Pei-Ming Ho

Split-Step Dirac Cellular Automata for Continuous-Time Dirac Dynamics on Finite Spatial Lattices

Wei-Ting Wang, Pei-Ming Ho, Ching-Ray Chang

Dirac Cellular Automata (DCA) provide a framework for simulating Dirac dynamics, yet the rigid coupling between spatial and temporal resolutions can introduce artificial phase-matching symmetries on finite grids that suppress interference phenomena such as Zitterbewegung. In this work, we propose a Split-Step …

Macroscopic Black-Hole Remnants in a Nonlocal Field Theory: Towards Hawking Radiation in SFT

Feng-Yin Cheng, Pei-Ming Ho, Wei-Hsiang Shao

We demonstrate that, for a large black hole of radius $a$, Hawking radiation terminates around the scrambling time $u_{\text{scr}} \equiv 2a \log(a/\ell)$ due to the nonlocal, exponential suppression of trans-Planckian interactions inherent in string field theory (SFT). Modifying a massless scalar field's …

Macroscopic Black-Hole Remnants in a Nonlocal Field Theory: Towards Hawking Radiation in SFT

Feng-Yin Cheng, Pei-Ming Ho, Wei-Hsiang Shao

We demonstrate that, for a large black hole of radius $a$, Hawking radiation terminates around the scrambling time $u_{\text{scr}} \equiv 2a \log(a/\ell)$ due to the nonlocal, exponential suppression of trans-Planckian interactions inherent in string field theory (SFT). Modifying a massless scalar field's …

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General actions of extended objects and volume-preserving diffeomorphism

Pei-Ming Ho, H. Kawai, Henry Liao

We consider actions that are general functions of the world sheet/world volume metric and the induced metric for extended objects embedded in spacetime as Riemannian manifolds, area-metric manifolds, and volume-metric manifolds. For strings on a Riemannian spacetime, we consider general actions respecting …

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Exponentially Long Evaporation of Noncommutative Black Hole

Pei-Ming Ho, Wei-Hsiang Shao, Takuya Yoda

We investigate Hawking radiation in noncommutative spacetime. For a dynamical black hole formed by the collapse of a matter shell, we demonstrate that spacetime noncommutativity modifies the interaction between the radiation field and the background geometry. In particular, the collapsing shell is …

Exponentially Long Evaporation of Noncommutative Black Hole

Pei-Ming Ho, Wei-Hsiang Shao, Takuya Yoda

We investigate Hawking radiation in noncommutative spacetime. For a dynamical black hole formed by the collapse of a matter shell, we demonstrate that spacetime noncommutativity modifies the interaction between the radiation field and the background geometry. In particular, the collapsing shell is …

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General Actions of Extended Objects and Volume-Preserving Diffeomorphism

Pei-Ming Ho, Hikaru KAWAI, Henry Liao

We consider actions that are general functions of the worldsheet/worldvolume metric and the induced metric for extended objects embedded in spacetime as Riemannian manifolds, areal-metric manifolds, and volume-metric manifolds. For strings on a Riemannian spacetime, we consider general actions respecting volume-preserving diffeomorphisms …

General Actions of Extended Objects and Volume-Preserving Diffeomorphism

Pei-Ming Ho, Hikaru KAWAI, Henry Liao

We consider actions that are general functions of the worldsheet/worldvolume metric and the induced metric for extended objects embedded in spacetime as Riemannian manifolds, areal-metric manifolds, and volume-metric manifolds. For strings on a Riemannian spacetime, we consider general actions respecting volume-preserving diffeomorphisms …

General Relativity in IIB matrix model

Pei-Ming Ho, Hikaru KAWAI, Harold Steinacker

A bstract The matrix models are non-perturbative formulations of string theory, from which many believe that spacetime arises. The matrix fluctuations around the spacetime thus created should represent both matter and gravitational fields. In this paper, we discuss how the gravitational field …

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Volume-Preserving Diffeomorphism and Gravity in the IKKT Matrix Model

Pei-Ming Ho

Towards Hamiltonian formalism for string field theory and nonlocality

Pei-Ming Ho, I.-M. Lee, Wei-Hsiang Shao

A bstract String field theories exhibit exponential suppression of interactions among the component fields at high energies due to infinite-derivative factors such as $$ {e}^{\ell^2\square /2} $$ e ℓ 2 □ / 2 in the vertices. This nonlocality has hindered the development …

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General Relativity in IIB Matrix Model

Pei-Ming Ho, H. Kawai, Harold Steinacker

The matrix models are non-perturbative formulations of string theory, from which many believe that spacetime arises. The matrix fluctuations around the spacetime thus created should represent both matter and gravitational fields. In this paper, we discuss how the gravitational field emerges from …