Markovian quantum master equations are exponentially accurate in the weak coupling regime

The paper demonstrates that for open quantum systems coupled to Gaussian environments, the evolution can be described by a Markovian quantum master equation with an error that decreases exponentially with the inverse system-bath coupling strength, achieved through a generalized Born-Markov approximation that can be iterated to arbitrarily high orders.

Johannes Agerskov, Frederik Nathan2026-03-06⚛️ quant-ph

Tight inapproximability of max-LINSAT and implications for decoded quantum interferometry

This paper proves that max-LINSAT is tightly inapproximable within any constant factor beyond the random-assignment ratio r/qr/q under PNP\mathsf{P} \neq \mathsf{NP}, a hardness threshold that coincides with the asymptotic performance limit of decoded quantum interferometry, thereby delineating the boundary between classical worst-case hardness and potential quantum advantage.

Maximilian J. Kramer, Carsten Schubert, Jens Eisert2026-03-06⚛️ quant-ph

Split Casimir Operator of the Lie Algebra so(2r) in Spinor Representations, Colour Factors and Yang-Baxter Equation

This paper derives characteristic identities for the split Casimir operator of the Lie algebra so(2r)so(2r) in spinor representations to construct invariant projectors, calculate colour factors for ladder Feynman diagrams in Spin(2r)Spin(2r) gauge theories, and obtain a new so(2r)so(2r)-invariant solution to the Yang-Baxter equation.

A. P. Isaev, A. A. Provorov2026-03-06🔬 physics

Causal Fermion Systems, Non-Commutative Geometry and Generalized Trace Dynamics

This paper compares causal fermion systems, non-commutative geometry, and generalized trace dynamics, highlighting their shared recovery of fiber bundle structures in the continuum limit and identifying the encoding of spacetime relations via a generalized two-point correlator—replacing Synge's world function—as the key innovation that can be unified across all three frameworks.

Felix Finster, Shane Farnsworth, Claudio F. Paganini + 1 more2026-03-06🔬 physics

Quantum "Twin Peaks" or Path Integrals in the Future Light Cone

This paper constructs a path integral measure invariant under the Lorentz group and quasi-invariant under diffeomorphisms by drawing an analogy with the rotationally invariant Wiener measure on the Euclidean plane, thereby establishing a correspondence between paths in the future light cone of Minkowski space and paths on the coverings of the Euclidean plane.

Vladimir V. Belokurov, Vsevolod V. Chistiakov, Klavdiia A. Lursmanashvili + 1 more2026-03-06🔬 physics

The Extra Vanishing Structure and Nonlinear Stability of Multi-Dimensional Rarefaction Waves: The Geometric Weighted Energy Estimates

This paper establishes the nonlinear stability of multi-dimensional rarefaction waves for the compressible Euler equations by introducing a novel Geometric Weighted Energy Method that overcomes derivative loss issues through the identification of a hidden vanishing structure in the top-order derivatives of the characteristic speed.

Haoran He, Qichen He2026-03-06🔬 physics

Six-dimensional supermultiplets from bundles on projective spaces

This paper utilizes the isomorphism between the six-dimensional nilpotence variety and P1×P3\mathbb{P}^1 \times \mathbb{P}^3 within the pure spinor superfield formalism to classify and explicitly construct various six-dimensional supermultiplets, including vector, hyper, and supergravity multiplets, by associating them with line bundles and higher-rank equivariant vector bundles on projective spaces.

Fabian Hahner, Simone Noja, Ingmar Saberi + 1 more2026-03-05🔬 physics

Anomalous scaling of heterogeneous elastic lines: a new picture from sample to sample fluctuations

This paper investigates a discrete model of a heterogeneous elastic line with random springs, demonstrating that when the spring constant distribution follows a power law with exponent μ<1\mu < 1, the system exhibits anomalous scaling driven by sample-to-sample fluctuations and abrupt shape jumps, a finding that challenges previous theoretical predictions and is validated by numerical simulations.

Maximilien Bernard, Pierre Le Doussal, Alberto Rosso + 1 more2026-03-05🔬 physics