Electronepositron pair production due to the decay of vacuum in ultrastrong laser fields is an interesting topic which is revived recently because of the rapid development of current laser technology.The theoretical a...Electronepositron pair production due to the decay of vacuum in ultrastrong laser fields is an interesting topic which is revived recently because of the rapid development of current laser technology.The theoretical and numerical research progress of this challenging topic is reviewed.Many new findings are presented by different approaches such as the worldline instantons,the S-matrix theory,the kinetic method by solving the quantum Vlasov equation or/and the real-time DiraceHeisenbergeWigner formalism,the computational quantum field theory by solving the Dirac equation and so on.In particular,the effects of electric field polarizations on pair production are unveiled with different patterns of created momentum spectra.The effects of polarizations on the number density of created particles and the nonperturbative signatures of multiphoton process are also presented.The competitive interplay between the multiphoton process and nonperturbation process plays a key role in these new findings.These newly discovered phenomena are valuable to deepen the understanding of pair production in complex fields and even have an implication to the study of strong-field ionization.More recent studies on the pair production in complex fields as well as beyond laser fields are briefly presented in the view point of perspective future.展开更多
Laser Compton light sources are potential candidates for the next generation of high-brightness X or γ-ray sources. When increasing the laser power to obtain intense X-ray laser, nonlinear Compton scattering happens....Laser Compton light sources are potential candidates for the next generation of high-brightness X or γ-ray sources. When increasing the laser power to obtain intense X-ray laser, nonlinear Compton scattering happens. Nonlinear Compton scattering of linearly polarized laser beam is discussed in this paper. A complete transition probability formula is introduced and the polarization properties of final photons are discussed for different conditions.展开更多
In both the canonical ensemble and grand canonical ensemble,the thermodynamic stability and phase structure of Einstein-Euler-Heisenberg-AdS black holes are studied.We derive the Hawking temperature,Helmholtz free ene...In both the canonical ensemble and grand canonical ensemble,the thermodynamic stability and phase structure of Einstein-Euler-Heisenberg-AdS black holes are studied.We derive the Hawking temperature,Helmholtz free energy,Gibbs potential,entropy and heat capacity of the black holes.We compute the minimum temperature to find that a phase transition may happen at the lowest point.The entropy-temperature diagram consists of two parts.The upper part belonging to the large black holes under the influence from the electromagnetic self-interactions keeps the positive heat capacity,leading the huge compact objects to survive.The lower curves corresponding to small black holes show that the heat capacity of the tiny black holes is negative,which means that the nonlineareffect-corrected smaller sources will evaporate.The further discussions show that the nonlinear effect modifies the thermodynamic quantities,but the corrections limited by the nonlinear factorμwith allowed values can not change the properties and the phase structure fundamentally and thoroughly.We argue that the influence from self-interaction can not make the Einstein-Euler-Heisenberg-AdS black holes to split under the second law of thermodynamics.展开更多
基金This work was supported by the National Natural Science Foundation of China(NSFC)under Grant Nos.11475026,11175023also supported partially by the Open Fund of National Laboratory of Science and Technology on Computational Physics at IAPCM and the Fundamental Research Funds for the Central Universities(FRFCU).
文摘Electronepositron pair production due to the decay of vacuum in ultrastrong laser fields is an interesting topic which is revived recently because of the rapid development of current laser technology.The theoretical and numerical research progress of this challenging topic is reviewed.Many new findings are presented by different approaches such as the worldline instantons,the S-matrix theory,the kinetic method by solving the quantum Vlasov equation or/and the real-time DiraceHeisenbergeWigner formalism,the computational quantum field theory by solving the Dirac equation and so on.In particular,the effects of electric field polarizations on pair production are unveiled with different patterns of created momentum spectra.The effects of polarizations on the number density of created particles and the nonperturbative signatures of multiphoton process are also presented.The competitive interplay between the multiphoton process and nonperturbation process plays a key role in these new findings.These newly discovered phenomena are valuable to deepen the understanding of pair production in complex fields and even have an implication to the study of strong-field ionization.More recent studies on the pair production in complex fields as well as beyond laser fields are briefly presented in the view point of perspective future.
基金Supported by National Natural Science Foundation of China (10935011)Marjor State Basic Research DevelopmentProgram of China (2002CB713600)
文摘Laser Compton light sources are potential candidates for the next generation of high-brightness X or γ-ray sources. When increasing the laser power to obtain intense X-ray laser, nonlinear Compton scattering happens. Nonlinear Compton scattering of linearly polarized laser beam is discussed in this paper. A complete transition probability formula is introduced and the polarization properties of final photons are discussed for different conditions.
基金Supported partly by the Shanghai Key Laboratory of Astrophysics(8DZ2271600)。
文摘In both the canonical ensemble and grand canonical ensemble,the thermodynamic stability and phase structure of Einstein-Euler-Heisenberg-AdS black holes are studied.We derive the Hawking temperature,Helmholtz free energy,Gibbs potential,entropy and heat capacity of the black holes.We compute the minimum temperature to find that a phase transition may happen at the lowest point.The entropy-temperature diagram consists of two parts.The upper part belonging to the large black holes under the influence from the electromagnetic self-interactions keeps the positive heat capacity,leading the huge compact objects to survive.The lower curves corresponding to small black holes show that the heat capacity of the tiny black holes is negative,which means that the nonlineareffect-corrected smaller sources will evaporate.The further discussions show that the nonlinear effect modifies the thermodynamic quantities,but the corrections limited by the nonlinear factorμwith allowed values can not change the properties and the phase structure fundamentally and thoroughly.We argue that the influence from self-interaction can not make the Einstein-Euler-Heisenberg-AdS black holes to split under the second law of thermodynamics.
