Advanced quantum technologies最新文献

{"title":"Imperfect Measurement Devices Impact the Security of Tomography-Based Source-Independent Quantum Random Number Generator","authors":"Yuanhao Li,&nbsp;Yangyang Fei,&nbsp;Weilong Wang,&nbsp;Xiangdong Meng,&nbsp;Hong Wang,&nbsp;Qianheng Duan,&nbsp;Yu Han,&nbsp;Zhi Ma","doi":"10.1002/qute.202400334","DOIUrl":"10.1002/qute.202400334","url":null,"abstract":"<p>Source-independent quantum random number generators (SI-QRNGs) can generate secure random numbers with untrusted and uncharacterized sources. Recently, a tomography-based SI-QRNG protocol has garnered significant attention for its higher randomness generation rate[Phys. Rev. A 99, 022328 (2019)], achieved through measurements utilizing three mutually unbiased bases. However, imperfect and inadequately characterized measurement devices would impact the security and performance of this protocol. In this work, considering the imperfect basis modulation, afterpulse effect and detection efficiency mismatch, it is demonstrated that the imperfect measurement devices would reduce the extractable randomness and lead to the incorrect estimation of the conditional min-entropy. Additionally, the influences of the finite-size effect and the performances of the protocol based on different parameter estimation methods are investigated and compared. To guarantee the security of generated random numbers, accurate conditional min-entropy estimation methods that are compatible with imperfect factors are also developed. The work emphasizes the significance of considering the imperfections in measurement devices and establishing tighter bounds for parameter estimation, especially in high-speed systems, thereby enhancing the robustness and performance of the protocol.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218906","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}

{"title":"Investigating Entropic Dynamics of Multiqubit Cavity QED System","authors":"Hui-hui Miao","doi":"10.1002/qute.202400246","DOIUrl":"10.1002/qute.202400246","url":null,"abstract":"<p>Entropic dynamics of a multiqubit cavity quantum electrodynamics system is simulated and various aspects of entropy are explored. In the modified version of the Tavis–Cummings–Hubbard model, atoms are held in optical cavities through optical tweezers and can jump between different cavities through the tunneling effect. The interaction of atom with the cavity results in different electronic transitions and the creation and annihilation of corresponding types of photon. Electron spin and the Pauli exclusion principle are considered. Formation and break of covalent bond and creation and annihilation of phonon are also introduced into the model. The system is bipartite. The effect of all kinds of interactions on entropy is studied. And the von Neumann entropy of different subsystems is compared. The results show that the entropic dynamics can be controlled by selectively choosing system parameters, and the entropy values of different subsystems satisfy certain inequality relationships.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218905","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}

{"title":"A Novel Authenticated Quantum Anonymous Secret Sharing for Classical and Quantum Information","authors":"Qingle Wang,&nbsp;Yixi Xu,&nbsp;Guodong Li,&nbsp;Yunguang Han,&nbsp;Yuqian Zhou,&nbsp;Xin Li,&nbsp;Long Cheng","doi":"10.1002/qute.202400295","DOIUrl":"10.1002/qute.202400295","url":null,"abstract":"<p>Anonymous secret sharing (ASS) is an essential cryptographic concept that facilitates the sharing and reconstruction of secret information while safeguarding the identity of the involved secret receivers, which has broad applications in key management, data backup, and distributed systems. In this study, a novel authenticated quantum anonymous secret sharing (QASS) protocol that emphasizes information privacy and identity anonymity protection is proposed. Employing <span></span><math>\u0000 <semantics>\u0000 <mi>d</mi>\u0000 <annotation>$d$</annotation>\u0000 </semantics></math>-level multipartite GHZ states as a quantum resource, one-sided anonymous entanglement (AE) is innovatively established between the dealer and anonymous receivers, enabling the dealer to distribute a random share of secret information. Additionally, by establishing a one-sided AE between anonymous receivers and restorer, the restorer can securely collect and reconstruct the secret information using quantum teleportation (QT). Rigorous security analysis demonstrates that protocol can resist attacks from active adversaries and potentially dishonest users. Quantum experiments on IBM Qiskit validate the correctness and feasibility of the proposed QASS protocol. This work contributes to the advancement of quantum anonymous communication, addressing the requirements for information privacy and identity anonymity in practical application environments.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227428","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}

{"title":"Additively Manufactured Ceramics for Compact Quantum Technologies","authors":"Marc Christ,&nbsp;Conrad Zimmermann,&nbsp;Sascha Neinert,&nbsp;Bastian Leykauf,&nbsp;Klaus Döringshoff,&nbsp;Markus Krutzik","doi":"10.1002/qute.202400076","DOIUrl":"10.1002/qute.202400076","url":null,"abstract":"<p>Quantum technologies are advancing from fundamental research in specialized laboratories to practical applications in the field, driving the demand for robust, scalable, and reproducible system integration techniques. Ceramic components can be pivotal thanks to high stiffness, low thermal expansion, and excellent dimensional stability under thermal stress. Lithography-based additive manufacturing of technical ceramics is explored, especially for miniaturized physics packages and electro-optical systems. This approach enables functional systems with precisely manufactured, intricate structures, and high mechanical stability while minimizing size and weight. It facilitates rapid prototyping, simplifies fabrication and leads to highly integrated, reliable devices. As an electrical insulator with low outgassing and high temperature stability, printed technical ceramics such as <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>Al</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 <msub>\u0000 <mi>O</mi>\u0000 <mn>3</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>${rm Al}_2{rm O}_3$</annotation>\u0000 </semantics></math> and AlN bridge a technology gap in quantum technology and offer advantages over other printable materials. This potential is demonstrated with CerAMRef, a micro-integrated rubidium D2 line optical frequency reference on a printed <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>Al</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 <mi>O</mi>\u0000 <msub>\u0000 <mrow></mrow>\u0000 <mn>3</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>${rm Al}_2{rm O}{_3}$</annotation>\u0000 </semantics></math> micro-optical bench and housing. The frequency instability of the reference is comparable to laboratory setups while the volume of the integrated spectroscopy setup is only <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>6</mn>\u0000 <mspace></mspace>\u0000 <mi>m</mi>\u0000 <mi>L</mi>\u0000 </mrow>\u0000 <annotation>$6 ,mathrm{m}mathrm{L}$</annotation>\u0000 </semantics></math>. Potential for future applications is identified in compact atomic magnetometers, miniaturized optical atom traps, and vacuum system integration.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202400076","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218911","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":"Unconventional Photon Blockade in a Hybrid Optomechanical System with an Embedded Spin-Triplet","authors":"Yao Dong,&nbsp;Jing-jing Wang,&nbsp;Guo-Feng Zhang","doi":"10.1002/qute.202400232","DOIUrl":"10.1002/qute.202400232","url":null,"abstract":"<p>This research investigates the unconventional photon blockade in a hybrid optomechanical system with an embedded spin-triplet state. The self-homodyning interference between squeezed quantum fluctuations produced by the emitter and the coherent fraction from the driving laser results in two-photon suppression. Analytical solutions of the correlator equation and numerical simulations of the master equation reveal that modulated mechanical dissipation plays a crucial role in achieving strong single-photon blockade. In contrast to conventional cavity optomechanical systems, a second-order correlation function of <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mi>g</mi>\u0000 <mrow>\u0000 <mo>(</mo>\u0000 <mn>2</mn>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 </msup>\u0000 <mrow>\u0000 <mo>(</mo>\u0000 <mn>0</mn>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <mo>≃</mo>\u0000 <mn>0</mn>\u0000 </mrow>\u0000 <annotation>$g^{(2)}(0)simeq 0$</annotation>\u0000 </semantics></math> can be achieved with weak single-photon optomechanical coupling. By combining unconventional and conventional antibunching, the hybrid system achieves the convergence of maximal photon population, two-photon interference, and suppression of higher-order correlations. Additionally, the influence of the thermal noise on photon blockade is investigated, demonstrating greater robustness of the second-order correlation under weaker phonon-spin coupling.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227429","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}

{"title":"Selective Temperature Sensing in Nanodiamonds Using Dressed States","authors":"Nathaniel M. Beaver,&nbsp;Paul Stevenson","doi":"10.1002/qute.202400271","DOIUrl":"10.1002/qute.202400271","url":null,"abstract":"<p>Temperature sensing at the nanoscale is a significant experimental challenge. Here, an approach using dressed states is reported to make a leading quantum sensor – the nitrogen-vacancy (NV) center in diamond – selectively sensitive to temperature, even in the presence of normally confounding magnetic fields. Using an experimentally straightforward approach, the magnetic sensitivity of the NV center is suppressed by a factor of seven, while retaining full temperature sensitivity and narrowing the NV center linewidth. These results demonstrate the power of engineering the sensor Hamiltonian using external control fields to enable sensing with improved specificity to target signals.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202400271","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218912","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":"Purity-Assisted Zero-Noise Extrapolation for Quantum Error Mitigation","authors":"Tian-Ren Jin,&nbsp;Yun-Hao Shi,&nbsp;Zheng-An Wang,&nbsp;Tian-Ming Li,&nbsp;Kai Xu,&nbsp;Heng Fan","doi":"10.1002/qute.202400150","DOIUrl":"10.1002/qute.202400150","url":null,"abstract":"<p>Quantum error mitigation aims to reduce errors in quantum systems and improve accuracy. Zero-noise extrapolation (ZNE) is a commonly used method, where noise is amplified, and the target expectation is extrapolated to a noise-free point. However, ZNE relies on assumptions about error rates based on the error model. In this study, a purity-assisted zero-noise extrapolation (pZNE) method is utilized to address limitations in error rate assumptions and enhance the extrapolation process. The pZNE is based on the Pauli diagonal error model implemented using the Pauli twirling technique. Although this method does not significantly reduce the bias of routine ZNE, it extends its effectiveness to a wider range of error rates where routine ZNE may face limitations. In addition, the practicality of the pZNE method is verified through numerical simulations and experiments on the online quantum computation platform, <i>Quafu</i>. Comparisons with routine ZNE and virtual distillation methods show that biases in extrapolation methods increase with error rates and may become divergent at high error rates. The bias of pZNE is slightly lower than routine ZNE, while its error rate threshold surpasses that of routine ZNE. Furthermore, for full density matrix information, the pZNE method is more efficient than the routine ZNE.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218909","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}

{"title":"Efficient Arbitrated Quantum Digital Signature with Multi-Receiver Verification","authors":"Siyu Xiong,&nbsp;Bangying Tang,&nbsp;Hui Han,&nbsp;Jinquan Huang,&nbsp;Mingqiang Bai,&nbsp;Fangzhao Li,&nbsp;Wanrong Yu,&nbsp;Zhiwen Mo,&nbsp;Bo Liu","doi":"10.1002/qute.202400110","DOIUrl":"10.1002/qute.202400110","url":null,"abstract":"<p>Quantum digital signature is used to authenticate the identity of the signer with information theoretical security while providing non-forgery and non-repudiation services. In traditional multi-receiver quantum digital signature schemes without an arbitrator, the transferability of one-to-one signature is always required to achieve unforgeability, with complicated implementation and heavy key consumption. In this article, an arbitrated quantum digital signature scheme is proposed, in which the signature can be verified by multiple receivers simultaneously, and meanwhile, the transferability of the signature is still kept. This scheme can be simplified performed to various quantum secure networks, due to the proposed efficient signature calculation procedure with low secure key consumption and low computation complexity, by employing one-time universal hashing algorithm and a one-time pad encryption scheme. The evaluation results show that this scheme uses at least two orders of magnitude less key than existing signature schemes with transferability when signing files of the same length with the same number of receivers and security parameter settings.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 11","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218913","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}

{"title":"Purity and Construction of Arbitrary Dimensional \u0000 \u0000 k\u0000 $k$\u0000 -Uniform Mixed States","authors":"Xiao Zhang,&nbsp;Shanqi Pang,&nbsp;Shao-Ming Fei,&nbsp;Zhu-Jun Zheng","doi":"10.1002/qute.202400245","DOIUrl":"10.1002/qute.202400245","url":null,"abstract":"<p><i>k</i>-uniform mixed states are a significant class of states characterized by all <i>k</i>-party reduced states being maximally mixed.Novel methodologies are constructed for constructing <i>k</i>-uniform mixed states with the highest possible purity. By using the orthogonal partition of orthogonal arrays, a series of new <i>k</i>-uniform mixed states is derived. Consequently, an infinite number of higher-dimensional <i>k</i>-uniform mixed states, including those with highest purity, can be generated.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218914","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}

{"title":"Numerical Investigation of a Coupled Micropillar - Waveguide System for Integrated Quantum Photonic Circuits","authors":"Léo J. Roche,&nbsp;Fridtjof Betz,&nbsp;Yuhui Yang,&nbsp;Imad Limame,&nbsp;Ching-Wen Shih,&nbsp;Sven Burger,&nbsp;Stephan Reitzenstein","doi":"10.1002/qute.202400195","DOIUrl":"10.1002/qute.202400195","url":null,"abstract":"<p>The on-chip resonant excitation of single quantum dots (QDs) via integrated microlasers represents an effective and scalable method for integrated quantum photonics applications based on on-demand single-photon emitters. In this study, the design and numerical optimization of the evanescent coupling between whispering gallery modes (WGMs) of a micropillar resonator and a nearby single-mode ridge waveguide in the Al(Ga)As/GaAs material system are presented. In this study, such systems are examined within a wavelength range of 930 nm, which is suitable for resonant excitation of typical self-assembled InGaAs quantum dots. In particular, the coupling and the transmitted optical power of a WGM resonator to a ridge waveguide are examined for a range of gap spacings, with the objective of optimizing the photon coupling efficiency and Q-factor of the monolithically integrated nanophotonic system. The findings of this study enable to identify the best device parameters for subsequent device fabrication. The findings establish a foundation for the production of highly effective photonic quantum circuits through the use of WGM microlasers integrated into evanescently coupled waveguide systems, including resonantly excited single quantum dots.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202400195","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218916","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}