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An experimental investigation of quantum frequency correlations resilience against white and colored noise 量子频率相关抗白噪声和有色噪声弹性的实验研究
IF 6.7 2区 物理与天体物理
Quantum Science and Technology Pub Date : 2025-08-20 DOI: 10.1088/2058-9565/adf7d0
Linda Sansoni, Eleonora Stefanutti and Andrea Chiuri
{"title":"An experimental investigation of quantum frequency correlations resilience against white and colored noise","authors":"Linda Sansoni, Eleonora Stefanutti and Andrea Chiuri","doi":"10.1088/2058-9565/adf7d0","DOIUrl":"https://doi.org/10.1088/2058-9565/adf7d0","url":null,"abstract":"Quantum technologies based on photons rely on correlated pairs generated through nonlinear optics. Hence, understanding the impact of disturbances is of paramount importance for the development of this innovative field. Here we focus on the quantum spectroscopy as one of the most promising quantum technique showing a realistic perspective for a future employment. In this field, the most interesting disturbance is represented by the frequency noise. We present an experiment aimed at testing and characterizing the resilience against different levels of white and colored noise and we include simulations to generalize our findings. With this work we demonstrate that the spectroscopical properties of both the target and the noise, as well as the strength of the quantum correlations, play a crucial role and could have e huge impact on the performances, especially in terms of achievable spectral resolution. Remarkably, the presence of a specific region where the technology is always robust against any kind of noise represents an advantage allowing to deal with optimal measurements and fully exploit the capabilities of this technology.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"14 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144898143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Complexity of Gaussian quantum optics with a limited number of non-linearities 具有有限数量非线性的高斯量子光学的复杂性
IF 6.7 2区 物理与天体物理
Quantum Science and Technology Pub Date : 2025-08-20 DOI: 10.1088/2058-9565/adf6d4
Michael G Jabbour and Leonardo Novo
{"title":"Complexity of Gaussian quantum optics with a limited number of non-linearities","authors":"Michael G Jabbour and Leonardo Novo","doi":"10.1088/2058-9565/adf6d4","DOIUrl":"https://doi.org/10.1088/2058-9565/adf6d4","url":null,"abstract":"It is well known in quantum optics that any process involving the preparation of a multimode Gaussian state, followed by a Gaussian operation and Gaussian measurements, can be efficiently simulated by classical computers. Here, we provide evidence that computing transition amplitudes of Gaussian processes with a single-layer of non-linearities is hard for classical computers. To this end, we show how an efficient algorithm to solve this problem could be used to efficiently approximate outcome probabilities of a Gaussian boson sampling experiment. We also extend this complexity result to the problem of computing transition probabilities of Gaussian processes with two layers of non-linearities, by developing a Hadamard test for continuous-variable systems that may be of independent interest. Given recent experimental developments in the implementation of photon-photon interactions, our results may inspire new schemes showing quantum computational advantage or algorithmic applications of non-linear quantum optical systems realizable in the near-term.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"10 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144898142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 teleportation of cat states with binary-outcome measurements 具有二元结果测量的量子隐形传态
IF 6.7 2区 物理与天体物理
Quantum Science and Technology Pub Date : 2025-08-20 DOI: 10.1088/2058-9565/adf572
Jingyan Feng, Mohan Zhang, Matteo Fadel and Tim Byrnes
{"title":"Quantum teleportation of cat states with binary-outcome measurements","authors":"Jingyan Feng, Mohan Zhang, Matteo Fadel and Tim Byrnes","doi":"10.1088/2058-9565/adf572","DOIUrl":"https://doi.org/10.1088/2058-9565/adf572","url":null,"abstract":"We propose a teleportation protocol involving beam splitting operations and binary-outcome measurements, such as parity measurements. These operations have a straightforward implementation using the dispersive regime of the Jaynes–Cummings Hamiltonian, making our protocol suitable for a broad class of platforms, including trapped ions, circuit quantum electrodynamics and acoustodynamics systems. In these platforms homodyne measurements of the bosonic modes are less natural than dispersive measurements, making standard continuous variable teleportation unsuitable. In our protocol, Alice is in possession of two bosonic modes and Bob a single mode. An entangled mode pair between Alice and Bob is created by performing a beam splitter operation on a cat state. An unknown qubit state encoded by cat states is then teleported from Alice to Bob after a beamsplitting operation, measurement sequence, and a conditional correction. In the case of multiple measurements, near-perfect fidelity can be obtained. We discuss the optimal parameters in order to maximize the fidelity under a variety of scenarios.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"190 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144898141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Single-atom imaging of 173 ... 173的单原子成像…
IF 6.7 2区 物理与天体物理
Quantum Science and Technology Pub Date : 2025-08-18 DOI: 10.1088/2058-9565/adf7cf
O Abdel Karim, A Muzi Falconi, R Panza, W Liu and F Scazza
{"title":"Single-atom imaging of 173 ...","authors":"O Abdel Karim, A Muzi Falconi, R Panza, W Liu and F Scazza","doi":"10.1088/2058-9565/adf7cf","DOIUrl":"https://doi.org/10.1088/2058-9565/adf7cf","url":null,"abstract":"We report on the trapping and imaging of individual ytterbium atoms in arrays of optical tweezers, loaded from a magneto-optical trap (MOT) formed by only five beams in an orthogonal configuration. In our five-beam MOT, operating on the narrow S P intercombination transition, gravity balances the radiation pressure of a single upward-directed beam. This approach enables efficient trapping and cooling of the most common ytterbium isotopes ( Yb, Yb and Yb) to K at densities atoms cm−3 within less than one second. This configuration allows for significantly reducing the complexity of the optical setup, potentially benefiting any ytterbium-atom based quantum science platform leveraging single-atom microscopy, from quantum processors to novel optical clocks. We then demonstrate the first single-atom-resolved imaging of the fermionic, large-spin isotope Yb ( ), employing a two-color imaging scheme that does not rely on magic-wavelength trapping. We achieve a high single-atom imaging fidelity of and a large survival probability of , despite large differential light shifts affecting all nuclear spin sublevels of the excited P state involved in the cooling transition. The demonstrated capabilities will play a key role in future quantum simulations and computing applications with Yb arrays.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"21 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144898146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Enhanced quantum signal control and sensing under multicolored noise via generalized filter function framework 利用广义滤波函数框架增强多色噪声下的量子信号控制与传感
IF 6.7 2区 物理与天体物理
Quantum Science and Technology Pub Date : 2025-08-18 DOI: 10.1088/2058-9565/adf915
Zhi-Da Zhang, Yao Song, Wen-Zheng Dong and Xiu-Hao Deng
{"title":"Enhanced quantum signal control and sensing under multicolored noise via generalized filter function framework","authors":"Zhi-Da Zhang, Yao Song, Wen-Zheng Dong and Xiu-Hao Deng","doi":"10.1088/2058-9565/adf915","DOIUrl":"https://doi.org/10.1088/2058-9565/adf915","url":null,"abstract":"The field of quantum control and sensing encounters challenges due to various forms of time-dependent noise. We introduce a generalized filter-function framework that treats noise coupling strength as a tunable control parameter, enabling target noise suppression across user-defined frequency bands. By optimizing this generalized filter function, we design band-selective control pulses that achieve high fidelity of single- and two-qubit gates under strong noise with diverse spectral profiles. We further extend the method to selectively enhance the signal-to-noise ratio for quantum sensing of AC signals with an enhanced precision of up to 12.58 dB. The resulting control pulses are experimentally feasible, offering a practical pathway toward robust quantum operations and high-precision sensing under spectrally complex noises.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"114 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144898147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
A general approach to quantum integration of cross sections in high-energy physics 高能物理中截面量子积分的一般方法
IF 6.7 2区 物理与天体物理
Quantum Science and Technology Pub Date : 2025-08-13 DOI: 10.1088/2058-9565/adf771
Ifan Williams and Mathieu Pellen
{"title":"A general approach to quantum integration of cross sections in high-energy physics","authors":"Ifan Williams and Mathieu Pellen","doi":"10.1088/2058-9565/adf771","DOIUrl":"https://doi.org/10.1088/2058-9565/adf771","url":null,"abstract":"We present universal building blocks for the quantum integration of generic cross sections in high-energy physics. We make use of Fourier quantum Monte Carlo integration (MCI) as implemented in Quantinuum’s Quantum MCI engine to provide an extendable methodology for generating efficient circuits that can implement generic cross-section calculations, providing a quadratic speed-up in root mean-squared error convergence with respect to classical MCI. We focus on a concrete example of a decay process to illustrate our work.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"17 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144839987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Optimized squeezing for accurate differential sensing under large phase noise 优化压缩，在大相位噪声下实现精确的差分传感
IF 6.7 2区 物理与天体物理
Quantum Science and Technology Pub Date : 2025-08-13 DOI: 10.1088/2058-9565/adf2d8
Robin Corgier, Marco Malitesta, Leonid A Sidorenkov, Franck Pereira Dos Santos, Gabriele Rosi, Guglielmo M Tino, Augusto Smerzi, Leonardo Salvi and Luca Pezzé
{"title":"Optimized squeezing for accurate differential sensing under large phase noise","authors":"Robin Corgier, Marco Malitesta, Leonid A Sidorenkov, Franck Pereira Dos Santos, Gabriele Rosi, Guglielmo M Tino, Augusto Smerzi, Leonardo Salvi and Luca Pezzé","doi":"10.1088/2058-9565/adf2d8","DOIUrl":"https://doi.org/10.1088/2058-9565/adf2d8","url":null,"abstract":"Atom interferometers are reaching sensitivities fundamentally constrained by quantum fluctuations. A main challenge is to integrate entanglement into quantum sensing protocols to enhance precision while ensuring robustness against noise and systematics. Here, we theoretically investigate differential phase measurements with two atom interferometers using spin-squeezed states of N atoms, accounting for common-mode phase noise spanning the full 2π range. We estimate the differential signal using model-free ellipse fitting, a robust method requiring no device calibration and resilient to additional noise sources. Our results show that spin-squeezing enables sensitivities below the standard quantum limit (SQL). Specifically, we identify optimal squeezed states that minimize the differential phase uncertainty, scaling as , thus overcoming the SQL by a factor , while eliminating the bias inherent in ellipse fitting methods. We benchmark our protocol against the Cramér–Rao bound and compare it with hybrid methods that incorporate auxiliary classical sensors. Our findings provide a pathway to robust and high-precision atom interferometry, in realistic noisy environments and using readily available states and estimation methods.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"48 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144839986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Learning time-varying Gaussian quantum lossy channels 学习时变高斯量子有损信道
IF 6.7 2区 物理与天体物理
Quantum Science and Technology Pub Date : 2025-08-13 DOI: 10.1088/2058-9565/adf6d2
Angela Rosy Morgillo, Stefano Mancini, Massimiliano F Sacchi and Chiara Macchiavello
{"title":"Learning time-varying Gaussian quantum lossy channels","authors":"Angela Rosy Morgillo, Stefano Mancini, Massimiliano F Sacchi and Chiara Macchiavello","doi":"10.1088/2058-9565/adf6d2","DOIUrl":"https://doi.org/10.1088/2058-9565/adf6d2","url":null,"abstract":"Time-varying quantum channels are essential for modeling realistic quantum systems with evolving noise properties. Here, we consider Gaussian lossy channels varying from one use to another and we employ neural networks to classify, regress, and forecast the behavior of these channels from their Choi-Jamiołkowski states. The networks achieve at least 87% of accuracy in distinguishing between non-Markovian, Markovian, memoryless, compound, and deterministic channels. In regression tasks, the model accurately reconstructs the loss parameter sequences, and in forecasting, it predicts future values, with improved performance as the memory parameter approaches 1 for Markovian channels. These results demonstrate the potential of neural networks in characterizing and predicting the dynamics of quantum channels.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"12 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144840223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Distributed quantum computing with black-box subroutines 带有黑盒子程序的分布式量子计算
IF 6.7 2区 物理与天体物理
Quantum Science and Technology Pub Date : 2025-08-13 DOI: 10.1088/2058-9565/adf6d5
Xiang Xu, Yuan-Dong Liu, Sha Shi, Yun-Jiang Wang and Dong-Sheng Wang
{"title":"Distributed quantum computing with black-box subroutines","authors":"Xiang Xu, Yuan-Dong Liu, Sha Shi, Yun-Jiang Wang and Dong-Sheng Wang","doi":"10.1088/2058-9565/adf6d5","DOIUrl":"https://doi.org/10.1088/2058-9565/adf6d5","url":null,"abstract":"In this work, we propose a general protocol for distributed quantum computing that accommodates arbitrary unknown subroutines. It can be applied to scale up quantum computing through multi-chip interconnection, as well as to tasks such as estimating unknown parameters or processes for circuit depth reduction and constructing secure quantum cryptographic protocols. Our protocol builds upon a few techniques we develop, such as the oblivious quantum teleportation and control, which can circumvent quantum no-go theorems on the manipulation of unknown objects. Furthermore, we demonstrate that this protocol can be physically implemented using currently available quantum computing platforms. These results suggest that our framework could provide a foundation for developing more advanced quantum algorithms and protocols in the future.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"79 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144840108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Landau level single-electron pumping 朗道级单电子抽运
IF 6.7 2区 物理与天体物理
Quantum Science and Technology Pub Date : 2025-08-11 DOI: 10.1088/2058-9565/adf6d3
E Pyurbeeva, M D Blumenthal, J A Mol, H Howe, H E Beere, T Mitchell, D A Ritchie and M Pepper
{"title":"Landau level single-electron pumping","authors":"E Pyurbeeva, M D Blumenthal, J A Mol, H Howe, H E Beere, T Mitchell, D A Ritchie and M Pepper","doi":"10.1088/2058-9565/adf6d3","DOIUrl":"https://doi.org/10.1088/2058-9565/adf6d3","url":null,"abstract":"We present a detailed study of the effect of a strong perpendicular magnetic field on single-electron pumping in a device utilising a finger-gate split-gate configuration, characterised by high pumping precision. In the quantum Hall regime, we demonstrate electron pumping from Landau levels in the leads, where the measurements exhibit pronounced fluctuations in the lengths of the pumping plateaus with magnetic field, reminiscent of Shubnikov–de Haas oscillations. In order to explain this similarity, we introduce a new physical model for the dynamics of the operation of a single-electron pump. We show that the pumping process is dependent on the density of states of the 2D electron gas in the leads within a single narrow energy window. Applying our model to experimental data allows for the determination of physical parameters of the pump and its operation; such as the capture energy of the electrons, the broadening of the quantised Landau levels in the leads, and the quantum lifetime of the electrons.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"737 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144819506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
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