Franziska Martens, Wei Qiu, Ola Jakobsson, Christian Cierpka, Andreas Ehn, Per Augustsson
{"title":"Configurable thermoacoustic streaming by laser-induced temperature gradients.","authors":"Franziska Martens, Wei Qiu, Ola Jakobsson, Christian Cierpka, Andreas Ehn, Per Augustsson","doi":"10.1103/physrevapplied.23.024043","DOIUrl":"10.1103/physrevapplied.23.024043","url":null,"abstract":"<p><p>mControlling the streaming flow in acoustically actuated microchannels enables the targeted motion of suspended micro-objects. This can offer novel approaches for rare cell studies or cell sorting in medicine or basic biology. In this work, we utilize the temperature dependence of the acoustic body force, which originates from the interaction of an acoustic field with gradients in compressibility or density. A temperature gradient was optically induced inside an acoustofluidic microchannel by the absorption of light and the resulting streaming flow was measured by particle tracking in three dimensions. Inside a microfluidic channel, two different thermal fields were investigated for a fixed sound field, both in experiments and in simulations. The results show that shifting the location of the heat source from the center to the side of the channel leads to a transition from four streaming rolls to two rolls in the plane normal to the laser incidence. By modulating the optical absorbance of the medium, the streaming velocity can be tuned such that higher absorption leads to faster thermoacoustic streaming. Further, for higher absorbance, we observe increasing velocity components in the direction of the laser due to asymmetric heat generation along the beam.</p>","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"23 2","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7618173/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145186522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Enrico Corato, Ola Jakobsson, Wei Qiu, Takeshi Morita, Per Augustsson
{"title":"High-energy-density acoustofluidic device using a double-parabolic ultrasonic transducer.","authors":"Enrico Corato, Ola Jakobsson, Wei Qiu, Takeshi Morita, Per Augustsson","doi":"10.1103/physrevapplied.23.024031","DOIUrl":"10.1103/physrevapplied.23.024031","url":null,"abstract":"<p><p>High-acoustic-energy-density acoustofluidic devices are necessary to make this technology a viable option for clinical applications in the biomedical field. We present a mechanical interface that enables delivery of a high-amplitude acoustic field inside a fluid cavity by translating the vibrations from two large piezoelectric elements into a microfluidic chip. The study comprises both experimental characterization of a double-parabolic metallic acoustic waveguide and simulations of its working mechanism in two dimensions. We could focus 4.9-μm polystyrene particles at a flowrate of 5 ml/min, corresponding to an average retention time of 13.5 ms for particles in the actuated area. Moreover, we measured the acoustic energy density in the channel at stopped-flow condition, obtaining an average value of 1207 J<i>/</i>m<sup>3</sup> and a maximum value of 2977 J<i>/</i>m<sup>3</sup> with an input electrical power of 1.5 W. By comparing the simulation results with laser-Doppler vibrometer measurements, we confirmed that transverse sound waves play a significant role in the working mechanism of the double-parabolic structure, thus paving the way for further future optimization of the waveguide design.</p>","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"23 2","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7618166/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145150444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
{"title":"Nonreciprocity of surface acoustic waves coupled to spin waves in a ferromagnetic bilayer with noncollinear layer magnetizations","authors":"Lidiia Ushii, Andrei Slavin, Roman Verba","doi":"10.1103/physrevapplied.22.034046","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.034046","url":null,"abstract":"Nonreciprocity of propagation of surface acoustic waves (SAWs) in the microwave frequency band can be achieved using the magnetoelastic interaction of SAWs with spin waves (SWs) propagating in magnetic heterostructures. Recent works have shown that the ultimate isolation of a counterpropagating hybridized SAW/SW is achieved in heterostructures consisting of a synthetic antiferromagnet—a ferromagnetic (FM) bilayer with antiferromagnetic Ruderman-Kittel-Kasuya-Yosida interlayer coupling—placed on top of a piezoelectric acoustic waveguide. In this work, we study in detail a more practical and technologically simpler system based on an FM bilayer, where layers are coupled by only dipole-dipole interaction, and having noncollinear magnetizations of the FM layers. A weak in-plane anisotropy with noncollinear easy axes in the layers is shown to be the only essential factor for the realization of strongly nonreciprocal propagation of a hybridized SAW/SW. We formulate requirements for the relative orientation of the layer’s magnetizations and wave propagation direction necessary to realize an efficient SAW isolator, and demonstrate examples of SAW transmission characteristics which prove the possibility of achieving an isolation exceeding 50 dB for a submillimeter-long FM bilayer with insertion losses of just a few decibels more than those of a pure SAW device. In addition to relative fabrication simplicity, the proposed magnetoelastic heterostructure exhibits a reasonable robustness in respect to deviations in the anisotropy axes and/or bias field directions—an important benefit for device mass production.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"197 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248047","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}
{"title":"Experimental demonstration of deep-learning-enabled adaptive optics","authors":"Hao-Bin Fu, Zu-Yang Wan, Yu-huai Li, Bo Li, Zhen Rong, Gao-Qiang Wang, Juan Yin, Ji-Gang Ren, Wei-Yue Liu, Sheng-Kai Liao, Yuan Cao, Cheng-Zhi Peng","doi":"10.1103/physrevapplied.22.034047","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.034047","url":null,"abstract":"Satellite-based quantum communication is a promising approach for establishing global-scale quantum networks. In free-space quantum channels, single-mode-fiber coupling plays a crucial role in increasing the signal-to-noise ratio of daylight quantum key distribution (QKD) and ensuring compatibility with standard fiber-based QKD protocols. However, consistently achieving high efficiency and stable single-mode-fiber coupling under strong atmospheric turbulence remains an ongoing experimental challenge. In this study, we experimentally demonstrate an adaptive method based on convolutional neural networks capable of directly estimating phase information from a single defocused image. We developed a convolutional neural network to establish the relationship between intensity distribution and phase information of turbulent distortions. We demonstrate the real-time performance of our deep-learning adaptive method in increasing single-mode-fiber coupling efficiency across various turbulence scales and quantify turbulence frequencies. Notably, the method proved highly effective in strong-turbulence scenarios, with frequencies reaching up to 200 Hz, leading to a significant increase in single-mode-fiber coupling efficiency. We demonstrate the corrective capability of our adaptive method for strong turbulence, enabled by the generalization of the convolutional neural network. Our results offer an efficient solution for daytime free-space QKD applications.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"37 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248061","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}
{"title":"Static quantum dot on a large potential hilltop for generating and analyzing hot electrons in the quantum Hall regime","authors":"Ryo Oishi, Yuto Hongu, Tokuro Hata, Chaojing Lin, Takafumi Akiho, Koji Muraki, Toshimasa Fujisawa","doi":"10.1103/physrevapplied.22.034043","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.034043","url":null,"abstract":"We propose and demonstrate a static quantum dot on a potential hilltop to generate and analyze ballistic hot electrons along a quantum Hall edge channel well above the chemical potential. High-energy resolution associated with discrete energy levels is attractive for studying hot-electron dynamics. In particular, the energy distribution function of hot electrons weakly coupled to cold electrons is investigated to reveal spectral diffusion with energy relaxation. The analysis allows us to estimate the maximum energy exchange per scattering, which is a key parameter to describe interacting electrons in the edge channel.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"53 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248048","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}
{"title":"Power-stabilized 3-W blue laser locked to the 420-nm transition in rubidium","authors":"Jia Zhang, Xiaolei Guan, Xun Gao, Zhiyang Wang, Xiaomin Qin, Zijie Liu, Hangbo Shi, Jianxiang Miao, Tiantian Shi, Jingbiao Chen","doi":"10.1103/physrevapplied.22.034045","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.034045","url":null,"abstract":"Using modulation transfer spectroscopy, we achieve the frequency stabilization of a high-power 3-W blue laser at the wavelength of 420 nm to the <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>Rb</mi></math> <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mn>5</mn><msub><mi>S</mi><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msub></math>–<math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mn>6</mn><msub><mi>P</mi><mrow><mn>3</mn><mo>/</mo><mn>2</mn></mrow></msub></math> transition. The in-loop frequency stability of this laser is <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mn>1.8</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>11</mn></mrow></msup><mo>/</mo><msqrt><mi>τ</mi></msqrt></math>, reaching <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mn>1.7</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>12</mn></mrow></msup></math> at 100 s and <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mn>7</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>13</mn></mrow></msup></math> at 1000 s. An external power feedback loop is established using an acousto-optic modulator, employing the zeroth-order diffracted light for power stabilization, achieving an in-loop power stability of <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mn>1.0</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>6</mn></mrow></msup></math> at 1 s. Moreover, the continuous mode-hop free interval of this high-power laser can simultaneously cover the <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mn>5</mn><msub><mi>S</mi><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msub></math>–<math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mn>6</mn><msub><mi>P</mi><mrow><mn>3</mn><mo>/</mo><mn>2</mn></mrow></msub></math> transitions of <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msup><mi></mi><mn>85</mn></msup><mtext>Rb</mtext></math> and <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msup><mi></mi><mn>87</mn></msup><mtext>Rb</mtext></math>, with successful locking achieved for both isotopes, providing a comprehensive analysis of the <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>Rb</mi></math> atomic transitions in the blue spectral region. As an application, this 3-W 420-nm laser with excellent power and frequency stabilities is used as a repumping source for diffuse laser cooling of <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msup><mi></mi><mn>87</mn></msup><mtext>Rb</mtext></math> atoms, realizing a one-meter-long cold-atom cloud. This paves the way for using blue-light cooling to realize a cold-<math disp","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"11 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248012","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}
M.A. Wolfe, Brighton X. Coe, Justin S. Edwards, Tyler J. Kovach, Thomas McJunkin, Benjamin Harpt, D.E. Savage, M.G. Lagally, R. McDermott, Mark Friesen, Shimon Kolkowitz, M.A. Eriksson
{"title":"Control of threshold voltages in Si/Si0.7Ge0.3 quantum devices via optical illumination","authors":"M.A. Wolfe, Brighton X. Coe, Justin S. Edwards, Tyler J. Kovach, Thomas McJunkin, Benjamin Harpt, D.E. Savage, M.G. Lagally, R. McDermott, Mark Friesen, Shimon Kolkowitz, M.A. Eriksson","doi":"10.1103/physrevapplied.22.034044","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.034044","url":null,"abstract":"Optical illumination of quantum dot qubit devices at cryogenic temperatures, while not well studied, is often used to recover operating conditions after undesired shocking events or charge injection. Here, we demonstrate systematic threshold-voltage shifts in a dopant-free <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>Si</mi></math>/<math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>Si</mi></math><math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi></mi><mrow><mn>0.7</mn></mrow></msub></math><math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>Ge</mi></math><math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi></mi><mrow><mn>0.3</mn></mrow></msub></math> field-effect transistor using a near-infrared (780-nm) laser diode. We find that illumination under an applied gate voltage can be used to set a specific, stable, and reproducible threshold voltage that, over a wide range in gate bias, is equal to that gate bias. Outside this range, the threshold voltage can still be tuned, although the resulting threshold voltage is no longer equal to the applied gate bias during illumination. We present a simple and intuitive model that provides a mechanism for the tunability in the gate bias. The model presented also explains why cryogenic illumination is successful at resetting quantum dot qubit devices after undesired charging events.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"51 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248013","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}
{"title":"Optically accelerated extreme learning machine using hot atomic vapors","authors":"Pierre Azam, Robin Kaiser","doi":"10.1103/physrevapplied.22.034041","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.034041","url":null,"abstract":"Machine learning is becoming a widely used technique with impressive growth due to the diversity of problems of societal interest for which it can offer practical solutions. This increase of applications and required resources start to become limited by present-day hardware technologies. Indeed, novel machine learning subjects such as large language models or high-resolution image recognition raise the question of large computing time and energy cost of the required computation. In this context, optical platforms have been designed for several years with the goal of developing more efficient hardware for machine learning. Among different explored platforms, optical free-space propagation offers various advantages: parallelism, low energy cost, and computational speed. Here, we present a new design combining the strong and tunable nonlinear properties of a light beam propagating through a hot atomic vapor with an extreme learning machine model. We numerically and experimentally demonstrate the enhancement of the training using such free-space nonlinear propagation on an MNIST image classification task. We point out different experimental hyperparameters that can be further optimized to improve the accuracy of the platform.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"65 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248014","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}
Chengyuan Cai, Zubiao Zhang, Ji Zou, Gerrit E. W. Bauer, Tao Yu
{"title":"Spin-orbit-locked coupling of localized microwaves to magnons","authors":"Chengyuan Cai, Zubiao Zhang, Ji Zou, Gerrit E. W. Bauer, Tao Yu","doi":"10.1103/physrevapplied.22.034042","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.034042","url":null,"abstract":"We address the photonic spin-orbit coupling known from nano-optics and plasmonics in the microwave regime. The spin <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi mathvariant=\"bold\">S</mi></mrow></math> and momentum <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi mathvariant=\"bold\">q</mi></mrow></math> of microwaves emitted by an excited magnetic particle are locked by <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi mathvariant=\"bold\">q</mi></mrow><mo>⋅</mo><mrow><mi mathvariant=\"bold\">S</mi></mrow><mo>=</mo><mn>0</mn></math> with a fixed chirality <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mover><mrow><mi mathvariant=\"bold\">n</mi></mrow><mo stretchy=\"false\">^</mo></mover></mrow><mo>⋅</mo><mo stretchy=\"false\">(</mo><mrow><mover><mi mathvariant=\"bold\">S</mi><mo stretchy=\"false\">^</mo></mover></mrow><mo>×</mo><mrow><mover><mi mathvariant=\"bold\">q</mi><mo stretchy=\"false\">^</mo></mover></mrow><mo stretchy=\"false\">)</mo><mo>=</mo><mn>1</mn></math> when evanescent along <math display=\"inline\" overflow=\"scroll\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mover><mrow><mi mathvariant=\"bold\">n</mi></mrow><mo stretchy=\"false\">^</mo></mover></mrow><mo>⊥</mo><mrow><mi mathvariant=\"bold\">q</mi></mrow></math>. This field excites magnons in a nearby magnetic film in the form of directional beams that rotate with the magnetization direction. The exchange of these magnons between two distant nanomagnets leads to a highly tunable strong coupling and entangles their excited states.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"54 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248052","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}
Lautaro Labarca, Othmane Benhayoune-Khadraoui, Alexandre Blais, Adrian Parra-Rodriguez
{"title":"Toolbox for nonreciprocal dispersive models in circuit quantum electrodynamics","authors":"Lautaro Labarca, Othmane Benhayoune-Khadraoui, Alexandre Blais, Adrian Parra-Rodriguez","doi":"10.1103/physrevapplied.22.034038","DOIUrl":"https://doi.org/10.1103/physrevapplied.22.034038","url":null,"abstract":"We provide a systematic method for constructing effective dispersive Lindblad master equations to describe weakly anharmonic superconducting circuits coupled by a generic dissipationless nonreciprocal linear system, with effective coupling parameters and decay rates written in terms of the immittance parameters characterizing the coupler. This article extends the foundational work of Solgun <i>et al.</i> [IEEE Trans. Microw. Theory Techn. 67, 928 (2019)] for linear reciprocal couplers described by an impedance response. Notably, we expand the existing toolbox to incorporate nonreciprocal elements, account for direct stray coupling between immittance ports, circumvent potential singularities, and include collective dissipative effects that arise from interactions with external common environments. We illustrate the use of our results with a circuit of weakly anharmonic Josephson junctions coupled to a multiport nonreciprocal environment and a dissipative port. The results obtained here can be used for the design of complex superconducting quantum processors with nontrivial routing of quantum information, as well as analog quantum simulators of condensed matter systems.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"14 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248054","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}