Advanced quantum technologies最新文献

{"title":"Logistic Map Image Cryptography Scheme Based on Chaotic Quantum Boson Sampling","authors":"Wenxuan Wang,&nbsp;Jiaming Shi,&nbsp;Nan Guan,&nbsp;Jinjing Shi","doi":"10.1002/qute.202400579","DOIUrl":"10.1002/qute.202400579","url":null,"abstract":"<p>Images are crucial for digital signal transmission and face significant security challenges due to the growing sophistication of cyber threats. Although classical cryptography based on logistic map is commonly used for image encryption, it is often susceptible to periodic and predictable behaviors arising from specific initial conditions and parameter settings. The predictability poses a risk to the security of encryption system. In response to the challenges, this paper presents a novel image cryptography scheme, as the logistic map image cryptography scheme based on chaotic quantum Boson sampling (LM-BS), which combines the encryption strength of the logistic map with the inherent unpredictability of chaotic quantum Boson sampling(QBS). LM-BS scheme takes advantage of the distinctive properties of random interference among bosons in quantum systems, significantly enhancing the sensitivity, randomness, and unpredictability of encryption keys, which effectively addresses the periodicity and predictability challenges associated with traditional chaotic systems. Moreover, the image encryption experiments are put on the silicon photonic chips and the StrawberryFields photonic platform by using LM-BS scheme on various grey-scale images. The experimental results indicate that the LM-BS enables reliable image encryption and decryption, reduces the risk of key leakage, and successfully ensures the security and privacy of image transmission. Overall, the LM-BS scheme lays a strong theoretical foundation for future encryption based on quantum computation and demonstrates the considerable potential for a wide range of applications.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 9","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057770","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":"Topology-Optimized on-Chip Quantum Plasmonic Generator","authors":"Yifei Hua,&nbsp;Mikhail Y. Shalaginov,&nbsp;Zijian Qin,&nbsp;Hongsheng Chen,&nbsp;Huaping Wang,&nbsp;Lian Shen","doi":"10.1002/qute.202400657","DOIUrl":"10.1002/qute.202400657","url":null,"abstract":"<p>Scalable integrated single-photon sources are critical for quantum photonics and can enable applications such as high-speed quantum communication and quantum information processing. To establish a scalable platform, the single-photon sources require large on-chip photon extraction rates, which means the emission rates need to be substantially enhanced and the excited photons should be directly coupled to an on-chip circuit. The photon emission rate speed-up is best achieved via coupling to plasmonic nanostructures, while on-chip extraction can be realized by directly coupling emitters to dielectric nanofibers. However, current approaches to enhance emission speed in nanostructures have inadequately tackled the choice of metals and dielectrics. Additionally, they solely concentrate on individual aspects (spontaneous emission rate or coupling efficiency), thereby neglecting comprehensive performance. Here, drawing inspiration from additive manufacturing, a layer-by-layer topology optimization framework is proposed for an on-chip quantum plasmonic generator that can comprehensively enhance the photon extraction rate of the nitrogen-vacancy (NV) center. As a result, a topology-optimized three-layered hybrid structure is obtained that comprehensively enhances the spontaneous emission rate of the NV center and coupling efficiency into a dielectric nanofiber (<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>F</mi>\u0000 <mi>p</mi>\u0000 </msub>\u0000 <mo>×</mo>\u0000 <mi>η</mi>\u0000 <mo>≈</mo>\u0000 <mn>30</mn>\u0000 </mrow>\u0000 <annotation>${F_p} times eta approx 30$</annotation>\u0000 </semantics></math>). The work introduces an innovative approach to material selection and structural design for improving the performance of single-photon sources.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 9","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057842","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":"Reference-Frame-Independent Asynchronous Measurement-Device-Independent Quantum Key Distribution","authors":"Kaiyi Shi,&nbsp;Yue Li,&nbsp;Haoyang Wang,&nbsp;Chang Liu,&nbsp;Duo Ma,&nbsp;Yujia Zhang,&nbsp;Fangze Ma,&nbsp;Haiqiang Ma","doi":"10.1002/qute.202400711","DOIUrl":"10.1002/qute.202400711","url":null,"abstract":"<p>Asynchronous quantum key distribution protocol (AMDI-QKD) is a high performance quantum key distribution protocol while it can outperform the Pirandola–Laurenza–Ottaviani–Banchi (PLOB) bound without the need of phase-locking and phase-tracking techniques. However, the protocol applies the relative phase information of the communicating parties for encoding, and the drift of the reference frame inevitably affects the performance of the QKD system, whereas reference frame independent quantum key distribution (RFI-QKD) has the advantage of tolerating the slow change of the reference frame. In this study, a reference frame-independent asynchronous quantum key distribution (RFI-AMDI-QKD) scheme is proposed, which does not require phase alignment between the interferometers of both parties, and it is shown that the protocol can transmit over long distances and is robust to the drift of the reference frame.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 5","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143945037","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":"On-Chip Apodized Hybrid Photonic-Plasmonic Cavity QED for Polarized Single Photons Coupling","authors":"Subrat Sahu,&nbsp;Colin Jacob,&nbsp;Abhishek Kumar,&nbsp;Rajan Jha","doi":"10.1002/qute.202400712","DOIUrl":"10.1002/qute.202400712","url":null,"abstract":"<p>A system is proposed for the efficient coupling of plasmon-enhanced polarized single photons into a 1D apodized hybrid photonic-plasmonic (HPP) cavity structure, to realize cavity quantum electrodynamics (QED). The HPP cavity is formed by placing a gold nanorod (GNR) on an apodized 1D photonic crystal (PhC) cavity designed on a diamond waveguide. It is shown that the spontaneous emission of quantum emitters (QE) can be strongly enhanced by utilizing the combination of GNR and Phc cavity structure, leading to the emission of highly polarized and bright single photons. The Purcell factor is numerically estimated as high ≈5303, with a cavity-enhanced coupling efficiency of up to ≈24.3% and a degree of polarization (DOP) of more than 99%, in the guided modes of the HPP cavity. Under the resonance condition, a 28-fold increase in enhancement factor in the HPP cavity as compared to a moderate finesse-based Phc cavity is achieved. The cavity is designed to minimize the losses, resulting in a scattering-limited <i>Q</i>-factor and one-pass loss estimated to be around 21500 and 0.1%, respectively. This work paves the way to realize quantum photonic devices based on efficient photonic interfaces for on-chip quantum information processing applications.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 5","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944741","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 Temperature-Insensitive Optical Fiber Delay for Indistinguishability-Preserving Multiplexing of Photons","authors":"Eun Chae Ha,&nbsp;Young Hoon Kim,&nbsp;Hee Su Park,&nbsp;Kwang Yong Song","doi":"10.1002/qute.202400512","DOIUrl":"10.1002/qute.202400512","url":null,"abstract":"<p>Quantum state purity, namely indistinguishability, of photons having different propagation histories is a prerequisite of multiphoton quantum information processing such as quantum networking and quantum computing. Although photonic multiplexing techniques using optical fiber delays can enhance the scalability of quantum states, the sensitivity of optical fibers to ambient temperature fluctuations deteriorates the indistinguishability of photons. This work demonstrates a novel optical differential delay using polarization-maintaining fibers, which suppresses temperature dependence by balancing thermal expansion with modal dispersion in a fully passive mechanism. Time-multiplexed Hong–Ou–Mandel interferometry under temperature variations from 24 to 50 °C verifies the effectiveness of the devised structure in a practical quantum photonics environment.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202400512","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144273446","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":"Distributed Quantum Algorithm for the NISQ Era: A Novel Approach to Solving Simon's Problem with Reduced Resources","authors":"Xu Zhou,&nbsp;Yuchen Wang,&nbsp;Wenxuan Tao,&nbsp;Zhuojun Zhou,&nbsp;Le Luo","doi":"10.1002/qute.202500067","DOIUrl":"10.1002/qute.202500067","url":null,"abstract":"&lt;p&gt;Distributed quantum computation has gained significant interest in the noisy intermediate-scale quantum (NISQ) era. This paradigm requires each computing node to possess a reduced number of qubits and quantum gates. In this study, a Distributed Simon's Algorithm (DSA) is designed to tackle Simon's problem, which entails the discovery of a hidden string &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;s&lt;/mi&gt;\u0000 &lt;mo&gt;∈&lt;/mo&gt;\u0000 &lt;msup&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;{&lt;/mo&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;mo&gt;,&lt;/mo&gt;\u0000 &lt;mn&gt;1&lt;/mn&gt;\u0000 &lt;mo&gt;}&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mi&gt;n&lt;/mi&gt;\u0000 &lt;/msup&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$s in lbrace 0,1rbrace ^n$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; of a promised Boolean function &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;f&lt;/mi&gt;\u0000 &lt;mo&gt;:&lt;/mo&gt;\u0000 &lt;msup&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;{&lt;/mo&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;mo&gt;,&lt;/mo&gt;\u0000 &lt;mn&gt;1&lt;/mn&gt;\u0000 &lt;mo&gt;}&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mi&gt;n&lt;/mi&gt;\u0000 &lt;/msup&gt;\u0000 &lt;mo&gt;→&lt;/mo&gt;\u0000 &lt;msup&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;{&lt;/mo&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;mo&gt;,&lt;/mo&gt;\u0000 &lt;mn&gt;1&lt;/mn&gt;\u0000 &lt;mo&gt;}&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mi&gt;m&lt;/mi&gt;\u0000 &lt;/msup&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$f: lbrace 0,1rbrace ^n rightarrow lbrace 0,1rbrace ^m$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, where &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;f&lt;/mi&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;mi&gt;x&lt;/mi&gt;\u0000 &lt;mo&gt;)&lt;/mo&gt;\u0000 &lt;mo&gt;=&lt;/mo&gt;\u0000 &lt;mi&gt;f&lt;/mi&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;mi&gt;y&lt;/mi&gt;\u0000 &lt;mo&gt;)&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$f(x)=f(y)$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; if and only if &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;x&lt;/mi&gt;\u0000 &lt;mo&gt;=&lt;/mo&gt;\u0000 &lt;mi&gt;y&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$x=y$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; or &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;x&lt;/mi&gt;\u0000 &lt;mi&gt;⊕&lt;/mi&gt;\u0000 &lt;mi&gt;y&lt;/mi&gt;\u0000 &lt;mo&gt;=&lt;/mo&gt;\u0000 &lt;mi&gt;s&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$x oplus y = s$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;. Specifically, 1) our algorithm is capable of being partitioned into any &lt;span&gt;&lt;/","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 5","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944753","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":"Ultrahigh Extinction Ratio Topological Polarization Beam Splitter Based on Dual-Polarization Second-Order Topological Photonic Crystals","authors":"Chao-Sheng Deng,&nbsp;Zhuo-Xun Peng,&nbsp;Bo-Xun Li","doi":"10.1002/qute.202400637","DOIUrl":"10.1002/qute.202400637","url":null,"abstract":"<p>A novel configuration of dual-polarization second-order topological photonic crystal (SOTPC) is presented, which is constructed by drilling 8-shaped air holes on the dielectric background, and propose a scheme to achieve a wide common bandgap within this SOTPC for both transverse-magnetic (TM) and transverse-electric (TE) polarizations. The dual-polarization topological transport of edge states along three different straight waveguides is demonstrated. Then proposed, for the first time, a T-shaped SOTPC-based topological polarization beam splitter (TPBS) and validate the ability of this TPBS to effectively separate TM and TE modes over a broad operating bandwidth. Ultrahigh extinction ratios of 108 dB for TM polarization and 112 dB for TE polarization are simultaneously achieved at the wavelength of 1550 nm. Moreover, it is demonstrated that the polarization beam splitting effect, along with the corresponding performance of the TPBS, exhibits significant robustness against structural defects. Given the excellent features of the proposed TPBS, such as very compact footprint, ultrahigh extinction ratios and wide operating bandwidth, its potential is anticipated as a promising platform for applications in polarization multiplexing photonic integrated circuits and optical communication systems.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 9","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057887","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":"Deterministic Conversion from GHZ State to W State with Rydberg Superatoms","authors":"Ying-Li Liu,&nbsp;Wen-Xue Cui,&nbsp;Shou Zhang,&nbsp;Hong-Fu Wang","doi":"10.1002/qute.202400663","DOIUrl":"10.1002/qute.202400663","url":null,"abstract":"<p>Quantum entanglement is playing an increasingly crucial role in the field of quantum information. The conversion between different types of entangled states, especially for GHZ state and W state, can greatly enhance the efficiency of quantum information processing. Here, a two-step scheme is proposed to realize the conversion between GHZ state and W state with Rydberg superatoms, in which the collective states of superatom are used to encode quantum information. In the first step, let a single-photon pulse pass through two cavities that trap superatoms in sequence and detect the state of photon to complete this task. In the second step, shortcuts are employed to adiabaticity based on superadiabatic technique and design appropriate Rabi frequencies for the system. The numerical simulations demonstrate that this scheme possesses a high fidelity and exhibits robustness against detrimental effects such as atomic spontaneous emission, cavity losses, fiber photon leakages and noise. Furthermore, the intricate pulses within this scheme are decomposed into a linear superposition of Gaussian pulses, enhancing experimental feasibility. Finally, the scheme is extended to deal with the scenario of multi-superatom. This method provides a way to convert other types of entangled states.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 9","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057974","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":"Epitaxial Growth of Molecular Graphene on Metal Surface Alloy","authors":"Biyu Song,&nbsp;Xiamin Hao,&nbsp;Chenqiang Hua,&nbsp;Meimei Wu,&nbsp;Guoxiang Zhi,&nbsp;Wenjin Gao,&nbsp;Tianchao Niu,&nbsp;Miao Zhou","doi":"10.1002/qute.202400621","DOIUrl":"10.1002/qute.202400621","url":null,"abstract":"<p>Molecular graphene provides an attractive man-made artificial system to realize designer Dirac fermions with exotic properties and significant implications in electronics/spintronics, but its large-scale fabrication remains a challenge as the available approach involves molecule-by-molecule manipulation of CO on a metal surface using a scanning tunneling microscopy tip. Here, we propose the epitaxial growth of molecular graphene on metal surface alloy, where CO molecules could be naturally self-assembled into a hexagonal lattice. Via high-throughput first-principles calculations, the adsorption behaviors of CO on 30 surface alloys Cu₂M (M represents the alloyed element) with a (<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msqrt>\u0000 <mn>3</mn>\u0000 </msqrt>\u0000 <mo>×</mo>\u0000 <mrow></mrow>\u0000 <msqrt>\u0000 <mn>3</mn>\u0000 </msqrt>\u0000 </mrow>\u0000 <annotation>$sqrt{3}ensuremath{times{}}sqrt{3}$</annotation>\u0000 </semantics></math>)-<i>R</i>30° superstructure on Cu(111) is explored. By systematically analyzing the structures, energetic and electronic properties of the adsorbed systems with different CO coverages, three surface alloys, Cu₂Zn, Cu₂Ga, and Cu₂Ge, on which molecular graphene can be spontaneously formed, are successfully screened out. Remarkably, the self-assembled molecular graphene is featured by an effective four-band model involving the molecular (<span></span><math>\u0000 <semantics>\u0000 <msubsup>\u0000 <mi>π</mi>\u0000 <mrow>\u0000 <mn>2</mn>\u0000 <msub>\u0000 <mi>p</mi>\u0000 <mi>x</mi>\u0000 </msub>\u0000 </mrow>\u0000 <mo>∗</mo>\u0000 </msubsup>\u0000 <annotation>$pi _{{mathrm{2}}{p_{mathrm{x}}}}^{mathrm{*}}$</annotation>\u0000 </semantics></math>, <span></span><math>\u0000 <semantics>\u0000 <msubsup>\u0000 <mi>π</mi>\u0000 <mrow>\u0000 <mn>2</mn>\u0000 <msub>\u0000 <mi>p</mi>\u0000 <mi>y</mi>\u0000 </msub>\u0000 </mrow>\u0000 <mo>*</mo>\u0000 </msubsup>\u0000 <annotation>${pi}_{2{p}_{mathrm{y}}}^{ast}$</annotation>\u0000 </semantics></math>) orbitals of CO on a hexagonal lattice, leading to quantum spin Hall effect. This work paves an avenue for the large-scale growth of artificial graphene, which should stimulate immediate interest among experimentalists in the synthesis, characterization, and implementation of topological states for dissipationless transport and quantum computing.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144273229","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":"Kerr-Effect-Based High-Dimensional Entanglement Generation for Qudit Systems","authors":"Ming Ma,&nbsp;Qiang Zhu,&nbsp;Fang-Fang Du","doi":"10.1002/qute.202500010","DOIUrl":"10.1002/qute.202500010","url":null,"abstract":"<p>Employing high-dimensional photonic encodings (qudits) instead of the traditional 2D encodings (qubits) can significantly enhance loss tolerance and reduce computational resources in photon-based quantum information technology (QIT). To tap into this potential, effective schemes for the high-dimensional generation of entangled states are essential. In this study, two arbitrary 4D entanglement generation protocols based on cross-Kerr effect are developed, including two-qudit entangled states with two photon pairs and three-qudit entangled states with three photon pairs. These 4D entangled states require neither auxiliary photons (or entangled states) nor complicated quantum circuits. The success probabilities of high-dimensional entangled states are close to 1 and their fidelities are robust against the photon loss with the current technology. The 4D entangled states depend on only simple linear-optics elements, available four-dimensional single-qudit operations, and mature measurement methods, making our proposed protocols feasible and efficient in practical QIT.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"8 5","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944731","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}