physics papers | Gist.Science

Circuit-Level vs Pulse-Level Quantum Hardware Diagnostics: K–R Scaling Exponent Detects Device Degradation Invisible to T₁/T₂ Calibration

This paper demonstrates that circuit-level diagnostics using the K–R scaling exponent can detect significant device degradation and predict algorithm failures that remain invisible to standard pulse-level T₁/T₂ coherence metrics, as evidenced by a case where reported T₂ improvements coincided with a 920% increase in circuit error on IBM Heron processors.

RamaKrishna Pasupuleti2026-07-22

🔬 physics

Engineering Hybrid Fano Resonances in Periodic Gold Nanorod– Dye Architectures for High-Performance Refractive-Index Sensing

This paper theoretically demonstrates that periodic gold nanorods conformally coated with a molecular dye layer can generate narrow hybrid Fano resonances through cooperative plasmon–exciton coupling and cavity feedback, achieving high-performance refractive-index sensing with a figure of merit of 116.35 RIU⁻¹ and a detection limit of 3.0 × 10⁻⁵ RIU for both wavelength-shift and intensity-based interrogation.

maedeh sadaghzadeh, Ahmad Mohammadi, tahmineh jalali2026-07-22

🔬 physics

Field-Controlled Modulation Transport in Electro-Optically Accessible Semiconductor Microcavities for Ultrabroadband Optical Interconnects

This paper introduces a field-controlled modulation transport framework in electro-optically integrated GaAs-LiNbO3 VCSELs that bypasses conventional carrier-photon relaxation-oscillation limits, enabling sub-terahertz bandwidths and nearly an order-of-magnitude enhancement in optical interconnect performance.

Babu Dayal Padullaparthi2026-07-22

🔬 physics

A Relativistic Correction to the 1925 Lorentz-Pauli Calculation of Electron Spin

This paper identifies a historical oversight in the 1925 Lorentz-Pauli objection to electron spin by demonstrating that incorporating relativistic field transformations allows a near-light-speed surface velocity to generate the observed magnetic moment, thereby correcting the classical calculation without validating a mechanical origin for spin.

Frank Wang2026-07-22

🔬 physics

A T-count Zero Protocol for Heralded W-state Preparation via Clifford-only Gates

This paper proposes a T-count zero, heralded probabilistic protocol for preparing 3-qubit W-states using only Clifford gates and post-selection, offering a resource-efficient alternative to traditional non-Clifford methods by achieving a 75% success rate with reduced circuit depth and error susceptibility.

Amrita Mitra2026-07-22

🔬 physics

Broadband radio-frequency chaos synthesis with Vernier chaotic microcombs

This paper introduces a Vernier chaotic dual-microcomb platform that overcomes the gigahertz bandwidth limitation of individual microcomb teeth by mapping multiple spectral elements into the radio-frequency domain, successfully generating broadband RF chaos exceeding 40 GHz to enable terabit-per-second random-bit generation and scalable chaotic waveform synthesis.

Baicheng Yao, An-Ran Li, Yong Geng, Ning Jiang, Hao-Nan Xu, Guan-Qi Chen, Yiqun Zhang, Ying-Jun Fang, Li-Lu Wang, Qiang (…)2026-07-21

🔬 physics

Differential reflectance Signature of Fano Resonance and Antiresonance in a Reflective Au Diffraction-Grating Structure

This study demonstrates that differential reflectance serves as an effective readout for detecting Fano resonance and antiresonance in a reflective gold diffraction grating, where the coupling between localized and propagating surface plasmons enables high-performance sensing of low-refractive-index liquids.

Atsushi Motogaito, Keita Ukai, Taiyo Nabuchi, Takeshi Kato, Kazumasa Hiramatsu2026-07-21

🔬 physics

Planck-Anchored Discrete Scale Invariance: Lorentz Compatibility, Renormalization-Group Obstructions, and an Emergent Log-Periodic Structure in Asymptotically Safe Gravity

This paper proposes that Planck-anchored discrete scale invariance is a viable, Lorentz-compatible framework for quantum gravity that emerges from the complex critical exponents of the asymptotically safe ultraviolet fixed point, predicting specific log-periodic oscillations in cosmological observables while evading constraints associated with continuous scale symmetry.

Farid BENCHERIF2026-07-21

🔬 physics

Smaller, closer, and fully negative: optical torque engineering in dielectric-metal heterodimers

This paper presents analytical expressions and theoretical findings demonstrating that dielectric-metal heterodimers, specifically silicon-silver pairs with sub-70 nm radii, exhibit counterintuitive linear torque increases with distance and achieve stable, fully negative optical torque across a broad range of interparticle separations, significantly outperforming traditional gold homodimers.

Xiao-Yong Duan, Yu-Hang Du, Yu Wang, Li-Gang Wang2026-07-21

🔬 physics

Biorthogonal Covariance Amplification Near the Breathing Threshold of Dissipative Kerr Solitons

This paper demonstrates that linearly stable dissipative Kerr solitons near their breathing threshold exhibit substantial stochastic sensitivity amplification driven by nonnormal biorthogonal geometry and auxiliary-to-optical coupling rather than thermal feedback, quantified by a finite Petermann-like factor and clarified through phase-fixed Lyapunov covariance analysis.

Mauricio Herrera2026-07-21

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