Communications Physics最新文献_第6页

Dissipative realization of Kondo models. 近藤模型的耗散实现。

IF 5.4 1区物理与天体物理

Communications Physics Pub Date : 2025-01-01 Epub Date: 2025-05-22 DOI: 10.1038/s42005-025-02141-x

Martino Stefanini, Yi-Fan Qu, Tilman Esslinger, Sarang Gopalakrishnan, Eugene Demler, Jamir Marino

{"title":"Dissipative realization of Kondo models.","authors":"Martino Stefanini, Yi-Fan Qu, Tilman Esslinger, Sarang Gopalakrishnan, Eugene Demler, Jamir Marino","doi":"10.1038/s42005-025-02141-x","DOIUrl":"10.1038/s42005-025-02141-x","url":null,"abstract":"The Kondo effect is a prototypical strongly correlated phenomenon, and it is usually discussed in the context of unitary dynamics. Here, we demonstrate that the Kondo effect can be induced through non-linear dissipative channels, without requiring any coherent interaction on the impurity site. Specifically, we consider a reservoir of noninteracting fermions that can hop on a few impurity sites that are subjected to strong two-body losses. In the simplest case of a single lossy site, we recover the Anderson impurity model in the regime of infinite repulsion, with a small residual dissipation as a perturbation. While the Anderson model gives rise to the Kondo effect, this residual dissipation competes with it, offering an instance of a nonlinear dissipative impurity where the interplay between coherent and incoherent dynamics emerges from the same underlying physical process. We further outline how this dissipative engineering scheme can be extended to two or more lossy sites, realizing generalizations of the Kondo model with spin 1 or higher. Our results suggest alternative implementations of Kondo models using ultracold atoms in transport experiments, where localized dissipation can be naturally introduced, and the Kondo effect observed through conductance measurements.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":"8 1","pages":"212"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12098120/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144141605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aerosol size determination via light scattering of viruses and protein complexes. 通过病毒和蛋白质复合物的光散射测定气溶胶大小。

IF 5.4 1区物理与天体物理

Communications Physics Pub Date : 2025-01-01 Epub Date: 2025-04-12 DOI: 10.1038/s42005-025-02076-3

Lena Worbs, Tej Varma Yenupuri, Tong You, Filipe R N C Maia

{"title":"Aerosol size determination via light scattering of viruses and protein complexes.","authors":"Lena Worbs, Tej Varma Yenupuri, Tong You, Filipe R N C Maia","doi":"10.1038/s42005-025-02076-3","DOIUrl":"https://doi.org/10.1038/s42005-025-02076-3","url":null,"abstract":"The study of ultrafine particle aerosols, those with particle diameters of 100 nm or less, is important due to their impact on our health and environment. However, given their small sizes, such particles can be difficult to measure and trace. Most common optical methods are unable to reach this size range. Other methods exist but incur other limitations, such as the need for electrically charged particles. Here we show how light scattering can be used to detect and measure the size and location of single viruses and protein complexes forming an aerosol beam, as well as trace their path. We were able to detect individual particles down to 16 nm in diameter. The primary purpose of our instrument is to monitor the delivery of single bioparticles to the focus of an X-ray laser to image those particles, but it has the potential to study any other aerosols such as those resulting from ultrafine sea spray, with important consequences for cloud formation and climate modeling, or from combustion, responsible for most air pollution and resulting health impacts.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":"8 1","pages":"155"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11993359/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143984118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Suppressing nonperturbative gauge errors in the thermodynamic limit using local pseudogenerators. 利用局部伪发电机抑制热力学极限中的非微扰规整误差

IF 5.5 1区物理与天体物理

Communications Physics Pub Date : 2025-01-01 Epub Date: 2025-03-18 DOI: 10.1038/s42005-025-02035-y

Maarten Van Damme, Julius Mildenberger, Fabian Grusdt, Philipp Hauke, Jad C Halimeh

{"title":"Suppressing nonperturbative gauge errors in the thermodynamic limit using local pseudogenerators.","authors":"Maarten Van Damme, Julius Mildenberger, Fabian Grusdt, Philipp Hauke, Jad C Halimeh","doi":"10.1038/s42005-025-02035-y","DOIUrl":"10.1038/s42005-025-02035-y","url":null,"abstract":"With recent progress in quantum simulations of lattice-gauge theories, it is becoming a pressing question how to reliably protect the gauge symmetry that defines such models. Recently, an experimentally feasible gauge-protection scheme has been proposed that is based on the concept of a local pseudogenerator, which is required to act identically to the full gauge-symmetry generator in the target gauge sector, but not necessarily outside of it. The scheme has been analytically and numerically shown to reliably stabilize lattice gauge theories in the presence of perturbative errors on finite-size analog quantum-simulation devices. In this work, through uniform matrix product state calculations, we demonstrate the efficacy of this scheme for nonperturbative errors in analog quantum simulators up to all accessible evolution times in the thermodynamic limit, where it is a priori neither established nor expected that this scheme will succeed. Our results indicate the presence of an emergent gauge symmetry in an adjusted gauge theory even in the thermodynamic limit, which is beyond our analytic predictions. Additionally, we show through quantum circuit model calculations that gauge protection with local pseudogenerators also successfully suppresses gauge violations on finite quantum computers that discretize time through Trotterization. Our results firm up the robustness and feasibility of the local pseudogenerator as a viable tool for enforcing gauge invariance in modern quantum simulators and noisy intermediate-scale quantum devices.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":"8 1","pages":"106"},"PeriodicalIF":5.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11919730/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143669261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chaotic and quantum dynamics in driven-dissipative bosonic chains. 驱动耗散玻色子链中的混沌和量子动力学。

IF 5.8 1区物理与天体物理

Communications Physics Pub Date : 2025-01-01 Epub Date: 2025-10-16 DOI: 10.1038/s42005-025-02314-8

Filippo Ferrari, Fabrizio Minganti, Camille Aron, Vincenzo Savona

{"title":"Chaotic and quantum dynamics in driven-dissipative bosonic chains.","authors":"Filippo Ferrari, Fabrizio Minganti, Camille Aron, Vincenzo Savona","doi":"10.1038/s42005-025-02314-8","DOIUrl":"10.1038/s42005-025-02314-8","url":null,"abstract":"Thermalization in quantum many-body systems typically unfolds over timescales governed by intrinsic relaxation mechanisms. Yet, its spatial aspect is less understood. We investigate this phenomenon in the nonequilibrium steady state (NESS) of a Bose-Hubbard chain subject to coherent driving and dissipation at its boundaries, a setup inspired by current designs in circuit quantum electrodynamics. The dynamical fingerprints of chaos in this NESS are probed using semiclassical out-of-time-order correlators within the truncated Wigner approximation. At intermediate drive strengths, we uncover a two-stage thermalization along the spatial dimension: phase coherence is rapidly lost near the drive, while amplitude relaxation occurs over much longer distances. This separation of scales gives rise to an extended hydrodynamic regime exhibiting anomalous temperature profiles, which we designate as a \"prethermal\" domain. At stronger drives, the system enters a nonthermal, non-chaotic finite-momentum condensate characterized by sub-Poissonian photon statistics and a spatially modulated phase profile, whose stability is undermined by quantum fluctuations. We explore the conditions underlying this protracted thermalization in space and argue that similar mechanisms are likely to emerge in a broad class of extended driven-dissipative systems.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":"8 1","pages":"407"},"PeriodicalIF":5.8,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12532707/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145328373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrasound synthetic aperture non-line-of-sight imaging. 超声合成孔径非视距成像。

IF 5.8 1区物理与天体物理

Communications Physics Pub Date : 2025-01-01 Epub Date: 2025-11-17 DOI: 10.1038/s42005-025-02335-3

Tailin Li, Ilya Starshynov, Khaled Kassem, Zongliang Xie, Ge Ren, Yihan Luo, Daniele Faccio

{"title":"Ultrasound synthetic aperture non-line-of-sight imaging.","authors":"Tailin Li, Ilya Starshynov, Khaled Kassem, Zongliang Xie, Ge Ren, Yihan Luo, Daniele Faccio","doi":"10.1038/s42005-025-02335-3","DOIUrl":"10.1038/s42005-025-02335-3","url":null,"abstract":"Non-line-of-sight (NLOS) imaging typically relies on the use of ultrashort laser pulses and time-resolved detection to then reconstruct 3D environments that are hidden from the direct line-of-sight. However, the same scattering mechanism and wall-reflections that allow light to propagate into the hidden environment and back again ultimately limit both resolution and imaging distances even at high laser powers. Non-optical, such as acoustic and radio-wave approaches promise to solve some of these issues but have yet to achieve results comparable to optical systems. We present an ultrasound-based NLOS imaging system based on a scanning ultrasound emitter and receiver operating in a frequency range similar to common bats that demonstrates high-resolution 3D reconstruction of hidden scenes. We successfully image multiple targets and complex scenes with ~ cm depth resolution at distances up to 2 m away from the scattering surface. Measurements of the NLOS modulation transfer function quantify the spatial resolution to also be ~ 1 cm, which is comparable to traditional optical NLOS techniques.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":"8 1","pages":"432"},"PeriodicalIF":5.8,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12642816/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145602664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatial quantum-interference landscapes of multi-site-controlled quantum dots coupled to extended photonic cavity modes. 多点控制量子点耦合到扩展光子腔模式的空间量子干涉景观。

IF 5.4 1区物理与天体物理

Communications Physics Pub Date : 2025-01-01 Epub Date: 2025-04-11 DOI: 10.1038/s42005-025-02051-y

Jiahui Huang, Alessio Miranda, Wei Liu, Xiang Cheng, Benjamin Dwir, Alok Rudra, Kai-Chi Chang, Eli Kapon, Chee Wei Wong

{"title":"Spatial quantum-interference landscapes of multi-site-controlled quantum dots coupled to extended photonic cavity modes.","authors":"Jiahui Huang, Alessio Miranda, Wei Liu, Xiang Cheng, Benjamin Dwir, Alok Rudra, Kai-Chi Chang, Eli Kapon, Chee Wei Wong","doi":"10.1038/s42005-025-02051-y","DOIUrl":"https://doi.org/10.1038/s42005-025-02051-y","url":null,"abstract":"A compact platform to integrate emitters in a cavity-like support is to embed quantum dots (QDs) in a photonic crystal (PhC) structure, making them promising candidates for integrated quantum photonic circuits. The emission properties of QDs can be modified by tailored photonic structures, relying on the Purcell effect or strong light-matter interactions. However, the effects of photonic states on spatial features of exciton emissions in these systems are rarely explored. Such effect is difficult to access due to random positions of self-assembled QDs in PhC structures, and the fact that quantum well excitons' wavefunctions resemble photonic states in a conventional distributed Bragg reflector cavity system. In this work, we instead observe a spatial signature of exciton emission using site-controlled QDs embedded in PhC cavities. In particular, we observe the detuning-dependent spatial repulsion of the QD exciton emissions by polarized imaging of the micro-photoluminescence, dependent on the controlled QD's position in a spatially extended photonic pattern. The observed effect arises due to the quantum interference between QD decay channel in a spatially-extended cavity mode. Our findings suggest that integration of site-controlled QDs in tailored photonic structures can enable spatially distributed single-photon sources and photon switches.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":"8 1","pages":"152"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11991910/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143966574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mesoscopic insights into effects of electric field on pool boiling for leaky dielectric fluids. 电场对漏电介质池沸腾影响的介观研究。

IF 5.4 1区物理与天体物理

Communications Physics Pub Date : 2025-01-01 Epub Date: 2025-04-30 DOI: 10.1038/s42005-025-02102-4

Geng Wang, Junyu Yang, Timan Lei, Linlin Fei, Xiao Zhao, Jianfu Zhao, Kai Li, Kai H Luo

{"title":"Mesoscopic insights into effects of electric field on pool boiling for leaky dielectric fluids.","authors":"Geng Wang, Junyu Yang, Timan Lei, Linlin Fei, Xiao Zhao, Jianfu Zhao, Kai Li, Kai H Luo","doi":"10.1038/s42005-025-02102-4","DOIUrl":"https://doi.org/10.1038/s42005-025-02102-4","url":null,"abstract":"The electric field is known as an effective approach to improving pool boiling. However, there has been limited research on electric field-enhanced boiling of leaky dielectric fluids and the associated bubble dynamics. In this work, we employ a mesoscopic multiphase lattice Boltzmann method to perform large-scale three-dimensional simulations of electric field-enhanced pool boiling in leaky dielectric fluids. Our findings confirm that, compared to conventional pool boiling, electric field-enhanced pool boiling significantly increases heat transfer efficiency in the transition boiling regime. Furthermore, we propose a theoretical model based on the hydrodynamic theory that accurately predicts the heat flux across a wide range of operating parameters. Finally, we reveal size effects of the electric force on nucleation sites and rising bubbles, explaining the contrasting phenomena of bubble suppression and enhanced bubble detachment observed in electric field-enhanced boiling. The results of this study provide theoretical insight for optimizing phase‑change heat transfer efficiency.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":"8 1","pages":"188"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12043509/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143954623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Diverse dynamics in interacting vortices systems through tunable conservative and non-conservative coupling strengths. 通过可调的保守和非保守耦合强度，相互作用的涡旋系统的多种动力学。

IF 5.4 1区物理与天体物理

Communications Physics Pub Date : 2025-01-01 Epub Date: 2025-03-01 DOI: 10.1038/s42005-025-02006-3

Alexandre Abbass Hamadeh, Abbas Koujok, Davi R Rodrigues, Alejandro Riveros, Vitaliy Lomakin, Giovanni Finocchio, Grégoire De Loubens, Olivier Klein, Philipp Pirro

{"title":"Diverse dynamics in interacting vortices systems through tunable conservative and non-conservative coupling strengths.","authors":"Alexandre Abbass Hamadeh, Abbas Koujok, Davi R Rodrigues, Alejandro Riveros, Vitaliy Lomakin, Giovanni Finocchio, Grégoire De Loubens, Olivier Klein, Philipp Pirro","doi":"10.1038/s42005-025-02006-3","DOIUrl":"10.1038/s42005-025-02006-3","url":null,"abstract":"Magnetic vortices are highly tunable, nonlinear systems with ideal properties for being applied in spin wave emission, data storage, and neuromorphic computing. However, their technological application is impaired by a limited understanding of non-conservative forces, that results in the open challenge of attaining precise control over vortex dynamics in coupled vortex systems. Here, we present an analytical model for the gyrotropic dynamics of coupled magnetic vortices within nano-pillar structures, revealing how conservative and non-conservative forces dictate their complex behavior. Validated by micromagnetic simulations, our model accurately predicts dynamic states, controllable through external current and magnetic field adjustments. The experimental verification in a fabricated nano-pillar device aligns with our predictions, and it showcases the system's adaptability in dynamical coupling. The unique dynamical states, combined with the system's tunability and inherent memory, make it an exemplary foundation for reservoir computing. This positions our discovery at the forefront of utilizing magnetic vortex dynamics for innovative computing solutions, marking a leap towards efficient data processing technologies.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":"8 1","pages":"85"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11872732/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143556085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Contrasting c-axis and in-plane uniaxial stress effects on superconductivity and stripe order in La_1.885Ba_0.115CuO₄. 对比c轴和面内单轴应力对La1.885Ba0.115CuO4超导性和条纹序的影响

IF 5.4 1区物理与天体物理

Communications Physics Pub Date : 2025-01-01 Epub Date: 2025-07-11 DOI: 10.1038/s42005-025-02215-w

Shams Sohel Islam, Vahid Sazgari, Jennifer N Graham, Orion Gerguri, Petr Král, Ikuya Maetsu, Hrishikesh Gopakumar, Markus Müller, Rajib Sarkar, Vadim Grinenko, Gediminas Simutis, Toni Shiroka, Rustem Khasanov, Marc Janoschek, John M Tranquada, Hans Henning Klauss, Tadashi Adachi, Hubertus Luetkens, Zurab Guguchia

{"title":"Contrasting c-axis and in-plane uniaxial stress effects on superconductivity and stripe order in La1.885Ba0.115CuO4.","authors":"Shams Sohel Islam, Vahid Sazgari, Jennifer N Graham, Orion Gerguri, Petr Král, Ikuya Maetsu, Hrishikesh Gopakumar, Markus Müller, Rajib Sarkar, Vadim Grinenko, Gediminas Simutis, Toni Shiroka, Rustem Khasanov, Marc Janoschek, John M Tranquada, Hans Henning Klauss, Tadashi Adachi, Hubertus Luetkens, Zurab Guguchia","doi":"10.1038/s42005-025-02215-w","DOIUrl":"10.1038/s42005-025-02215-w","url":null,"abstract":"The cuprate superconductor La2-x Ba x CuO4 (LBCO) near x = 0.125 is a striking example of intertwined electronic orders, where 3D superconductivity is anomalously suppressed, allowing spin and charge stripe order to develop. Understanding this interplay remains a key challenge in cuprates, highlighting the necessity of external tuning for deeper insight. While in-plane uniaxial stress enhances superconductivity and suppresses stripe order, the effects of c-axis compression remains largely unexplored. Here, we use muon spin rotation (μSR) and AC susceptibility with an in situ piezoelectric stress device to investigate the spin-stripe order and superconductivity in LBCO-0.115 under c-axis compression. The measurements reveal a gradual suppression of the superconducting transition temperature (T c) with increasing c-axis stress, in stark contrast to the strong enhancement observed under in-plane stress. We further show that while in-plane stress rapidly reduces both the magnetic volume fraction (V m) and the spin-stripe ordering temperature (T so), c-axis compression has no effect, with V m and T so exhibiting an almost unchanged behavior up to the highest applied stress of 0.21 GPa. These findings demonstrate a strong anisotropy in stress response.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":"8 1","pages":"291"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12254039/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144625504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fast gradient-free optimization of excitations in variational quantum eigensolvers. 变分量子特征解中激励的快速无梯度优化。

IF 5.8 1区物理与天体物理

Communications Physics Pub Date : 2025-01-01 Epub Date: 2025-10-30 DOI: 10.1038/s42005-025-02375-9

Jonas Jäger, Thierry N Kaldenbach, Max Haas, Erik Schultheis

{"title":"Fast gradient-free optimization of excitations in variational quantum eigensolvers.","authors":"Jonas Jäger, Thierry N Kaldenbach, Max Haas, Erik Schultheis","doi":"10.1038/s42005-025-02375-9","DOIUrl":"10.1038/s42005-025-02375-9","url":null,"abstract":"Finding molecular ground states and energies with variational quantum eigensolvers is central to chemistry applications on quantum computers. Physically motivated ansätze based on excitation operators respect physical symmetries, but existing quantum-aware optimizers, such as Rotosolve, have been limited to simpler operator types. To fill this gap, we introduce ExcitationSolve, a fast quantum-aware optimizer that is globally-informed, gradient-free, and hyperparameter-free. ExcitationSolve extends these optimizers to parameterized unitaries with generators G of the form G 3 = G exhibited by excitation operators in approaches such as unitary coupled cluster. ExcitationSolve determines the global optimum along each variational parameter using the same quantum resources that gradient-based optimizers require for one update step. We provide optimization strategies for both fixed and adaptive variational ansätze, along with generalizations for simultaneously selecting and optimizing multiple excitations. On molecular ground state energy benchmarks, ExcitationSolve outperforms state-of-the-art optimizers by converging faster, achieving chemical accuracy for equilibrium geometries in a single parameter sweep, yielding shallower adaptive ansätze and remaining robust to real hardware noise. By uniting physical insight with efficient optimization, ExcitationSolve paves the way for scalable quantum chemistry calculations.","PeriodicalId":10540,"journal":{"name":"Communications Physics","volume":"8 1","pages":"418"},"PeriodicalIF":5.8,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12576945/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145430560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0