中国物理B ›› 2018, Vol. 27 ›› Issue (1): 14201-014201.doi: 10.1088/1674-1056/27/1/014201

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Birefringence via Doppler broadening and prevention of information hacking

Humayun Khan, Muhammad Haneef, Bakhtawar   

  1. Laborotary of Theoretical Physics, Department of Physics, Hazara University Mansehra, KP, Pakistan
  • 收稿日期:2017-08-03 修回日期:2017-09-12 出版日期:2018-01-05 发布日期:2018-01-05
  • 通讯作者: Muhammad Haneef E-mail:haneef.theoretician@gmail.com

Birefringence via Doppler broadening and prevention of information hacking

Humayun Khan, Muhammad Haneef, Bakhtawar   

  1. Laborotary of Theoretical Physics, Department of Physics, Hazara University Mansehra, KP, Pakistan
  • Received:2017-08-03 Revised:2017-09-12 Online:2018-01-05 Published:2018-01-05
  • Contact: Muhammad Haneef E-mail:haneef.theoretician@gmail.com

摘要: We propose a new scheme for the coherent control of birefringent light pulses propagation in a four-level atomic medium. We modify the splitting of a light pulse by controlling the electric and magnetic responses. The Doppler broadening effect is also noted on the propagation of the birefringent pulses. The dispersions of the birefringence beams are oppositely manipulated for delay and advancement of time at a Doppler width of 10γ. A time gap is created between the birefringence beams, which protects from hacking of information. The time gap is then closed to restore the pulse into the original form by a reverse manipulation of the dispersion of the birefringence beams, i.e., introducing another medium whose transfer function is the complex conjugate of that of the original medium. The results are useful for secure communication technology.

关键词: birefringence, Doppler broadening, time gap, hacking

Abstract: We propose a new scheme for the coherent control of birefringent light pulses propagation in a four-level atomic medium. We modify the splitting of a light pulse by controlling the electric and magnetic responses. The Doppler broadening effect is also noted on the propagation of the birefringent pulses. The dispersions of the birefringence beams are oppositely manipulated for delay and advancement of time at a Doppler width of 10γ. A time gap is created between the birefringence beams, which protects from hacking of information. The time gap is then closed to restore the pulse into the original form by a reverse manipulation of the dispersion of the birefringence beams, i.e., introducing another medium whose transfer function is the complex conjugate of that of the original medium. The results are useful for secure communication technology.

Key words: birefringence, Doppler broadening, time gap, hacking

中图分类号:  (Birefringence)

  • 42.25.Lc
42.25.Kb (Coherence) 42.50.-p (Quantum optics)