The interests to join LCGT

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The interests to join LCGT
Xiang-Hua Zhai ??? zhaixh_at_shnu.edu.cn Shanghai
United Center for Astrophysics(SUCA), Shanghai
Normal University
2011.02.05. ICRR
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Motivation

• Last summer, Prof. Wei-Tou Ni joined SUCA,
  Shanghai Normal University
• Prompted by Prof. Ni, some colleagues are
  discussing possible participation in the LCGT
  project.
• I am interested in the quantum scheme of LCGT

2011.02.05. ICRR
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Quantum noise in LCGT

• The sensitivity of LCGT is limited by the quantum
  noise shot noise and radiation-pressure noise
• Shot noise is relating to input laser power
• Radiation-pressure noise arises from the
  quantization of the electromagnetic field
• The optimal sensitivity SQL can be reached for a
  given frequency where shot noise and radiation
  pressure become equal by choosing the best light
  power

2011.02.05. ICRR
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My interests

• QND study obtaining a sensitivity better than
  the SQL
• Squeezed light plays a key role in increasing the
  sensitivity without increasing the laser power
  and enabling the cryogenic cooling of the
  interferometer
• Optomechanical coupling between radiation
  pressure and mirror motion
• The effect of the GW is transduced onto the
  motion of a mirror through optomechanical
  coupling and then detected by measuring the local
  motion
• The quantum fluctuations in the power of the
  beams impinging on the mirrors lead to real
  mirror displacements having the same effect as
  that of a gravitational wave.
• reading relevant papers and preparing myself to
  do works towards the above topics.
• included in the collaborator list of the proposal
  Quantum noise analysis and QND study for LCGT
  applied by Prof. Somiya.

2011.02.05. ICRR
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My research

• Research experience
• nonlinear optical property of polymer films
• Topological defects in early universe
• Dark energy
• Casimir effect
• 39 papers published
• Supported by NSFC and Shanghai government and
  SHNU

2011.02.05. ICRR
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Part of Publications(1)

• Xiang-hua Zhai, Xin-zhou Li, Chao-Jun Feng, The
  Casimir force of Quantum Spring in the
  (D1)-dimensional spacetime, Mod. Phys. Lett.
  A,2011.
• Xin-zhou Li, Hong-bo Cheng, Jie-ming Li,
  Xiang-hua Zhai, Attractive or repulsive nature of
  Casimir force for rectangular cavity.
  Phys.Rev.D562155-2162,1997.
• Xiang-hua Zhai, Xin-zhou Li, Casimir pistons with
  hybrid boundary conditions.Phys.Rev.D76047704,20
  07.
• Xin-zhou Li, Xiang-hua Zhai, The Tachyon
  inflationary models with exact mode functions.
  Phys.Rev.D67067501,2003.
• Xiang-hua Zhai, Yan-yan Zhang, Xin-zhou Li,
  Casimir Pistons for Massive Scalar Fields.
  Mod.Phys.Lett.A24393-400,2009.
• Xiang-Hua Zhai, You-Dong Xu, Xin-Zhou Li, Viscous
  generalized Chaplygin gas. Int.J.Mod.Phys.D151151
  -1162,2006. Xin-Zhou Li, Xiang-Hua Zhai, Fermion
  stars with a global monopole.Phys.Lett.B364212-2
  15,1995.
• Xiang-hua Zhai, Yi-bin Zhao, Dynamics of
  quintessential inflation. Chin.Phys.152465,2006.

2011.02.05. ICRR
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Part of Publications (2)

• Xin-zhou Li, Xiang-hua Zhai, and Guang Chen,
  Boson D-stars.Astropart.Phys.13245-252,2000.
• Xin-zhou Li, Ping Xi, Xiang-hua Zhai,
  Quintessential matter surrounding a global
  monopole. Phys.Lett.B666125-130,2008.
• Xin-zhou Li, Xiang-hua Zhai, Rigorous proof of
  attractive nature for Casimir force of p odd
  hypercube. J.Phys.A.,A3411053-11057,2001.
• Xin-Zhou Li, Jian-Gang Hao, Dao-Jun Liu,
  Xiang-Hua Zhai, On the quintessence with Abelian
  and non-Abelian symmetry. Int.J.Mod.Phys.A185921,
  2003.
• Xiang-hua Zhai, Yi-bin Zhao, A Cosmological model
  with complex scalar field. Nuovo
  Cim.B1201007-1016,2005
• Chiang-Mei Chen, Hong-Bo Cheng, Xin-Zhou Li,
  Xiang-Hua Zhai, Non-existence of topological
  defects during inflation beyond the critical
  value.Class.Quant.Grav.13701-704,1996.
• X. H. Zhai, Repulsive Casimir force, realizable
  or not? Proceedings of the Ninth Asia-Pacific
  International Conference on Gravitation and
  Astrophysics, P327, World Scientific, 2010.

2011.02.05. ICRR
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Thanks
2011.02.05. ICRR