npj Quantum Information最新文献_第10页

Simulating photosynthetic energy transport on a photonic network 模拟光子网络上的光合作用能量传输

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-03-11 DOI: 10.1038/s41534-024-00824-x

Hao Tang, Xiao-Wen Shang, Zi-Yu Shi, Tian-Shen He, Zhen Feng, Tian-Yu Wang, Ruoxi Shi, Hui-Ming Wang, Xi Tan, Xiao-Yun Xu, Yao Wang, Jun Gao, M. S. Kim, Xian-Min Jin

{"title":"Simulating photosynthetic energy transport on a photonic network","authors":"Hao Tang, Xiao-Wen Shang, Zi-Yu Shi, Tian-Shen He, Zhen Feng, Tian-Yu Wang, Ruoxi Shi, Hui-Ming Wang, Xi Tan, Xiao-Yun Xu, Yao Wang, Jun Gao, M. S. Kim, Xian-Min Jin","doi":"10.1038/s41534-024-00824-x","DOIUrl":"https://doi.org/10.1038/s41534-024-00824-x","url":null,"abstract":"Quantum effects in photosynthetic energy transport in nature, especially for the typical Fenna-Matthews-Olson (FMO) complexes, are extensively studied in quantum biology. Such energy transport processes can be investigated as open quantum systems that blend the quantum coherence and environmental noise, and have been experimentally simulated on a few quantum devices. However, the existing experiments always lack a solid quantum simulation for the FMO energy transport due to their constraints to map a variety of issues in actual FMO complexes that have rich biological meanings. Here we successfully map the full coupling profile of the seven-site FMO structure by comprehensive characterisation and precise control of the evanescent coupling of the three-dimensional waveguide array. By applying a stochastic dynamical modulation on each waveguide, we introduce the base site energy and the dephasing term in coloured noise to faithfully simulate the power spectral density of the FMO complexes. We show our photonic model well interprets the phenomena including reorganisation energy, vibrational assistance, exciton transfer and energy localisation. We further experimentally demonstrate the existence of an optimal transport efficiency at certain dephasing strength, providing a window to closely investigate environment-assisted quantum transport.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"18 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140104716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-symmetric Pauli spin blockade in a silicon double quantum dot 硅双量子点中的非对称保利自旋封锁

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-03-06 DOI: 10.1038/s41534-024-00820-1

Theodor Lundberg, David J. Ibberson, Jing Li, Louis Hutin, José C. Abadillo-Uriel, Michele Filippone, Benoit Bertrand, Andreas Nunnenkamp, Chang-Min Lee, Nadia Stelmashenko, Jason W. A. Robinson, Maud Vinet, Lisa Ibberson, Yann-Michel Niquet, M. Fernando Gonzalez-Zalba

{"title":"Non-symmetric Pauli spin blockade in a silicon double quantum dot","authors":"Theodor Lundberg, David J. Ibberson, Jing Li, Louis Hutin, José C. Abadillo-Uriel, Michele Filippone, Benoit Bertrand, Andreas Nunnenkamp, Chang-Min Lee, Nadia Stelmashenko, Jason W. A. Robinson, Maud Vinet, Lisa Ibberson, Yann-Michel Niquet, M. Fernando Gonzalez-Zalba","doi":"10.1038/s41534-024-00820-1","DOIUrl":"https://doi.org/10.1038/s41534-024-00820-1","url":null,"abstract":"Spin qubits in gate-defined silicon quantum dots are receiving increased attention thanks to their potential for large-scale quantum computing. Readout of such spin qubits is done most accurately and scalably via Pauli spin blockade (PSB), however, various mechanisms may lift PSB and complicate readout. In this work, we present an experimental study of PSB in a multi-electron low-symmetry double quantum dot (DQD) in silicon nanowires. We report on the observation of non-symmetric PSB, manifesting as blockaded tunneling when the spin is projected to one QD of the pair but as allowed tunneling when the projection is done into the other. By analyzing the interaction of the DQD with a readout resonator, we find that PSB lifting is caused by a large coupling between the different electron spin manifolds of 7.90 μeV and that tunneling is incoherent. Further, magnetospectroscopy of the DQD in 16 charge configurations, enables reconstructing the energy spectrum of the DQD and reveals the lifting mechanism is energy-level selective. Our results indicate enhanced spin-orbit coupling which may enable all-electrical qubit control of electron spins in silicon nanowires.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"10 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140043513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analyzing variational quantum landscapes with information content 分析具有信息含量的变分量子景观

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-02-29 DOI: 10.1038/s41534-024-00819-8

Adrián Pérez-Salinas, Hao Wang, Xavier Bonet-Monroig

引用次数: 0

Variational quantum algorithm for experimental photonic multiparameter estimation 用于光子多参数估计实验的变量量子算法

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-02-28 DOI: 10.1038/s41534-024-00821-0

Valeria Cimini, Mauro Valeri, Simone Piacentini, Francesco Ceccarelli, Giacomo Corrielli, Roberto Osellame, Nicolò Spagnolo, Fabio Sciarrino

{"title":"Variational quantum algorithm for experimental photonic multiparameter estimation","authors":"Valeria Cimini, Mauro Valeri, Simone Piacentini, Francesco Ceccarelli, Giacomo Corrielli, Roberto Osellame, Nicolò Spagnolo, Fabio Sciarrino","doi":"10.1038/s41534-024-00821-0","DOIUrl":"https://doi.org/10.1038/s41534-024-00821-0","url":null,"abstract":"Variational quantum metrology represents a powerful tool to optimize estimation strategies, resulting particularly beneficial for multiparameter estimation problems that often suffer from limitations due to the curse of dimensionality and computational complexity. To overcome these challenges, we develop a variational approach able to efficiently optimize a quantum multiphase sensor. Leveraging the reconfigurability of an integrated photonic device, we implement a hybrid quantum-classical feedback loop able to enhance the estimation performances. The quantum circuit evaluations are used to compute the system partial derivatives by applying the parameter-shift rule, and thus reconstruct experimentally the Fisher information matrix. This in turn is adopted as the cost function of a classical learning algorithm run to optimize the measurement settings. Our experimental results showcase significant improvements in estimation accuracy and noise robustness, highlighting the potential of variational techniques for practical applications in quantum sensing and more generally in quantum information processing using photonic circuits.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"2 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139994283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient bosonic nonlinear phase gates 高效玻色非线性相位门

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-02-23 DOI: 10.1038/s41534-024-00816-x

Kimin Park, Radim Filip

引用次数: 0

Wide-field Fourier magnetic imaging with electron spins in diamond 利用钻石中的电子自旋进行宽场傅立叶磁成像

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-02-21 DOI: 10.1038/s41534-024-00818-9

Zhongzhi Guo, You Huang, Mingcheng Cai, Chunxing Li, Mengze Shen, Mengqi Wang, Pei Yu, Ya Wang, Fazhan Shi, Pengfei Wang, Jiangfeng Du

引用次数: 0

Better-than-classical Grover search via quantum error detection and suppression 通过量子错误检测和抑制实现优于经典的格罗弗搜索

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-02-20 DOI: 10.1038/s41534-023-00794-6

Bibek Pokharel, Daniel A. Lidar

引用次数: 0

Rapid single-shot parity spin readout in a silicon double quantum dot with fidelity exceeding 99% 硅双量子点中的快速单次奇偶自旋读出，保真度超过 99

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-02-13 DOI: 10.1038/s41534-024-00813-0

Kenta Takeda, Akito Noiri, Takashi Nakajima, Leon C. Camenzind, Takashi Kobayashi, Amir Sammak, Giordano Scappucci, Seigo Tarucha

引用次数: 0

High temperature spin selectivity in a quantum dot qubit using reservoir spin accumulation 利用储层自旋积累实现量子点量子比特的高温自旋选择性

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-02-03 DOI: 10.1038/s41534-024-00815-y

R. Jansen, S. Yuasa

{"title":"High temperature spin selectivity in a quantum dot qubit using reservoir spin accumulation","authors":"R. Jansen, S. Yuasa","doi":"10.1038/s41534-024-00815-y","DOIUrl":"https://doi.org/10.1038/s41534-024-00815-y","url":null,"abstract":"Employing spins in quantum dots for fault-tolerant quantum computing in large-scale qubit arrays with on-chip control electronics requires high-fidelity qubit operation at elevated temperature. This poses a challenge for single spin initialization and readout. Existing schemes rely on Zeeman splitting or Pauli spin blockade with typical energy scales of 0.1 or 1 meV for electron-based qubits, so that sufficient fidelity is obtained only at temperatures around or below 0.1 or 1 K, respectively. Here we describe a method to achieve high temperature spin selectivity in a quantum dot using a reservoir with a spin accumulation, which deterministically sets the spin of a single electron on the dot. Since spin accumulation as large as 10 meV is achievable in silicon, spin selection with electrically adjustable error rates below 10−4 is possible even in a liquid He bath at 4 K. Via the reservoir spin accumulation, induced and controlled by a nearby ferromagnet, classical information (magnetization direction) is mapped onto a spin qubit. These features provide the prospect of spin qubit operation at elevated temperatures and connect the worlds of quantum computing and spintronics.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"5 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2024-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139660987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantum storage of 1650 modes of single photons at telecom wavelength 电信波长下 1650 个单光子模式的量子存储

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2024-02-01 DOI: 10.1038/s41534-024-00812-1

Shi-Hai Wei, Bo Jing, Xue-Ying Zhang, Jin-Yu Liao, Hao Li, Li-Xing You, Zhen Wang, You Wang, Guang-Wei Deng, Hai-Zhi Song, Daniel Oblak, Guang-Can Guo, Qiang Zhou

{"title":"Quantum storage of 1650 modes of single photons at telecom wavelength","authors":"Shi-Hai Wei, Bo Jing, Xue-Ying Zhang, Jin-Yu Liao, Hao Li, Li-Xing You, Zhen Wang, You Wang, Guang-Wei Deng, Hai-Zhi Song, Daniel Oblak, Guang-Can Guo, Qiang Zhou","doi":"10.1038/s41534-024-00812-1","DOIUrl":"https://doi.org/10.1038/s41534-024-00812-1","url":null,"abstract":"To advance the full potential of quantum networks one should be able to distribute quantum resources over long distances at appreciable rates. As a consequence, all components in such networks need to have large multimode capacity to manipulate photonic quantum states. Towards this end, a photonic quantum memory with a large multimode capacity, especially one operating at telecom wavelength, remains an important challenge. Here we optimize the preparation of atomic frequency combs and demonstrate a spectro-temporally multiplexed quantum memory in a 10-m-long cryogenically cooled erbium doped silica fibre. Our multiplexing storage has five spectral channels - each 10 GHz wide with 5 GHz separation - with up to 330 temporal modes in each, thus resulting in a simultaneous storage of 1,650 modes of heralded single photons with a 1000-fold increasing in coincidence detection rate with respect to single mode storage. Our results could pave the way for high speed quantum networks compatible with the infrastructure of fibre optical communication.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"15 3 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139655801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0