We consider the Melvin Twist of AdS 5 × S 5 under U(1) × U(1) isometry of the boundary S 3 of the global AdS 5 geometry and identify its field theory dual. We also study the thermodynamics of the Melvin deformed theory.
Mechanically hard and broadband gradient refractive index antireflection coating was developed. It has a high damage threshold of ≳6 J/cm2 at 355 nm and 12–13 J/cm2 in the visible to near-infrared region. It will be applicable to high power pulsed lasers as well as to industrial uses.
Theoretical interpretation of damage formation in coated optical glasses is given and its low damage threshold is found to be due to the energy confinement in a narrow gap between the glass substrate and the coated material. The experiments supporting this mechanism are conducted with noncoated, hard-coated, and porous-coated glasses.
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