Quantum Nature of the Big Bang: Improved dynamics

gr-qc 2026-07 unverdicted novelty 7.0 of 10

Extended Born-Oppenheimer coupling of the EM field to quantum geometry yields chromatic dispersion of light—a prism effect proposed as an all-energy quantum-gravity probe on a quantum FLRW background.

gr-qc 2026-08 conditional novelty 6.0 of 10

Asymmetric loop-quantum-cosmology collapse of a dust ball yields a geodesically complete, bouncing regular black hole spacetime with a C^0 shock at the dust surface and two joined vacuum geometries.

gr-qc 2026-08 conditional novelty 6.0 of 10

In a loop quantum cosmology model with negative cosmological constant, semiclassical states built by integrating over all superselection sectors behave no differently from single-sector states, with differences below ...

gr-qc 2026-05 unverdicted novelty 6.0 of 10

A phenomenological loop-quantum-gravity-inspired model resolves black hole singularities by creating a dynamical anti-trapped region that ejects all stellar mass as a stable outgoing solitary wave.

gr-qc 2026-01 unverdicted novelty 6.0 of 10

A Hamiltonian formulation of Darmois-Israel junction conditions extends LQG-inspired stellar collapse models beyond shell-crossing singularities by treating them as timelike thin dust shells, yielding an inter-univers...

gr-qc 2025-11 conditional novelty 6.0 of 10

In a sharply peaked Gaussian state of a flat FLRW universe with a massless scalar clock, Krylov state complexity grows as σ²(φ−φ0)²/4 and operator complexity is exactly twice that, in both Wheeler-DeWitt and loop quan...

gr-qc 2025-07 unverdicted novelty 6.0 of 10

Loop quantum cosmology models harbor physical singularities or inconsistent space-time structures, with a new effective Friedmann equation revealing a sub-Planckian bounce after a singularity at infinite scale factor ...

gr-qc 2025-05 conditional novelty 6.0 of 10

A proof-of-principle that simple neural networks can learn Euclidean Barrett-Crane 10j vertex amplitudes: classification generalizes to higher cutoffs, regression works only within the trained low-spin domain.

gr-qc 2025-04 conditional novelty 6.0 of 10

In a covariant LQG black hole model, Hawking temperature is unchanged while greybody factors gain sub-leading corrections, and a derived mass hierarchy favors black-to-white-hole transitions over remnants.

gr-qc 2025-02 accept novelty 6.0 of 10

Constant-polymerization loop quantization of Schwarzschild-de Sitter in Kantowski-Sachs gauge generates a spurious low-curvature black hole horizon, while Schwarzschild-anti-de Sitter does not.

gr-qc 2025-02 conditional novelty 6.0 of 10

In effective loop quantum gravity, an infinite family of mathematically equivalent collapse equations produce different weak solutions after shell crossing, so the predicted black hole lifetime (e.g., M^2, M^3, M^4) i...

gr-qc 2024-12 conditional novelty 6.0 of 10

The Hamiltonian of single-vertex states in quantum-reduced loop gravity formally matches Bianchi I loop quantum cosmology, and an analogy suggests adding a non-trivial Lorentzian curvature term to the cosmology Hamiltonian.

gr-qc 2024-11 conditional novelty 6.0 of 10

Emergent modified gravity rules out most proposed loop quantum gravity black-hole models and shows that mu0 and mu-bar holonomy schemes are canonically equivalent, so they are not physically distinct.

gr-qc 2024-11 conditional novelty 6.0 of 10

Spinning-particle ISCOs in two covariant loop quantum gravity black hole metrics are computed, showing ISCO disappearance for large quantum parameter in one metric and persistence with restricted spin in the other.

gr-qc 2026-07 conditional novelty 5.0 of 10

In unimodular loop quantum cosmology, an α-attractor potential allows a potential-energy-dominated bounce at the Planck scale that is consistent with CMB observations and may show quantum-gravity imprints.

gr-qc 2026-07 conditional novelty 5.0 of 10

Keeping the nonareal polymer angular sector in a polymer-quintessence thin-shell wormhole adds a momentum-flux term that reshapes stability, thermodynamics, and cross-throat image branches.

quant-ph 2026-06 unverdicted novelty 5.0 of 10

Polymer quantization on compact spaces yields finite graph Hilbert spaces whose exact ring and box spectra recover Schrödinger QM as lattice spacing vanishes.

gr-qc 2026-06 unverdicted novelty 5.0 of 10

A new LQC model with an added curvature term produces a quantum bounce that resolves the singularity at lower volume than standard LQC while preserving symmetric effective dynamics.

gr-qc 2026-05 unverdicted novelty 5.0 of 10

Quasinormal modes of a massless scalar field on a rotating loop quantum black hole background exhibit reduced real frequencies and damping rates with increasing quantum corrections, with rotation introducing crossover...

gr-qc 2025-11 unverdicted novelty 5.0 of 10

A Hamiltonian is constructed that renders a deformed Poisson bracket spacetime theory canonical and covariant, enabling consistent coupling to scalar matter and dust.

gr-qc 2025-09 unverdicted novelty 5.0 of 10

A quasi-dust ekpyrotic two-field model in Loop Quantum Cosmology produces viable primordial power spectra via coupled scalar and tensor perturbations.

gr-qc 2025-05 conditional novelty 5.0 of 10

A new quantum-corrected mass function in loop quantum cosmology, with a free parameter xi, produces a wave-packet structure in the primordial power spectrum and matches the CMB angular spectrum best at xi = 0.2.

gr-qc 2025-05 unverdicted novelty 5.0 of 10

A stable initial state is identified in mLQC-I that diagonalizes the Hamiltonian and minimizes particle creation, with mode functions approximated analytically by Airy or cylindrical functions whose constants are fixe...

gr-qc 2024-12 conditional novelty 5.0 of 10

For any weight parameter in the improved-dynamics LQC Hamiltonian, negative weights give essentially self-adjoint operators, while positive weights require U(1)-labeled self-adjoint extensions, which the paper impleme...

gr-qc 2024-12 conditional novelty 5.0 of 10

The paper reformulates quantum-reduced loop gravity with a master constraint operator and finds that its single-node Hamiltonian matches the Bianchi I loop quantum cosmology Hamiltonian.

gr-qc 2026-07 unverdicted novelty 4.0 of 10

Dynamical systems analysis shows loop quantum cosmology removes stable attractors in interacting dark energy-dark matter models that exist under classical gravity.

gr-qc 2025-10 conditional novelty 4.0 of 10

For the no-Cauchy-horizon quantum-corrected metric, a larger quantum parameter produces larger horizon, photon sphere, ISCO, and shadow, with narrower and tighter-spaced photon and lensed rings.

gr-qc 2025-05 conditional novelty 4.0 of 10

For flat loop quantum cosmology with logarithmic entropy corrections, the standard generalized second law fails just after the bounce for most correction values, and a sign-flipped law with negative temperatures is va...

gr-qc 2025-10 reject novelty 3.0 of 10

The paper postulates that the second law should read sign(T)dS ≥ 0, permitting entropy decrease for negative-temperature systems, and illustrates it with LQC and Onsager vortices.

gr-qc 2025-07 conditional novelty 3.0 of 10

A polymer black hole with quintessence yields a shadow that can match Sgr A* for many combinations of free parameters while cooling and dimming the black hole.