Zobrazeno 1 - 10
of 4 422
pro vyhledávání: '"LI, Z. L."'
The momentum distributions of electron-hole (EH) pair production in graphene for two arbitrarily polarized electric fields with a time delay are investigated employing a massless quantum kinetic equation and compared with the results obtained in elec
Externí odkaz:
http://arxiv.org/abs/2410.15313
Autor:
Yang, Y., Chen, X. T., Li, Z. L., Pan, J. B., Jing, F., Zhang, S. S., Wang, X. B., Luo, J. L.
Publikováno v:
Phys. Rev. B 109, 174309 (2024)
We investigate the ultrafast carrier and phonon dynamics in the ferrimagnetic semiconductor Mn$_3$Si$_2$Te$_6$ using time-resolved optical pump-probe spectroscopy. Our results reveal that the electron-phonon thermalization process with a subpicosecon
Externí odkaz:
http://arxiv.org/abs/2405.11737
The nonadiabatic quantum Vlasov equation in spinor QED is derived, and its relation to the well-known adiabatic one is established by three methods. One is by an explicitly analytical expression, the second is by the Dirac equation in the V gauge, an
Externí odkaz:
http://arxiv.org/abs/2403.10870
The backreaction effect and plasma oscillation in pair production for rapidly oscillating electric fields are investigated by solving quantum Vlasov equation. Contrary to previously thought, it is found that the backreaction effect can be neglected i
Externí odkaz:
http://arxiv.org/abs/2301.04026
The effects of control fields on the energy spectra and the number of created pairs and the information transmission by the Dirac vacuum modes are investigated by employing computational quantum field theory approach. It is found that the oscillation
Externí odkaz:
http://arxiv.org/abs/2212.11448
Publikováno v:
Phys. Rev. D 103, 116018 (2021)
We first demonstrate theoretically that the computational quantum field theory is equivalent to the quantum kinetic theory for pair creation in a spatially homogeneous and time-dependent electric field, then verify numerically their equivalence for p
Externí odkaz:
http://arxiv.org/abs/2106.04236
Akademický článek
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Publikováno v:
Phys. Rev. D 100, 076018 (2019)
The momentum spectrum and number density of created bosons for two types of arbitrarily polarized electric fields are calculated and compared with those of created fermions, employing the equal-time Feshbach-Villars-Heisenberg-Wigner formalism which
Externí odkaz:
http://arxiv.org/abs/1908.10556
Publikováno v:
Phys. Rev. D 101, 016008 (2020)
The momentum spectrum and the number density of created electron-positron pairs in a frequency modulated laser field are investigated using quantum kinetic equation. It is found that the momentum spectrum presents obvious interference pattern. This i
Externí odkaz:
http://arxiv.org/abs/1908.08189
Autor:
Rao, Z. -C., Li, H., Zhang, T. -T., Tian, S. -J., Li, C. -H., Fu, B. -B., Tang, C. -Y., Wang, L., Li, Z. -L., Fan, W. -H., Li, J. -J., Huang, Y. -B., Liu, Z. -H., Long, Y. -W., Fang, C., Weng, H. -M., Shi, Y. -G., Lei, H. -C., Sun, Y. -J., Qian, T., Ding, H.
Publikováno v:
Nature 567, 496-499 (2019)
In condensed matter systems, chiral topological nodes are robust band crossing points in momentum space that carry nonzero Chern numbers. The chirality is manifested by the presence of surface Fermi arcs connecting the projections of nodes with oppos
Externí odkaz:
http://arxiv.org/abs/1901.03358