Optica Quantum最新文献_第3页

Temperature-independent almost perfect photon entanglement from quantum dots via the SUPER scheme 通过 SUPER 方案实现量子点与温度无关的近乎完美的光子纠缠

Optica Quantum Pub Date : 2023-12-18 DOI: 10.1364/opticaq.498559

Thomas K. Bracht, Moritz Cygorek, Tim Seidelmann, Vollrath Martin Axt, and Doris E. Reiter

引用次数: 0

Simulation of quantum optics by coherent state decomposition 通过相干态分解模拟量子光学

Optica Quantum Pub Date : 2023-12-15 DOI: 10.1364/opticaq.504311

Jeffrey Marshall and Namit Anand

{"title":"Simulation of quantum optics by coherent state decomposition","authors":"Jeffrey Marshall and Namit Anand","doi":"10.1364/opticaq.504311","DOIUrl":"https://doi.org/10.1364/opticaq.504311","url":null,"abstract":"We introduce a framework for simulating quantum optics by decomposing the system into a finite rank (number of terms) superposition of coherent states. This allows us to define a resource theory, where linear optical operations are “free” (i.e., do not increase the rank), and the simulation complexity for an m-mode system scales quadratically in m, in stark contrast to the Hilbert space dimension. We outline this approach explicitly in the Fock basis, relevant in particular for Boson sampling, where the simulation time (space) complexity for computing output amplitudes, to arbitrary accuracy, scales as O(m2 2n) [O(m2n)] for n photons distributed among m modes. We additionally demonstrate that linear optical simulations with the n photons initially in the same mode scales efficiently, as O(m2 n). This paradigm provides a practical notion of “non-classicality,” i.e., the classical resources required for simulation. Moreover, by making connections to the stellar rank formalism, we show this comes from two independent contributions, the number of single-photon additions and the amount of squeezing.","PeriodicalId":501828,"journal":{"name":"Optica Quantum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138693321","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

Continuous entanglement distribution from an AlGaAs-on-insulator microcomb for quantum communications 用于量子通信的砷化镓绝缘体微蜂窝的连续纠缠分布

Optica Quantum Pub Date : 2023-12-15 DOI: 10.1364/opticaq.510032

Trevor J. Steiner, Maximilian Shen, Joshua E. Castro, John E. Bowers, and Galan Moody

{"title":"Continuous entanglement distribution from an AlGaAs-on-insulator microcomb for quantum communications","authors":"Trevor J. Steiner, Maximilian Shen, Joshua E. Castro, John E. Bowers, and Galan Moody","doi":"10.1364/opticaq.510032","DOIUrl":"https://doi.org/10.1364/opticaq.510032","url":null,"abstract":"Using an aluminum gallium arsenide microring resonator, we demonstrate a bright quantum optical microcomb with >300 nm (>40 THz) bandwidth and more than 20 sets of time–energy entangled modes, enabling spectral demultiplexing with simple, off-the-shelf commercial telecom components. We report high-rate continuous entanglement distribution for two sets of entangled-photon pair frequency modes exhibiting up to 20 GHz/mW2 pair generation rate. As an illustrative example of entanglement distribution, we perform a continuous-wave time-bin quantum key distribution protocol with 8 kbps sifted key rates while maintaining less than 10% error rate and sufficient two-photon visibility to ensure security of the channel. When the >20 frequency modes are multiplexed, we estimate >100 kbps entanglement-based key rates or the creation of a multi-user quantum communications network. The entire system requires less than 110 µW of on-chip optical power, demonstrating an efficient source of entangled frequency modes for quantum communications. As a proof of principle, a quantum key is distributed across 12 km of deployed fiber on the University of California Santa Barbara (UCSB) campus and used to encrypt a 21 kB image with <9{% }<script type=\"math/tex\"><9{% }</script> error.","PeriodicalId":501828,"journal":{"name":"Optica Quantum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138693322","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: 0

Nonlocal phase modulation of multimode, continuous-variable twin beams 多模连续可变孪生光束的非局部相位调制

Optica Quantum Pub Date : 2023-12-15 DOI: 10.1364/opticaq.505870

Zhifan Zhou, Luís E. E. de Araujo, Matt DiMario, B. E. Anderson, Jie Zhao, Kevin M. Jones, and Paul D. Lett

引用次数: 0

Experimental solutions to the high-dimensional mean king’s problem 高维均值王问题的实验解决方案

Optica Quantum Pub Date : 2023-12-13 DOI: 10.1364/opticaq.502451

Tareq Jaouni, Xiaoqin Gao, Sören Arlt, Mario Krenn, and Ebrahim Karimi

{"title":"Experimental solutions to the high-dimensional mean king’s problem","authors":"Tareq Jaouni, Xiaoqin Gao, Sören Arlt, Mario Krenn, and Ebrahim Karimi","doi":"10.1364/opticaq.502451","DOIUrl":"https://doi.org/10.1364/opticaq.502451","url":null,"abstract":"Vaidman, Aharanov, and Albert [Phys. Rev. Lett. 58(14), 1385 (1987) [CrossRef] ] put forward a puzzle called the mean king’s problem (MKP) that can be solved only by harnessing quantum entanglement. Prime-powered solutions to the problem have been shown to exist, but they have not yet been experimentally realized for any dimension beyond two. We propose a general first-of-its-kind experimental scheme for solving the MKP in prime dimensions (D). Our search is guided by the digital discovery framework Pytheus, which finds highly interpretable graph-based representations of quantum optical experimental setups; using it, we find specific solutions and generalize to higher dimensions through human insight. As proof of principle, we present a detailed investigation of our solution for the three-, five-, and seven-dimensional cases. We obtain maximum success probabilities of 82.3%<script type=\"math/tex\">82.3{% }</script>, 56.2%<script type=\"math/tex\">56.2{% }</script>, and 35.5%<script type=\"math/tex\">35.5 {% }</script>, respectively. We therefore posit that our computer-inspired scheme yields solutions that implement Alice’s strategy with quantum advantage, demonstrating its promise for experimental implementation in quantum communication tasks.","PeriodicalId":501828,"journal":{"name":"Optica Quantum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138693379","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

Correlations for symmetric states: what subsets of photons are doing within a beam of light 对称态的相关性：光子子集在光束中的作用

Optica Quantum Pub Date : 2023-11-28 DOI: 10.1364/opticaq.501218

Aaron Goldberg

引用次数: 0

Low-noise Balanced Homodyne Detection with Superconducting Nanowire Single-Photon Detectors 利用超导纳米线单光子探测器进行低噪声平衡同调探测

Optica Quantum Pub Date : 2023-07-31 DOI: 10.1364/opticaq.502201

Maximilian Protte, Timon Schapeler, Jan Sperling, T. Bartley

引用次数: 0

Contributions to the optical linewidth of shallow donor-bound excitonic transition in ZnO 对氧化锌中浅供体结合激子转变光线宽的贡献

Optica Quantum Pub Date : 2023-07-24 DOI: 10.1364/opticaq.501568

Vasileios Niaouris, Samuel H. D'Ambrosia, C. Zimmermann, Xingyi Wang, Ethan Hansen, Michael Titze, E. Bielejec, Kai Fu

{"title":"Contributions to the optical linewidth of shallow donor-bound excitonic transition in ZnO","authors":"Vasileios Niaouris, Samuel H. D'Ambrosia, C. Zimmermann, Xingyi Wang, Ethan Hansen, Michael Titze, E. Bielejec, Kai Fu","doi":"10.1364/opticaq.501568","DOIUrl":"https://doi.org/10.1364/opticaq.501568","url":null,"abstract":"We study the donor-bound exciton optical linewidth properties of Al, Ga and In donor ensembles in single-crystal zinc oxide (ZnO). Neutral shallow donors (D$^0$) in ZnO are spin qubits with optical access via the donor-bound exciton (D$^0$X). This spin-photon interface enables applications in quantum networking, memories and transduction. Essential optical parameters which impact the spin-photon interface include radiative lifetime, optical inhomogeneous and homogeneous linewidth and optical depth. The ensemble photoluminescence linewidth ranges from 4-11 GHz, less than two orders of magnitude larger than the expected lifetime-limited linewidth. The ensemble linewidth remains narrow in absorption measurements through the 300 $mu$m-thick sample, which has an estimated optical depth up to several hundred. Homogeneous broadening of the ensemble line due to phonons is consistent with thermal population relaxation between D$^0$X states. This thermal relaxation mechanism has negligible contribution to the total linewidth at 2 K. We find that inhomogeneous broadening due to the disordered isotopic environment in natural ZnO is significant, ranging from 1.9 GHz - 2.2 GHz. Two-laser spectral anti-hole burning measurements, which can be used to measure the homogeneous linewidth in an ensemble, however, reveal spectral anti-hole linewidths similar to the single laser ensemble linewidth. Despite this broadening, the high homogeneity, large optical depth and potential for isotope purification indicate that the optical properties of the ZnO donor-bound exciton are promising for a wide range of quantum technologies and motivate a need to improve the isotope and chemical purity of ZnO for quantum technologies.","PeriodicalId":501828,"journal":{"name":"Optica Quantum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139355846","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: 0

Eavesdropper localization for quantum and classical channels via nonlinear scattering 通过非线性散射实现量子和经典信道的窃听器定位

Optica Quantum Pub Date : 2023-06-25 DOI: 10.1364/opticaq.502944

A. Popp, F. Sedlmeir, B. Stiller, C. Marquardt

{"title":"Eavesdropper localization for quantum and classical channels via nonlinear scattering","authors":"A. Popp, F. Sedlmeir, B. Stiller, C. Marquardt","doi":"10.1364/opticaq.502944","DOIUrl":"https://doi.org/10.1364/opticaq.502944","url":null,"abstract":"Optical fiber networks are part of important critical infrastructure and known to be prone to eavesdropping attacks. Hence cryptographic methods have to be used to protect communication. Quantum key distribution (QKD), at its core, offers information theoretical security based on the laws of physics. In deployments one has to take into account practical security and resilience. The latter includes the localization of a possible eavesdropper after an anomaly has been detected by the QKD system to avoid denial-of-service. Here, we present a novel approach to eavesdropper location that can be employed in quantum as well as classical channels using stimulated Brillouin scattering. The tight localization of the acoustic wave inside the fiber channel using correlated pump and probe waves allows to discover the coordinates of a potential threat within centimeters. We demonstrate that our approach outperforms conventional OTDR in the task of localizing an evanescent outcoupling of 1% with cm precision inside standard optical fibers. The system is furthermore able to clearly distinguish commercially available standard SMF28 from different manufacturers, paving the way for fingerprinted fibers in high security environments.","PeriodicalId":501828,"journal":{"name":"Optica Quantum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139368608","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: 0