Advanced quantum technologies最新文献

{"title":"Quantum Network Infrastructure","authors":"Lisa Wörner,&nbsp;Kai Bongs,&nbsp;Stefanie Bremer,&nbsp;Philipp Kleinpaß,&nbsp;Florian Moll,&nbsp;Davide Orsucci,&nbsp;Jaspar Meister,&nbsp;Jan-Michael Mol","doi":"10.1002/qute.202300415","DOIUrl":"https://doi.org/10.1002/qute.202300415","url":null,"abstract":"<p>Global quantum state distribution has applications in many areas, one of which is global key distribution for secure communications in an era of the threat of quantum computing. Long-distance quantum key distribution requires a global network of optical relay stations, ground stations, and quantum memories. In this study, why quantum memories should be operated in space as untrusted nodes is presented. In addition to quantum key distribution, quantum memories in space are an enabling technology for distributed quantum sensor systems. The requirements for distributed sensors are outlined and the current technology readiness level of relevant systems is referenced. Finally, the possibility of an emerging quantum internet, enabling the coherent combination of quantum computers around the world, is addressed.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 2","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202300415","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143389373","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":"Issue Information (Adv. Quantum Technol. 12/2024)","authors":"","doi":"10.1002/qute.202470038","DOIUrl":"https://doi.org/10.1002/qute.202470038","url":null,"abstract":"","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202470038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868355","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":"Front Cover: Laser Beam Induced Charge Collection for Defect Mapping and Spin State Readout in Diamond (Adv. Quantum Technol. 12/2024)","authors":"Dominic Reinhardt,&nbsp;Julia Heupel,&nbsp;Cyril Popov,&nbsp;Ralf Wunderlich","doi":"10.1002/qute.202470035","DOIUrl":"https://doi.org/10.1002/qute.202470035","url":null,"abstract":"<p>Photocurrents in wide bandgap materials provide valuable insights into the dynamics of intrinsic defects. In article number 2400237, Ralf Wunderlich and co-workers use a commercially available charge integrator IC with switchable input on a printed circuit board (cover image) for low-noise current measurements with a resolution of about 100 fA. Thus, the authors can image and detect small numbers of individual defects in ultrapure diamond. Furthermore, the authors conduct photocurrent-detected magnetic resonance (PDMR) on NV centers. The work paves the way for low-cost, miniaturized, simple and time-resolved photocurrent measurements of solid-state defects.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202470035","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868346","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":"Back Cover: Purity-Assisted Zero-Noise Extrapolation for Quantum Error Mitigation (Adv. Quantum Technol. 12/2024)","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.202470037","DOIUrl":"https://doi.org/10.1002/qute.202470037","url":null,"abstract":"<p>Zero noise extrapolation (ZNE) is a method that amplifies and extrapolates noise to a noise-free point. The cover image shows a modified method called purity-assisted ZNE (pZNE). This method enhances the effectiveness of ZNE by accumulating the noises with the forward and backward evolutions to extrapolate the ideal expectation from noisy expectations along the purity of the noisy output state to the ideal pure state. For further details, see article number 2400150 by Kai Xu, Heng Fan, and co-workers.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202470037","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868348","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":"Inside Front Cover: Numerical Investigation of a Coupled Micropillar - Waveguide System for Integrated Quantum Photonic Circuits (Adv. Quantum Technol. 12/2024)","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.202470036","DOIUrl":"https://doi.org/10.1002/qute.202470036","url":null,"abstract":"<p>This cover image is the 3D rendering of a quantum photonic device concept consisting of a whispering gallery mode microlaser coupled to a ridge waveguide. Such a device could potentially be used to resonantly excite a single-photon emitter that is subsequently integrated into a ridge waveguide. This allows for on-chip and on-demand generation of single photons in the context of integrated quantum photonic circuits. In article number 2400195, Stephan Reitzenstein and co-workers use finite element simulations to investigate the resonance quality of the cavity and its coupling efficiency.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 12","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202470036","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868347","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":"Simultaneous Photon and Phonon Lasing From Pumping Optomechanical Systems with a Two-Tone Field","authors":"Vitalie Eremeev,&nbsp;Hugo Molinares,&nbsp;Luis A. Correa,&nbsp;Bing He","doi":"10.1002/qute.202400497","DOIUrl":"https://doi.org/10.1002/qute.202400497","url":null,"abstract":"<p>Achieving simultaneous lasing of photons and phonons in optomechanical setups has great potential for applications in quantum information processing, high precision sensing and the design of hybrid photonic–phononic devices. Here, this possibility is explored with an optomechanical system driven by a two-tone field. Whenever the difference between the driving frequencies matches the associated mechanical frequency, the photon and phonon populations are found to achieve steady-state coherent oscillations, demonstrating a dual lasing phenomenon. Such drive–tone resonance condition can synchronize the phases of the photon and phonon fields, which facilitates a robust simultaneous lasing. Here, analytical insights into the joint amplification of the optical and mechanical modes are provided, and further confirm the dual lasing phenomenon by numerically calculating the relevant correlation functions and the power spectrum. This setup, consisting of a single optomechanical cavity, is simpler than previous realizations of dual lasing and provides a clean understanding of the underlying mechanisms. This work thus paves the way for the development of novel strategies for the optimisation of optomechanical interactions through tailored driving schemes.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 3","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622717","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":"Versatile Quadrature Antenna for Precise Control of Large Electron Spin Ensembles in Diamond","authors":"Ruben Pellicer-Guridi,&nbsp;Koen Custers,&nbsp;Joseba Solozabal-Aldalur,&nbsp;Alexey Brodolin,&nbsp;Jason T. Francis,&nbsp;Miguel Varga,&nbsp;Asier Mongelos,&nbsp;Jorge Casanova,&nbsp;Margarethus M. Paulides,&nbsp;Gabriel Molina-Terriza","doi":"10.1002/qute.202400142","DOIUrl":"https://doi.org/10.1002/qute.202400142","url":null,"abstract":"<p>An easily reproducible inexpensive microwave antenna that can generate a strong and homogeneous magnetic field of arbitrary polarization is presented, which enables fast and coherent control of electron spins over a large volume. Unlike preceding works, a resonant antenna with ample optical access and which maintains its resonant behavior regardless of the proximity of other experimental hardware components is presented. This robustness is crucial as it enables using microscope objectives with short working distances to perform wide-field imaging/sensing with bulk diamonds. The antenna generates a magnetic field strength of 22.3 A <span></span><math>\u0000 <semantics>\u0000 <msup>\u0000 <mi>m</mi>\u0000 <mrow>\u0000 <mo>−</mo>\u0000 <mn>1</mn>\u0000 </mrow>\u0000 </msup>\u0000 <annotation>${rm m}^{-1}$</annotation>\u0000 </semantics></math> for 1 W total driving power, which doubles the power efficiency compared with previously reported patch antenna designs. The magnetic field homogeneity in a volume of <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>0.3</mn>\u0000 <msup>\u0000 <mtext>mm</mtext>\u0000 <mn>3</mn>\u0000 </msup>\u0000 </mrow>\u0000 <annotation>$0.3text{mm}^3$</annotation>\u0000 </semantics></math>, <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>0.6</mn>\u0000 <msup>\u0000 <mtext>mm</mtext>\u0000 <mn>3</mn>\u0000 </msup>\u0000 </mrow>\u0000 <annotation>$0.6text{mm}^3$</annotation>\u0000 </semantics></math> and <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>1</mn>\u0000 <msup>\u0000 <mtext>mm</mtext>\u0000 <mn>3</mn>\u0000 </msup>\u0000 </mrow>\u0000 <annotation>$1text{mm}^3$</annotation>\u0000 </semantics></math> is within 3%, 8% and 14%, respectively. The antenna can be driven off-resonance without affecting the ellipticity and inhomogeneity of the field, and has a full-width-at-half-maximum bandwidth of <span></span><math>\u0000 <semantics>\u0000 <mo>∼</mo>\u0000 <annotation>$sim$</annotation>\u0000 </semantics></math>200 MHz. Its resonant frequency can be tuned over a 400 MHz range via varactors. The PCB files are provided open-source. This work facilitates a robust and versatile piece of instrumentation, being particularly appealing for applications such as high sensitivity magnetometry and wide-field imaging/sensing with nitrogen-vacancy centers.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 3","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202400142","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622713","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":"Sensing Applications of PT-Symmetry in Non-Hermitian Photonic Systems","authors":"Zuoxian Wang,&nbsp;Zihua Liang,&nbsp;Jinsheng Hu,&nbsp;Peng Zhou,&nbsp;Lu Liu,&nbsp;Gen Hu,&nbsp;Weiyi Wang,&nbsp;Mao Ye","doi":"10.1002/qute.202400349","DOIUrl":"https://doi.org/10.1002/qute.202400349","url":null,"abstract":"<p>In recent years, rapid advances in non-Hermitian physics and PT-symmetry have brought new opportunities for ultra-sensitive sensing. Especially the presence of controllable non-conservative processes in optical and photonic systems has triggered the development of singularity-based sensing. By flexibly tuning gain, loss, and coupling strength, a series of high-resolution sensing approaches can be realized, with the potential of on-chip integration. Another important non-Hermitian singularity is the coherent perfect absorption-lasing (CPAL) point in the PT-broken phase, which manifests the coexistence of lasing and CPA, exhibiting intriguing properties with considerable sensing potential. As a crucial method for quantum sensing and metrology, the interaction between light and alkali-metal atomic ensembles promises unprecedented sensitivity in the measurement of ultra-weak magnetic field, inertia, and time. Therefore, extending the study of PT-symmetry and singularity-based sensing from conventional solid-state wave systems to diffusive systems such as atomic ensembles is attracting wide attention. In this review, the development of singularity-based sensing in PT/anti-PT symmetric non-Hermitian systems is summarized, with a special focus on photonic platforms including integration with waveguides, microcavities, metasurface, etc. In addition, sensing applications with discussion further extended to atomic ensembles, projecting future research trends in the field.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143119729","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":"Quantum Fourier Transformation Using Quantum Reservoir Computing Network","authors":"Lu-Fan Zhang,&nbsp;Lu Liu,&nbsp;Xing-yu Wu,&nbsp;Chuan Wang","doi":"10.1002/qute.202400396","DOIUrl":"https://doi.org/10.1002/qute.202400396","url":null,"abstract":"<p>Combining the benefits of quantum computing and artificial neural networks, quantum reservoir computing shows potential for handling complex tasks due to its access to the Hilbert space in exponential dimensions. In this study, the quantum Fourier transform algorithm is implemented utilizing quantum reservoir computing, demonstrating its unique advantages. For the random interactions within the reservoirs, quantum reservoir computing avoids the cost of precise control of the physical system. The proposed model only requires to optimize a linear readout layer, thus significantly reducing the computational cost required for training. The accuracy of the implementation is numerically demonstrated and the model is integrated into quantum circuits to correctly execute the quantum phase estimation algorithm. Additionally, the impacts of different reservoir structures and dissipation intensities within the reservoir, and the results indicate the robustness of the model are discussed.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 3","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622650","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":"Inside Front Cover: Nonlocality Enhanced Precision in Quantum Polarimetry via Entangled Photons (Adv. Quantum Technol. 11/2024)","authors":"Ali Pedram,&nbsp;Vira R. Besaga,&nbsp;Frank Setzpfandt,&nbsp;Özgür E. Müstecaplıoğlu","doi":"10.1002/qute.202470032","DOIUrl":"https://doi.org/10.1002/qute.202470032","url":null,"abstract":"<p>A quantum polarimetry method using entangled photons to improve measurement precision is introduced in article number 2400059 by Ali Pedram, Vira R. Besaga, Frank Setzpfandt, and Özgür E. Müstecaplıoğlu. By calculating precision bounds and estimating the rotation angle of optical elements, both theoretically and experimentally, it is shown that the capability of entanglement to enhance accuracy is diminished with noise. Experimental noise induces bias in estimators, reducing accuracy and precision depending on chosen estimators and noise channels.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 11","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202470032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642061","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}