量子信息科学期刊(英文)最新文献_第2页

On Security of Quantum Cryptography by Probabilistic Analysis 基于概率分析的量子密码安全性研究

量子信息科学期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/jqis.2022.124008

Jianzhong Zhao

引用次数: 0

A Quantum Mechanical Proof of Insecurity of the Theoretical QKD Protocols 理论QKD协议不安全性的量子力学证明

量子信息科学期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/jqis.2022.123006

Jianzhong Zhao

{"title":"A Quantum Mechanical Proof of Insecurity of the Theoretical QKD Protocols","authors":"Jianzhong Zhao","doi":"10.4236/jqis.2022.123006","DOIUrl":"https://doi.org/10.4236/jqis.2022.123006","url":null,"abstract":"Cryptography is crucial to communication security. In 1984, a well-known QKD (quantum key distribution) protocol, BB84, was published by Bennett and Brassard. The BB84 Protocol was followed by the QKD protocols published by Ekert (1991) (E91) and Bennett (1992) (B92). Some authors proved security of the theoretical QKD protocols in different theoretical frameworks by defining security of QKD protocols differently. My argument is that the previous proofs of security are neither unique nor exhaustive for each theoretical QKD protocol, which means that proof of security of the theoretical QKD protocols has not been completed or achieved. The non-uniqueness and the non-exhaustiveness of the proofs will lead to more proofs. However, a coming “proof” of security of the theoretical QKD protocols is possible to be a disproof. The research by quantum mechanics in this paper disproves security of the theoretical QKD protocols, by establishing the theoretical framework of quantum mechanical proof, defining security of QKD protocols, establishing the quantum state of the final key of the theoretical protocols from their information leakages, and applying Grover’s fast quantum mechanical algorithm for database search to the quantum state of the final key to result in the Insecurity Theorem. This result is opposite to those of the previous proofs where the theoretical QKD protocols were secure. It is impossible for Alice and Bob to protect their communications from information leakage by stopping or canceling the protocols. The theoretical QKD keys are conventional and basically insecure. Disproof of security of the theoretical QKD protocols is logical.","PeriodicalId":58996,"journal":{"name":"量子信息科学期刊(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70421696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Coherent States and Uncertainty Product of the Harmonic Oscillator with Position-Dependent Mass 具有位置相关质量的谐振子的相干态和不确定积

量子信息科学期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/jqis.2022.121002

Chadia Qotni, H. Laribou

引用次数: 0

The Superconductivity in Fe-Based Family of Superconductors and Its Electronic Structure Analysis in Presence of Dopants Rh and Pd Rh和Pd掺杂下铁基超导体的超导性及其电子结构分析

量子信息科学期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/jqis.2022.124010

Ronald Columbié-Leyva, Alberto López-Vivas, U. Miranda, I. Kaplan

引用次数: 0

Continuous Variable Quantum MNIST Classifiers
—Classical-Quantum Hybrid Quantum Neural Networks 连续变量量子MNIST分类器-经典-量子混合量子神经网络

量子信息科学期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/jqis.2022.122005

Sophie Choe, M. Perkowski

引用次数: 2

The Quantum Handshake: An Electric Charge/Transactional Interpretation of the Single Electron Double-Slit Experiment 量子握手：单电子双狭缝实验的电荷/交易解释

量子信息科学期刊(英文) Pub Date : 2021-06-17 DOI: 10.4236/jqis.2021.112006

Eric Bond

引用次数: 0

Quantum Mechanical Calculations of High-Tc Fe-Superconductors 高Tc-Fe超导体的量子力学计算

量子信息科学期刊(英文) Pub Date : 2021-06-17 DOI: 10.4236/jqis.2021.112007

Ronald Columbié-Leyva, U. Miranda, Alberto López-Vivas, J. Soullard, I. Kaplan

{"title":"Quantum Mechanical Calculations of High-Tc Fe-Superconductors","authors":"Ronald Columbié-Leyva, U. Miranda, Alberto López-Vivas, J. Soullard, I. Kaplan","doi":"10.4236/jqis.2021.112007","DOIUrl":"https://doi.org/10.4236/jqis.2021.112007","url":null,"abstract":"In introduction we presented a short historical survey of the discovery of superconductivity (SC) up to the Fe-based materials that are not superconducting in a pure state. For this type of material, the transition to SC state occurs in presence of different dopants. Recently in the Fe-based materials at high pressures, the SC was obtained at room critical temperature. In this paper, we present the results of calculations of the isolated cluster representing infinitum crystal with Rh and Pd as dopants. All calculations are performed with the suite of programs Gaussian 16. The obtained results are compared with our previous results obtained for embedded cluster using Gaussian 09. In the case of embedded cluster our methodology of the Embedded Cluster Method at the MP2 electron correlation level was applied. In the NBO population analysis two main features are revealed: the independence of charge density transfer from the spin density transfer and, the presence of orbitals with electron density but without spin density. This is similar to the Anderson’s spinless holon and confirms our conclusions in previous publications that the possible mechanism for superconductivity can be the RVB mechanism proposed by Anderson for high Tc superconductivity in cuprates.","PeriodicalId":58996,"journal":{"name":"量子信息科学期刊(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43971915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A Sufficient Clarification of “Super-Quantum Correlations: A Necessary Clarification” by Pierre Uzan 对皮埃尔·乌赞“超量子关联”的充分澄清:一个必要的澄清

量子信息科学期刊(英文) Pub Date : 2021-06-17 DOI: 10.4236/jqis.2021.112005

N. Courtemanche, C. Crépeau

引用次数: 1

Quantum Fisher Information of Two-Level Atomic System under the Influence of Thermal Field, Intrinsic Decoherence, Stark Effect and Kerr-Like Medium 热场、本征退相干、斯塔克效应和类克尔介质影响下二能级原子系统的量子费雪信息

量子信息科学期刊(英文) Pub Date : 2021-02-04 DOI: 10.4236/JQIS.2021.111003

S. J. Anwar, M. Ramzan, M. Usman, M. K. Khan

{"title":"Quantum Fisher Information of Two-Level Atomic System under the Influence of Thermal Field, Intrinsic Decoherence, Stark Effect and Kerr-Like Medium","authors":"S. J. Anwar, M. Ramzan, M. Usman, M. K. Khan","doi":"10.4236/JQIS.2021.111003","DOIUrl":"https://doi.org/10.4236/JQIS.2021.111003","url":null,"abstract":"In this paper, we have proposed the numerical calculations to study the quantum entanglement (QE) of moving two-level atom interacting with a coherent and the thermal field influenced by intrinsic decoherence (ID), Kerr medium (non-linear) and the Stark effect. The wave function of the complete system interacting with a coherent and the thermal field is calculated numerically affected by ID, Kerr (non-linear) and Stark effects. It has been seen that the Stark, Kerr, ID and the thermal environment have a significant effect during the time evolution of the quantum system. Quantum Fisher information (QFI) and QE decrease as the value of the ID parameter is increased in the thermal field without the atomic movement. It is seen that QFI and von Neumann entropy (VNE) show an opposite and periodic response in the presence of atomic motion. The non-linear Kerr medium has a more prominent and significant effect on the QE as the value of the Kerr parameter is decreased. At smaller values of the non-linear Kerr parameter, the VNE increases, however, QFI decreases, so QFI and VNE have a monotonic connection with one another. As the value of the Kerr parameter is increased, the effect of non-linear Kerr doesn’t stay critical on both QFI and QE. However, a periodic response of QE is seen because of the atomic movement which becomes modest under natural impacts. Moreover, it has been seen that QFI and QE rot soon at the smaller values of the Stark parameter. However, as the value of the Stark parameter is increased, the QFI and QE show periodic response even when the atomic movement is absent.","PeriodicalId":58996,"journal":{"name":"量子信息科学期刊(英文)","volume":"11 1","pages":"24-41"},"PeriodicalIF":0.0,"publicationDate":"2021-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44770597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Squeezing Effects on the Estimation Precision of Cut off Frequency 压缩对截止频率估计精度的影响

量子信息科学期刊(英文) Pub Date : 2021-02-04 DOI: 10.4236/JQIS.2021.111002

A. Ullah, Khalid Khan

引用次数: 0