Home > Postdocs
Orkash Amat
|
Postdoc
Contact: Email:orkashamat@nju.edu.cn
Personal introduction Biography

Orkash Amat is a postdoctoral researcher at the School of Astronomy and Space Science, Nanjing University. He earned his Ph.D. from the School of Physics and Astronomy, Beijing Normal University in June 2024. He has published 16 academic papers in journals both domestic and international, such as PRD, ApJ, and MNRAS, including 6 as the first author.

Research Highlights
For the first time in research on the coupled effects of quantum field theory and general relativity, he proposed the Generalized Quantum Two-Level Model (GQTLM) for strongly electromagnetic fields and curved spacetime. This model unifies the description of a series of coupling effects between curved spacetime and quantum systems, including quantum effects in the early universe, Hawking radiation, the Schwinger effect, gravitational vacuum pair production, gravitational atoms, quantum entanglement, and violations of Bell's inequalities.



Take Courses Teaching

None

Research Field Research Interests

l  Astroparticle Physics: Study the coupled effects of relativity and quantum mechanics in processes such as the early universe, Hawking radiation, the Schwinger effect, and the production of particle-antiparticle pairs in gravitational fields, as well as their applications in compact astrophysical objects.

l Quantum Field Theory in Curved Spacetime: Investigate quantum entanglement characteristics, violations of Bell's inequalities, Berry phases, phase vortices, high-energy vortex particle dynamics, and theoretical issues of gravitational atom systems in strongly electromagnetic fields and curved spacetime backgrounds.

l  High-Energy Particle Physics: Focus on the study of parton distribution functions and related partonic structures, as well as theoretical extensions and experimental tests of the Standard Model of particle physics.

l  Strong-Field Physics: Study the generation of ultra-relativistic vortex and spin-resolved electron-positron pairs and gamma photons in the vacuum of strong-field quantum electrodynamics (QED) and plasma environments, as well as their applications in particle physics and astrophysics.

l  Fast Radio Bursts and Gamma-Ray Burst Physics: Investigate the origin of fast radio bursts (FRBs) from the perspective of quantum field theory based on the Schwinger mechanism; and explore the generation and observational signatures of vortex gamma photons carrying intrinsic orbital angular momentum in gamma-ray bursts (GRBs) from a quantum field theory standpoint.

l  Nonlinear Scattering Processes Involving Particles and Astrophysical Vortices: Focus on vortex nonlinear Compton scattering (VNCS) and vortex nonlinear Breit-Wheeler (VNBW) processes in particle and astrophysics, with emphasis on their quantum entanglement properties, violations of Bell's inequalities, generation mechanisms of ultra-relativistic particle-antiparticle pairs, observational signals, and astrophysical applications.

l  Quantum Effects of Macroscopic Objects: Explore whether quantum coupling and correlations, as described by "Third Quantization" exist between macroscopic objects on astrophysical scales.

Academic publications Publications

Total Publications: 16

Links to my full publication list on: ResearchGate, ORCID, INSPIRE-HEP, NASA/ADS

[1] Orkash Amat, N. Nurmamat, Y. F. Huang, C. M. Li, J. J. Geng et al. Axial current as the origin of quantum intrinsic orbital angular momentum, Phys. Rev. D 112, L091902 (2025).

[2] Orkash Amat, H. H. Fan, S. Tang, Y. F. Huang and B. S. Xie, Spin resolved momentum spectra for vacuum pair production via a generalized two level model, Phys. Rev. D 111, 056020 (2025).

[3] Orkash Amat, Li-Na Hu, Mamat Ali Bake, Melike Mohamedsedik, and B. S. Xie. Effect of spatially oscillating field on Schwinger pair production, Phys. Rev. D 108, 056011 (2023).

[4] Orkash Amat, Li-Na Hu, Adiljan Sawut, Melike Mohamedsedik, M. A. Bake, and B. S. Xie. Schwinger pair production rate and time for some space-dependent electromagnetic fields via worldline instantons formalism, Eur. Phys. J. D 76, 188 (2022).

[5] Orkash Amat et al. Impact of LHC top-quark pair measurements to CTEQ-TEA PDF analysis, PoS. DIS2019, 017 (2019).

[6] 吾热卡西·艾麦提, 阿力木·阿布来提, 沙依甫加马力·达吾来提 和 霍文生, LHCb=8 TeV的Drell-Yan-Z→e+e-数据对部分子分布函数的影响, 杭州师范大学学报(自然科学版), 2020.

[7] Z. Y. Chen, Orkash Amat J. h. Bai and M. A. Bake, Spin effect in vacuum pair production under two-color rotating electric fields, Phys. Rev. D 111, 116005 (2025).

[8] N. Z. Chen, Orkash Amat, L. N. Hu, H. H. Fan, and B. S. Xie,  Asymmetric pulse effects on pair production in chirped electric fields, Phys. Rev. D 109, 076015(2024).

[9] Li-Na Hu, Orkash Amat, Li Wang, Adiljan Sawut, Hong-Hao Fan, and B. S. Xie,  Momentum spirals in multiphoton pair production revisited, Phys. Rev. D 107, 116030 (2023).

[10] Li-Na Hu, Orkash Amat, Lie-Juan Li, Melike Mohamedsedik, and B. S. Xie, Pair production in inhomogeneous electric fields with phase modulation. Commun. Theor. Phys. 75, 025102 (2023).

[11] J. Bai, Z. Chen, Orkash Amat, and M. A. Bake, Electron spin polarization around magnetic nodes under the chirped rotating electric field, Phys. Rev. A 111, 052815 (2025).

[12] L. N. Hu, H. H. Fan, Orkash Amat, S. Tang, and B. S. Xie. Spin Effect induced Momentum Spiral and Asymmetry Degree in Pair Production, Phys. Rev. D 110, 056013 (2024).

[13] Melike Mohamedsedik, Lie-Juan Li, Li Wang, Orkash Amat, Li-Na Hu, and B. S. Xie. Phase effect and symmetry on pair production in spatially inhomogeneous frequency chirping electric fields, Eur. Phys. J. Plus 138, 316 (2023).

[14] N. Nurmamat, Y. F. Huang, X. F. Dong, C. R. Hu, Orkash Amat et al. A Statistical Analysis of Fluence and Energy Distributions of Non-repeating Fast Radio Bursts Detected by CHIME, Mon. Not. Roy. Astron. Soc. 545, staf2148 (2025).

[15] C. R. Hu, Y. F. Huang, L. Cui, H. Zhang, J. T. Li, L. Ji, J. J. Geng, Orkash Amat et al. Magnetic Reconnection as a Potential Driver of X-Ray Variability in Active Galactic Nuclei, Astrophys. J. 992, 82 (2025).

[16] X. F. Dong, Y. F. Huang, Z. B. Zhang, J. J. Geng, C. Deng, Z. C. Zou, C. R. Hu, and Orkash Amat, A Statistical Study of the Gamma-Ray Burst and Supernova Association, Astrophys. J. 993, 20 (2025).

Projects (as Principal Investigator):

1. Project Title: Generation of High-Energy Vortex Particles in Ultra-Strong Electromagnetic Fields and Their Applications in Strange Quark Stars
Funding Agency: National Natural Science Foundation of China (NSFC), Theoretical Physics Special Program
Grant Number: 12447179
Duration: January 2025 – December 2025
Funding Amount: 180,000 CNY
Status: Completed (Principal Investigator)

2. Project Title: Application of the Generalized Quantum Two-Level Model in Gravitational Atoms
Funding Agency: China Postdoctoral Science Foundation, General Program
Grant Number: 2025M783225
Duration: January 2026 – December 2027
Funding Amount: 80,000 CNY
Status: In Progress (Principal Investigator)