multi-port doped ENZ structures and design a highly reconfigurable and reflectionless signal distributor and generator that can split, amplify, decay and phase-shift the input signal in any desired way. Our method overcomes limitations of optical manipulation in doped ENZ caused by the interdependent nature of the transmission and reflection, and has potential applications in novel photonic devices.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 3","pages":""},"PeriodicalIF":7.5,"publicationDate":"2023-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138745812","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

Resonant four-photon photoemission from SnSe2(001) SnSe2(001)的共振四光子光发射

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-12-18 DOI: 10.1007/s11467-023-1365-4

Chengxiang Jiao, Kai Huang, Hongli Guo, Xingxia Cui, Qing Yuan, Cancan Lou, Guangqiang Mei, Chunlong Wu, Nan Xu, Limin Cao, Min Feng

{"title":"Resonant four-photon photoemission from SnSe2(001)","authors":"Chengxiang Jiao, Kai Huang, Hongli Guo, Xingxia Cui, Qing Yuan, Cancan Lou, Guangqiang Mei, Chunlong Wu, Nan Xu, Limin Cao, Min Feng","doi":"10.1007/s11467-023-1365-4","DOIUrl":"10.1007/s11467-023-1365-4","url":null,"abstract":"<div><p>High-order nonlinear multiphoton absorption is usually inefficient, but can be enhanced by designing resonant excitations between occupied and unoccupied energy levels. We conducted angle-resolved multi-photon photoemission (mPPE) studies on the SnSe<sub>2</sub>(001) surfaces excited by ultrashort laser pulses. By tuning photon energy and light polarization, we demonstrate the presence of a resonant four-photon photoemission (4PPE) process involving the occupied valence band (VB), the unoccupied second conduction band (CB2) and the unoccupied image-potential state (IPs) of SnSe<sub>2</sub>. In this 4PPE process, VB electrons of SnSe<sub>2</sub> are resonantly excited into CB2 by adsorbing two photons, followed by the adsorption of another photon to populate the <i>n</i> = 1 IPs before being emitted out to the vacuum by adsorbing one more photon. This results in a double-resonant 4PPE process, which exhibits approximately a 40 times enhancement in photoemission yields compared to cases where one of the resonant pathways, CB2 → IPs, is inhibited by involving a virtual state instead of the IPs in the 4PPE. The double-resonant 4PPE process efficiently excite the bulk VB electrons outside the vacuum, like taking advantage of resonant “ladders” through two real empty electronic states of SnSe<sub>2</sub>. Our results highlight the important applications of mPPE in probing the band-structure, particularly the unoccupied states, of recently emerging main group dichalcogenide semiconductors. Furthermore, the discovered resonant mPPE process contributes to the exploration of their promising optoelectronic applications.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 3","pages":""},"PeriodicalIF":7.5,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138713678","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

Localization of q-form fields on a de Sitter brane in chameleon gravity 变色龙引力中德西特(de Sitter)鹤(brane)上 q 形场的定位

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-12-18 DOI: 10.1007/s11467-023-1361-8

Yi Zhong, Tao-Tao Sui

引用次数: 0

Preparation of maximally-entangled states with multiple cat-state qutrits in circuit QED 在电路 QED 中制备具有多猫态 qutrits 的最大纠缠态

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-12-18 DOI: 10.1007/s11467-023-1357-4

Chui-Ping Yang, Jia-Heng Ni, Liang Bin, Yu Zhang, Yang Yu, Qi-Ping Su

{"title":"Preparation of maximally-entangled states with multiple cat-state qutrits in circuit QED","authors":"Chui-Ping Yang, Jia-Heng Ni, Liang Bin, Yu Zhang, Yang Yu, Qi-Ping Su","doi":"10.1007/s11467-023-1357-4","DOIUrl":"10.1007/s11467-023-1357-4","url":null,"abstract":"<div><p>In recent years, cat-state encoding and high-dimensional entanglement have attracted much attention. However, previous works are limited to generation of entangled states of cat-state qubits (two-dimensional entanglement with cat-state encoding), while how to prepare entangled states of cat-state qutrits or qudits (high-dimensional entanglement with cat-state encoding) has not been investigated. We here propose to generate a maximally-entangled state of multiple cat-state qutrits (three-dimensional entanglement by cat-state encoding) in circuit QED. The entangled state is prepared with multiple microwave cavities coupled to a superconducting flux ququart (a four-level quantum system). This proposal operates essentially by the cavity-qutrit dispersive interaction. The circuit hardware resource is minimized because only a coupler ququart is employed. The higher intermediate level of the ququart is occupied only for a short time, thereby decoherence from this level is greatly suppressed during the state preparation. Remarkably, the state preparation time does not depend on the number of the qutrits, thus it does not increase with the number of the qutrits. As an example, our numerical simulations demonstrate that, with the present circuit QED technology, the high-fidelity preparation is feasible for a maximally-entangled state of two cat-state qutrits. Furthermore, we numerically analyze the effect of the inter-cavity crosstalk on the scalability of this proposal. This proposal is universal and can be extended to accomplish the same task with multiple microwave or optical cavities coupled to a natural or artificial four-level atom.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 3","pages":""},"PeriodicalIF":7.5,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138713676","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

The g-factor measurement as an ultimate test for nuclear chirality 将 g 因子测量作为核手性的最终检验方法

IF 7.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2023-12-18 DOI: 10.1007/s11467-023-1359-2

Ernest Grodner, Michał Kowalczyk, Julian Srebrny, Leszek Próchniak, Chrystian Droste, Jan Kownacki, Maciej Kisieliński, Krzysztof Starosta, Takeshi Koike

引用次数: 0