1. LIGO Quantum Schemes
NSF Review, Oct. 2007

2. Quantum tricks in the coming decade
Squeezed vacuum injection
Radiation-pressure induced couplings of light with the mechanical oscillator
Squeezed states of light
Entangled states
Squeezed states of mirror
Quantum radiation pressure

3. Squeezed Input Interferometer
Laser
GW Detector
SHG
Faraday isolator
The squeeze source drawn is an OPO squeezer, but it could be any other squeeze source, e.g. ponderomotive squeezer.
OPO
Homodyne Detector
Squeeze
Source
GW Signal

4. Sub-quantum-limited interferometer
Narrowband unsqueezed
Broadband unsqueezed
Broadband Squeezed X+ X-
Quantum correlations
Input squeezing

5. Squeezing injection experiment @ the 40m prototype @ Caltech
Animated. (i) Experimental layout of 40m test; (ii) results
Goda et al. (2007)

6. Squeeze injection in En/AdLIGO
Here is a block diagram of what a practical squeezer for a post-S6 LIGO might look like.
Sigg et al.

7. Radiation pressure effects Classical and quantum
The curves that follow are all for the ponderomotive experiment  a FPMI with 1 gram end mirrors, 1 W of input power, arm cavity finesse of ~1e4. The same effects can exist in Advanced LIGO as well.

8. Classical radiation pressure effects
Stiffer than diamond
6.9 mK
Stable OS
Radiation pressure dynamics
Optical cooling

9. Quantum radiation pressure effects
Entanglement
Squeezing
Mirror-light entanglement
Squeezed vacuum generation