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๐Ÿ” john gardner ๐Ÿ“‚ Physics
Showing 7007 results for "john gardner" in Physics
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Strong coupling between quantized magnon modes in a YIG microstucture and microwaves in a superconducting resonator

Seth W. Kurfman, Philipp Geyer, Anoop Kamalasanan, Karl Heimrich, Kwangyul Hu, Paul Tharnier, Frank Heyroth, Michael Flatte, Georg Schmidt ยท 2026

Strong-coupling experiments based on magnons enable the exploration into on-chip demonstrations involving numerous long-lived excitations. Yttrium iron garnet (YIG) has been considered for decades as โ€ฆ

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Quantum Magnetometry with Orientation beyond Steady-State Limits in Cavity-Magnon Systems

Zheng Liu, Ding-hui Xu, Yi-jia Yang, Chang-shui Yu ยท 2026

We present a transient quantum sensing framework for cavity-magnon systems that circumvents the inevitable loss of initial-state quantum properties plaguing conventional steady-state protocols. Explicโ€ฆ

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A Magnetically Switchable Bifocal Metasurface

Alberto Santonocito, Barbara Patrizi, Alessio Gabbani, Francesco Pineider, Guido Toci ยท 2026

Tunable flat optics are essential for advancing compact photonic devices. Here we show a numerical study of a reflective magneto-optical metasurface with a dynamically tunable focal length. The structโ€ฆ

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Superconductivity-Enabled Conversion of Ferromagnetic Resonance into Standing Spin Waves

Ya. V. Turkin, N. G. Pugach, F. M. Maksimov, A. S. Pakhomov, A. I. Chernov, V. I. Belotelov, S. N. Polulyakh, V. S. Stolyarov ยท 2026

Superconductors can transport spin without Joule dissipation, yet their coherent coupling to short-wavelength magnons in insulating magnets remains largely unexplored. Here we demonstrate experimentalโ€ฆ

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Status of the KM3NeT real-time analysis framework

Martina Marconi (on behalf of the KM3NeT Collaboration) ยท 2026

Multi-messenger astronomy requires real-time systems capable of rapidly responding to external alerts and sharing significant detections with partner observatories. KM3NeT, a deep-sea Cherenkov neutriโ€ฆ

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Accelerating finite-element-based projector augmented-wave density functional theory calculations with scalable GPU-centric computational methods

Kartick Ramakrishnan, Phani Motamarri ยท 2026

Accurate large-scale Kohn-Sham density functional theory (DFT) calculations are essential for modeling complex material systems, including interfaces, defects, nanoclusters, and twisted two-dimensionaโ€ฆ

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Substitutional platinum as an efficient nonradiative recombination center in silicon

Zhenxing Dai, Menglin Huang, Xin-Gao Gong, Shiyou Chen ยท 2026

Platinum (Pt) is widely used for carrier-lifetime control in silicon power devices, yet the microscopic nonradiative recombination mechanism of the substitutional platinum ($\text{Pt}_\text{Si}$) dopaโ€ฆ

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High-field magneto-optical imaging of superconducting critical states beyond 10 T using a paramagnetic garnet sensor

Yuto Kinoshita, Masayuki Toyoda, Yoshiaki Kobayashi, Masayuki Itoh, Masashi Tokunaga ยท 2026

Spatially resolved characterization of the critical current density Jc in superconductors under high magnetic fields is crucial for both fundamental understanding and practical applications. However, โ€ฆ

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Kohn-Sham Hamiltonian from Effective Field Theory: Quasiparticle Band Narrowing from Frozen Core Dynamics

Xiansheng Cai, Han Wang, Kun Chen ยท 2026

Kohn-Sham (KS) eigenvalues are routinely compared with angle-resolved photoemission (ARPES) and used as input for many-body methods, yet density functional theory (DFT) assigns them no physical meaninโ€ฆ

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Identifying strong correlation using only the Kohn-Sham density of one-electron states

Daniel D. Rivera, Gustavo M. Dalpian, John P. Perdew ยท 2026

Strongly correlated systems have long been a central and highly non-trivial topic in condensed matter physics. At the non-interacting level, strong correlation can be associated with powerful (near) dโ€ฆ

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Modeling the Zero-Phonon Line of Strained SnV Centers in Diamond; Including Reflections on Computational Cost and Accuracy

Danny E. P. Vanpoucke ยท 2026

Among the group-IV vacancy color centers in diamond, the SnV holds promise for photonics based quantum applications. In this work, the Tin-Vacancy (SnV) zero-phonon line (ZPL) and its pressure coefficโ€ฆ

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Efficient Quantum Fully Homomorphic Encryption

Fengxia Liu, Zixian Gong, Kun Tian, Yi Zhang, Zhiming Zheng, Maozhi Xu ยท 2026

Quantum fully homomorphic encryption (QFHE) promises secure delegated quantum computation but has been impeded by the prohibitive quantum resource demands of existing constructions. This paper introduโ€ฆ

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Dr.Sai: An agentic AI for real-world physics analysis at BESIII

Mingfeng He, Fayu Jiang, Junkun Jiao, Mingrun Li, Ke Li, Yipu Liao, Beijiang Liu, Tong Liu, Fazhi Qi, Zijie Shang, Weimin Song, Yue Sun, Xiongfei Wang, Hong Wang, Dongbo Xiong, Changzheng Yuan, Bolun Zhang, Zhengde Zhang, Xuliang Zhu ยท 2026

High Energy Physics (HEP) experiments like BESIII produce petabyte-scale data. Extracting physics results requires complex workflows (simulation, reconstruction, statistical analysis, etc.) that tradiโ€ฆ

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Classifying magnons in itinerant ferromagnets from linear response TDDFT: Fe, Ni and Co revisited

Thorbj{o}rn Skovhus, Thomas Olsen ยท 2026

The magnetic excitation spectrum of itinerant magnets exhibits rich and complex spectral features that often complicate interpretation of the underlying physics. For perturbations in the long wavelengโ€ฆ

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Spin-wave hybridization in bismuth iron garnet Mie spheres induced by the inverse Faraday effect

Fedor Shuklin, Khristina Albitskaya, Alexander Chernov, Mihail Petrov ยท 2026

We show that the inverse Faraday effect can be used to engineer dipole--exchange spin-wave spectra in ferrimagnetic bismuth iron garnet (BIG) Mie spheres. Internal optical Mie resonances generate spatโ€ฆ

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Entropy bound and the non-universality of entanglement islands

Naman Kumar ยท 2026

Entanglement islands resolve the AMPS firewall paradox in a region-dependent manner by modifying the entanglement wedge of Hawking radiation. We investigate whether this resolution can be made universโ€ฆ

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Quantum $f$-divergences via Nussbaum-Szko{\l}a Distributions in Semifinite von Neumann Algebras

Theodoros Anastasiadis, George Androulakis ยท 2026

In this article, we prove that the quantum $f$-divergence between two normal states on a semifinite von~Neumann algebra is equal to the classical $f$-divergence between two corresponding classical staโ€ฆ

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Exotic $T^*_{csJ}$ and $T^*_{c\bar{s}J}$ states and coupled-channel scattering at the $SU(3)$ flavour symmetric point from lattice QCD

J. Daniel E. Yeo, Christopher E. Thomas, David J. Wilson ยท 2026

Motivated by recent experimental observations of the flavour-exotic $T^*_{cs0}(2870)^0$ and $T^*_{c\bar{s}0}(2900)$, we present the first lattice QCD study of coupled-channel scattering of a charm mesโ€ฆ

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True random number generation through stochastic magnonic bistability

Mengying Guo, Zhenyu Zhou, Denys Slobodianiuk, Roman Verba, Kristyna Davidkova, Xueyu Guo, Xudong Jing, Yueqi Wang, Bjorn Heinz, Yiheng Rao, Carsten Dubs, Caihua Wan, Xiufeng Han, Andrii V. Chumak, Philipp Pirro, Qi Wang ยท 2026

True random number generators (TRNGs) underpin modern cryptography, yet existing implementations face fundamental trade-offs between speed, scalability, and entropy quality. Here, we demonstrate that โ€ฆ

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Coherent Microwave Driving of Domain Wall Depinning in a Ferrimagnetic Garnet

Hanchen Wang, Laura van Schie, Adam Erickson, Lauren J. Riddiford, Davit Petrosyan, Christian L. Degen, Richard Schlitz, William Legrand, Pietro Gambardella ยท 2026

Coherent control of domain wall dynamics offers a route to fast manipulation of magnetic textures beyond thermally activated motion. We demonstrate resonant excitation of linear and nonlinear dynamicsโ€ฆ

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