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Moinul Hossain Rahat

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hep-th hep-ph Artificial Intelligence astro-ph.HE Computation and Language hep-ex quant-ph

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preprint2026arXiv

Litespark Inference on Consumer CPUs: Custom SIMD Kernels for Ternary Neural Networks

Large language models (LLMs) have transformed artificial intelligence, but their computational requirements remain prohibitive for most users. Standard inference demands expensive datacenter GPUs or cloud API access, leaving over one billion personal computers underutilized for AI workloads. Ternary models offer a path forward: their weights are constrained to {-1, 0, +1}, theoretically eliminating the need for floating-point multiplication. However, existing frameworks fail to exploit this structure, treating ternary models as dense floating-point networks. We address this gap with custom SIMD kernels that replace matrix multiplication with simple addition and subtraction operations, targeting the integer dot product instructions available on modern CPUs. Our implementation, Litespark-Inference, is pip-installable and integrates directly with Hugging-Face, achieving 9.2x faster time-to-first-token, 52x higher throughput, and 14x memory reduction compared to standard PyTorch inference on Apple Silicon, with similar speedups on Intel and AMD processors.

preprint2022arXiv

Constraining Low-Scale Flavor Models with $\boldsymbol{(g-2)_μ}$ and Lepton Flavor Violation

We present here two concrete examples of models where a sub-TeV scale breaking of their respective $\mathcal{T}_{13}$ and $A_5$ flavor symmetries is able to account for the recently observed discrepancy in the muon anomalous magnetic moment, $(g-2)_μ$ . Similarities in the flavor structures of the charged-lepton Yukawa matrix and dipole matrix yielding $(g-2)_μ$ give rise to strong constraints on low-scale flavor models when bounds from lepton flavor violation (LFV) are imposed. These constraints place stringent limits on the off-diagonal Yukawa structure, suggesting a mostly (quasi-)diagonal texture for models with a low flavor breaking scale $Λ_f$ . We argue that many of the popular flavor models in the literature designed to explain the fermion masses and mixings are not suitable for reproducing the observed discrepancy in $(g-2)_μ$ , which requires a delicate balance of maintaining a low flavor scale while simultaneously satisfying strong LFV constraints.

preprint2021arXiv

Leptogenesis from the Asymmetric Texture

We investigate non-resonant thermal leptogenesis in the context of the $SU(5) \times \mathcal{T}_{13}$ "asymmetric texture", where both Dirac and Majorana ${CP}$ violation arise from a single phase in the tribimaximal seesaw mixing matrix. We show that the baryon asymmetry of the universe can be explained in this model only when flavor effects are considered for right-handed neutrino masses of $\mathcal{O}(10^9 - 10^{12})$ $\text{GeV}$ . The sign of the baryon asymmetry also determines the sign of the previously predicted Dirac $\require{cancel}\cancel{CP}$ phase $|δ_{CP}| = 1.32π$ , consistent with the latest global fit $δ_{CP}^{PDG} = 1.37 \pm 0.17π$ .

preprint2020arXiv

Tribimaximal Mixing in the $SU(5) \times \mathcal{T}_{13}$ Texture

We extend the recently proposed $SU(5) \times \mathcal{T}_{13}$ model for the asymmetric texture to the up-type quark and seesaw sectors. The hierarchical up-type quark masses are generated from higher-dimensional operators involving family-singlet Higgses, gauge-singlet familons, and vectorlike messengers. The complex-tribimaximal (TBM) seesaw mixing arises from the vacuum structure of a minimal number of familons, resulting in an alignment between the Yukawa and Majorana matrices of the seesaw formula. Introducing four right-handed neutrinos, normal ordering of the light neutrino masses is obtained, with $m_{ν_1} = 27.6\ \mathrm{meV}$ , $m_{ν_2} = 28.9\ \mathrm{meV}$ and $m_{ν_3} = 57.8\ \mathrm{meV}$ . Their sum almost saturates Planck's cosmological upper bound ( $120$ $\text{meV}$ ). The right-handed neutrino masses are expressed in terms of two parameters for a particular choice of familon vacuum alignment. We predict the $\require{cancel}\cancel{CP}$ Jarlskog-Greenberg invariant to be $|\mathcal{J}| = 0.028$ , consistent with the current PDG estimate, and Majorana invariants $|\mathcal{I}_1| = 0.106$ and $|\mathcal{I}_2| = 0.011$ . A sign ambiguity in the model parameters leads to two possibilities for the invariant mass parameter $|m_{ββ}|$ : $13.02$ or $25.21$ $\text{meV}$ , both within an order of magnitude of the most rigorous experimental upper limit ( $61$ -- $165$ $\text{meV}$ ).

preprint2014arXiv

Comments on Information Erasure in Black Hole

We analyze the Kim, Lee & Lee model of information erasure by black holes and find contradictions with standard physical laws. We demonstrate that the erasure model leads to arbitrarily fast information erasure; the proposed physical interpretation of information freezing at the event horizon as observed by an asymptotic observer is problematic; and information erasure, whatever the process may be, near the black hole horizon leads to contradictions with quantum mechanics if Landauer's principle is assumed. The later part of the work demonstrates the significance of the "erasure entropy." We show that the erasure entropy is the mutual information between two subsystems.

preprint2014arXiv

Does Considering Quantum Correlations Resolve the Information Paradox?

In this paper, we analyze whether quantum correlations between successive steps of evaporation can open any way to resolve the black hole information paradox. Recently a celebrated result in literature shows that `small' correction to leading order Hawking analysis fails to restore unitarity in black hole evaporation. We study a toy qubit model of evaporation allowing small quantum correlations between successive steps and verify the previous result. Then we generalize the concept of correction to Hawking state by relaxing the `smallness' condition. Our result generates a nontrivial upper and lower bound on change in entanglement entropy in the evaporation process. This gives us a quantitative measure of correction that would mathematically facilitate restoration of unitarity in black hole evaporation. We then investigate whether this result is compatible to the established physical constraints of unitary evolution of a state in a subsystem. We find that the generalized bound on entanglement entropy leads to significant deviation from Page curve. This leads us to agree with the recent claim in literature that no amount of correction in the form of Bell pair states would lead to any resolution to the information paradox.

preprint2014arXiv

Tunneling across the quantum horizon does not resolve the information paradox

Parikh and Wilczek formulated Hawking radiation as quantum tunneling across the event horizon proving the spectrum to be nonthermal. These nonthermality factors emerging due to back reaction effects have been claimed to be responsible for correlations among the emitted quanta. It has been proposed by several authors in literature that these correlations actually carry out information locked in a black hole and hence provide a resolution to the long debated black hole information paradox. This paper demonstrates that this is a fallacious proposition. Finally, it formulates the implications of the no-hair theorem in the context of Parikh-Wilczek spectrum.

preprint2013arXiv

A Novel Parametric Bound for Information Retrieval from Black Hole Radiation

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Moinul Hossain Rahat

Research overview

Is this your work?

8 publications

Litespark Inference on Consumer CPUs: Custom SIMD Kernels for Ternary Neural Networks

Constraining Low-Scale Flavor Models with $\boldsymbol{(g-2)_μ}$ and Lepton Flavor Violation

Leptogenesis from the Asymmetric Texture

Tribimaximal Mixing in the $SU(5) \times \mathcal{T}_{13}$ Texture

Comments on Information Erasure in Black Hole

Does Considering Quantum Correlations Resolve the Information Paradox?

Tunneling across the quantum horizon does not resolve the information paradox

A Novel Parametric Bound for Information Retrieval from Black Hole Radiation

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Building this map preview

Moinul Hossain Rahat

Research overview

Is this your work?

8 publications

Litespark Inference on Consumer CPUs: Custom SIMD Kernels for Ternary Neural Networks

Constraining Low-Scale Flavor Models with (g−2)μ\boldsymbol{(g-2)_μ}(g−2)μ​ and Lepton Flavor Violation

Leptogenesis from the Asymmetric Texture

Tribimaximal Mixing in the SU(5)×T13SU(5) \times \mathcal{T}_{13}SU(5)×T13​ Texture

Comments on Information Erasure in Black Hole

Does Considering Quantum Correlations Resolve the Information Paradox?

Tunneling across the quantum horizon does not resolve the information paradox

A Novel Parametric Bound for Information Retrieval from Black Hole Radiation

See the researcher in context

Building this map preview

Constraining Low-Scale Flavor Models with $\boldsymbol{(g-2)_μ}$ and Lepton Flavor Violation

Tribimaximal Mixing in the $SU(5) \times \mathcal{T}_{13}$ Texture