  We study the possibility of orbital synchronization capture for a
hierarchical quadrupole stellar system composed by two binaries emitting
gravitational waves. Based on a simple model including the mass transfer for
white dwarf binaries, we find that the capture might be realized for
inter-binary distances less than their gravitational wavelength. We also
discuss related intriguing phenomena such as a parasitic relation between the
coupled white dwarf binaries and significant reductions of gravitational and
electromagnetic radiations.
