🔬 Category

physics

858 papers

🔬 physics

Ground-State Preparation by Projection onto the Maximal Decoherence-Free Subspace: Operator-Algebraic Derivation and Constant-Depth Execution on 156-Qubit Processors

This paper presents and experimentally validates on 156-qubit IBM processors a novel, constant-depth quantum framework for ground-state preparation that utilizes operator-algebraic projection onto maximal decoherence-free subspaces to bypass variational optimization and Trotterization, while explicitly bounding the method's applicability to problems with classically computable ground-state energies.

Mohamed Hassan2026-09-09
🔬 physics

SAGE-QEC: Structure-Aware Gated Error Correction for Surface-Code Memories Under Structured Noise

SAGE-QEC is a structure-aware, selective decoder that enhances surface-code memory reliability under structured noise by dynamically switching from the standard PyMatching baseline to an alternative candidate when specific syndrome patterns indicate failure, achieving an 8.47% relative reduction in logical error rates across diverse simulator conditions.

Asia Alhammadi, Mohammed Al-Absi2026-09-09
🔬 physics

Motion of a charged particle in its own field: avoiding the ultraviolet divergence

This paper proposes that the Current Magnetisation Hypothesis (CMH) resolves the ultraviolet divergence and infinite self-energy of classical point charges by introducing an effective magnetisation potential that vanishes at the source worldline, thereby yielding a finite self-field and zero self-force without requiring mass renormalisation, while also offering a method to eliminate infrared divergences in extended sources.

Sherif Tawfik2026-09-09
🔬 physics

Analytical Construction of the CKM Matrix Using a Single Electroweak Constant

This paper presents a parameter-free analytical construction of the Cabibbo-Kobayashi-Maskawa (CKM) quark mixing matrix, deriving all nine elements and the four Wolfenstein parameters from a single universal electroweak constant λ=1/(π2)\lambda = 1/(\pi\sqrt{2}) via the geometry of the SU(2)L⊗SU(2)R⊗U(1)B−L\mathrm{SU}(2)_L\otimes\mathrm{SU}(2)_R\otimes\mathrm{U}(1)_{B-L} vacuum, achieving sub-sigma agreement with experimental data without any free inputs.

Pramod Kumar Meher2026-09-09
🔬 physics

A Closed-Form Analytic Formulation of the PMNS Lepton Mixing Matrix

This paper proposes a closed-form analytic framework that derives the entire PMNS lepton mixing matrix and its associated CP-violating parameters from a single universal electroweak constant, λ=1/(π2)\lambda = 1/(\pi\sqrt{2}), by leveraging the sign reversal of the core hypercharge (B−L)(B-L) to explain the transition from rigid quark mixing to large-angle lepton mixing without any free parameters.

Pramod Kumar Meher2026-09-09
🔬 physics

A tunable chiral light–matter interface with on-chip spin control

This paper demonstrates a tunable, on-chip chiral light–matter interface where an external magnetic field controls the coupling between a quantum emitter and a photonic-crystal waveguide to achieve near-unity directional emission and coherent spin control, thereby enabling a robust protocol for generating high-fidelity remote spin–spin entanglement without requiring specialized waveguide polarization engineering.

Shikai Liu, Joan Alba, Bálint Sárközi, Nikolai Bart, Arne Ludwig, Ming Lai Chan, Peter Lodahl, Anders Sørensen2026-09-09
🔬 physics

Interior spacetime curvature and positron yield of a stationary capsule enclosed by a chopped near-light-speed energy shell

This paper proposes a theoretical framework for a stationary capsule enclosed by a chopped near-light-speed electron–laser energy shell, demonstrating that while the interior spacetime curvature remains negligible and the chopping mechanism minimally impacts positron yield, the resulting time-stamped bursts enable a significant 10⁷-fold improvement in the laboratory bounds on a specific coupling parameter.

Hasan Börekci2026-09-09