Exciton-polariton ring Josephson junction by Nina Voronova, Anna Grudinina, Riccardo Panico, Dimitris Trypogeorgos, Milena De Giorgi, Kirk Baldwin, Loren Pfeiffer, Daniele Sanvitto, Dario Ballarini

“…Abstract Macroscopic coherence in quantum fluids allows the observation of interference effects in their wavefunctions, and enables applications such as superconducting quantum interference devices based on Josephson tunneling. …”
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Fast electrons produced by lower hybrid wave and effects on plasma–wall interactions by Hailong Lu, Nong Xiang, Zehua Qian, Hua Yang, Miaohui Li, Manni Jia, Gen Li, Zechen Wang, Changhao Deng, Jinjin Lu, Jiamin Long

“…Lower hybrid wave (LHW) current drive plays a crucial role in sustaining steady-state (SS) discharges on the Experimental Advanced Superconducting Tokamak (EAST). Hotspots frequently form on the wave antenna and guard limiters during SS operations. …”
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Design and Simulation of an Antenna-Coupled Microbolometer at 30 THz by Angel Colin, Eduardo Pérez-Tijerina, Francisco Solis-Pomar

“…The microbolometer is modeled with superconducting niobium, all together on a silicon nitride membrane. …”
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Beyond sensitivity: what are the enabling opportunities of OPM-MEG? by Timothy P. L. Roberts, Timothy P. L. Roberts, Charlotte Birnbaum, Luke Bloy, William Gaetz, William Gaetz

“…While optically-pumped magnetometer (OPM) technology offers a number of compelling advantages over its SQUID predecessor for magnetoencephalography (MEG), many studies and viewpoints focus on issues of (i) scalp placement, with commensurate increases in sensitivity to weak magnetic fields and (ii) room temperature operation (without the need for baths of liquid helium to maintain superconducting properties of SQUIDs). This article addresses another unique and tantalizing opportunity—the ability for the OPM array to be “wearable”, and thus to move with the participant. …”
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Deterministic multi-phonon entanglement between two mechanical resonators on separate substrates by Ming-Han Chou, Hong Qiao, Haoxiong Yan, Gustav Andersson, Christopher R. Conner, Joel Grebel, Yash J. Joshi, Jacob M. Miller, Rhys G. Povey, Xuntao Wu, Andrew N. Cleland

“…Here, we demonstrate rapid multi-phonon entanglement generation and subsequent tomographic analysis, using a scalable platform comprising two surface acoustic wave resonators on separate substrates, each connected to a superconducting qubit. We synthesize a mechanical Bell state with a fidelity of $${{{{\mathcal{F}}}}}=0.872\pm 0.002$$ F = 0.872 ± 0.002 , and a multi-phonon entangled N = 2 N00N state with a fidelity of $${{{{\mathcal{F}}}}}=0.748\pm 0.008$$ F = 0.748 ± 0.008 . …”
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Direct observation of chiral edge current at zero magnetic field in a magnetic topological insulator by Jinjiang Zhu, Yang Feng, Xiaodong Zhou, Yongchao Wang, Hongxu Yao, Zichen Lian, Weiyan Lin, Qiushi He, Yishi Lin, Youfang Wang, Yongqian Wang, Shuai Yang, Hao Li, Yang Wu, Chang Liu, Jing Wang, Jian Shen, Jinsong Zhang, Yayu Wang, Yihua Wang

“…Here, we perform scanning superconducting quantum interference device (sSQUID) microscopy on these seemingly failed QAH insulators to image their current distribution. …”
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Nonlocal Quantum Effects in Cosmology by Yurii V. Dumin

“…We try to answer this question by utilizing the results of a few experiments, namely, with the superconducting multi-Josephson-junction loops and the ultracold gases in periodic potentials. …”
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Recovering Quantum Coherence of a Cavity Qubit Coupled to a Noisy Ancilla through Real-Time Feedback by Uri Goldblatt, Nitzan Kahn, Sergey Hazanov, Ofir Milul, Barkay Guttel, Lalit M. Joshi, Daniel Chausovsky, Fabien Lafont, Serge Rosenblum

“…In this work, we uncover the intricate dynamics of decoherence in a superconducting cavity qubit due to its interaction with a noisy transmon ancilla. …”
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Benchmarking Quantum Circuit Transformation With QKNOB Circuits by Sanjiang Li, Xiangzhen Zhou, Yuan Feng

“…Current superconducting quantum devices impose strict connectivity constraints on quantum circuit execution, necessitating circuit transformation before executing quantum circuits on physical hardware. …”
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SmBa2NbO6 Nanopowders, an Effective Percolation Network Medium for YBCO Superconductors by S. Vidya, K. C. Mathai, P. P. Rejith, Sam Solomon, J. K. Thomas

“…The chemical nonreactivity of nano SmBa2NbO6 with YBCO is evident from the X-Ray diffraction study which makes it a suitable nanoceramic substrate material for high temperature superconducting films. A systematic increase in the sintered density, approaching the optimum value of the insulating nanophase is clearly observed, as the vol.% of YBCO in the composite decreases. …”
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Entangling Schrödinger’s cat states by bridging discrete- and continuous-variable encoding by Daisuke Hoshi, Toshiaki Nagase, Sangil Kwon, Daisuke Iyama, Takahiko Kamiya, Shiori Fujii, Hiroto Mukai, Shahnawaz Ahmed, Anton Frisk Kockum, Shohei Watabe, Fumiki Yoshihara, Jaw-Shen Tsai

“…Here, we show that such a DV–CV hybrid approach, applied to superconducting Kerr parametric oscillators (KPOs), enables us to entangle a pair of Schrödinger’s cat states by two methods. …”
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First-order phase transition of the Schwinger model with a quantum computer by Takis Angelides, Pranay Naredi, Arianna Crippa, Karl Jansen, Stefan Kühn, Ivano Tavernelli, Derek S. Wang

“…The states obtained by the classical simulation are then prepared on the IBM’s superconducting quantum hardware. Applying state-of-the art error-mitigation methods, we show that the electric field density and particle number, observables which reveal the phase structure of the model, can be reliably obtained from the quantum hardware. …”
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Bosonic Spectral Function and the Electron-Phonon Interaction in HTSC Cuprates by E. G. Maksimov, M. L. Kulić, O. V. Dolgov

“…In this paper we discuss experimental evidence related to the structure and origin of the bosonic spectral function 𝛼2𝐹(𝜔) in high-temperature superconducting (HTSC) cuprates at and near optimal doping. …”
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Comparative study of quantum error correction strategies for the heavy-hexagonal lattice by César Benito, Esperanza López, Borja Peropadre, Alejandro Bermudez

“…In this work, we make a comparative study of possible strategies to overcome this limitation for the heavy-hexagonal lattice, the architecture of current IBM superconducting quantum computers. We explore two complementary strategies: the search for an efficient embedding of the surface code into the heavy-hexagonal lattice, as well as the use of codes whose connectivity requirements are naturally tailored to this architecture, such as subsystem-type and Floquet codes. …”
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Fault-Tolerant Quantum Computation by Hybrid Qubits with Bosonic Cat Code and Single Photons by Jaehak Lee, Nuri Kang, Seok-Hyung Lee, Hyunseok Jeong, Liang Jiang, Seung-Woo Lee

“…We discuss the realization of our approach not only in all-photonic platforms but also in other hybrid platforms including superconducting and trapped-ion systems, which allows us to find various efficient routes toward fault-tolerant quantum computing.…”
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Crystalline-symmetry-protected Majorana modes in coupled quantum dots by Bradraj Pandey, Gonzalo Alvarez, Elbio Dagotto, Rui-Xing Zhang

“…Joining two π junctions into a closed loop, we can simulate two distinct classes of two-dimensional higher-order topological superconducting phases, both carrying symmetry-protected Majorana modes around the sample corners. …”
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Optimizing Circuit Reusing and its Application in Randomized Benchmarking by Zhuo Chen, Guoding Liu, Xiongfeng Ma

“…We further conduct experiments on a superconducting platform, revealing a non-linear relationship between $R$ and the cost, contradicting previous assumptions in the literature. …”
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Degeneracy-breaking and long-lived multimode microwave electromechanical systems enabled by cubic silicon-carbide membrane crystals by Yulong Liu, Huanying Sun, Qichun Liu, Haihua Wu, Mika A. Sillanpää, Tiefu Li

“…The 3C-SiC material demonstrates excellent microwave compatibility with superconducting circuits. Thus, we can establish a coherent electromechanical interface, enabling precise control over 21 high-Q mechanical modes from a single 3C-SiC square membrane. …”
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Effect of Strong Magnetic Field on Competing Order Parameters in Two-Flavor Dense Quark Matter by Tanumoy Mandal, Prashanth Jaikumar

“…In the weak magnetic field limit, our results agree qualitatively with earlier zero-field studies in the literature that find a critical coupling ratio GD/GS~1.1 below which chiral or superconducting order parameters appear almost exclusively. …”
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Anomalous coherence length in superconductors with quantum metric by Jin-Xin Hu, Shuai A. Chen, K. T. Law

“…Lastly, we compute the quantum metric contributions for the family of superconducting moiré graphene materials, demonstrating the significant role played by quantum metric effects in these narrow-band superconductors.…”
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