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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

Transverse Orbital angular momentum of twisted spatiotemporal optical vortex random beams

This study theoretically and numerically investigates the transverse orbital angular momentum properties of partially coherent twisted spatiotemporal optical vortex beams, demonstrating how their twist and vortex phases influence flux density distribution and total OAM preservation during free-space propagation.

Chengyao Zhong, Yongtao Zhang, Fei Wang, Yangjian Cai, Greg Gbur2026-07-22

🔬 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

🔬 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

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