🔬 physics

Distinguishability Geometry as a Universal Foundation for Physical Dynamics

This paper proposes that physical distinguishability serves as the fundamental primitive of reality, from which a unified geometric framework naturally derives quantum mechanics, general relativity, and thermodynamics as different manifestations of a universal saturation threshold, while simultaneously resolving the cosmological constant problem and offering experimentally verified predictions for quantum dynamics and vacuum energy.

Alexander Tishin2026-07-22
🔬 physics

Dynamic bond reconfiguration drives crack-tip carbon migration to strengthen iron grain boundaries

By developing a machine-learning potential to simulate carbon-segregated iron grain boundaries, this study reveals that dynamic bond reconfiguration—where carbon atoms continuously break and reform bonds to follow a moving crack tip—dynamically amplifies static strengthening and significantly enhances resistance to brittle fracture.

Kazuma Ito, Takashi Otaki, Yuta Yoshimoto, Naoki Matsumura2026-07-22
🔬 physics

Imaging 131 I in mouse phantoms and living mice with the MACACO III+ Compton camera

This study demonstrates that the MACACO III+ LaBr3-based Compton camera can successfully image iodine-131 distributions in mouse phantoms and living mice with image quality comparable to a commercial SPECT system but in significantly shorter acquisition times, highlighting its potential for preclinical radiopharmaceutical therapy development.

Karol Brzeziński, Luis Barrientos, José Vicente Casaña, Irati Aiestaran-Zelaia, Unai Cossío, Jordi Llop, Gabriela Llosá2026-07-22
🔬 physics

Toward a Quantum Diagnostic Intelligence System: A Multi-Layer Architecture for Circuit-Level Assessment of Quantum Hardware Operational State

This paper introduces Quantum Diagnostic Intelligence (QDI), a five-layer architecture that infers the operational state of quantum hardware using circuit-level measurements to reveal diagnostic information often missed by standard pulse-level metrics like T₁ and T₂, while acknowledging current limitations regarding rule-based operators and the need for further prospective validation.

RamaKrishna Pasupuleti2026-07-22
🔬 physics

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