the interacting vortex lines that are introduced into the system by the application of an external magnetic field.[@Tinkham] In the high temperature copper-oxide superconductors such as YBCO and BSCCO, material parameters such as high anisotropy, as well as the high transition temperatures, cause thermal fluctuations to play an important role. Such materials are also believed, even in the purest of single crystal samples, to contain quenched, intrinsic, uncorrelated, random point impurities that can pin vortex lines. The resulting phase diagram as a function of temperature and applied magnetic field is generally believed to result from such a combination of thermal fluctuations and random point pinning.[@Blatter] It was later argued that similar fluctuation effects can be observed even in single crystal samples of more familiar strong type-II low temperature superconductors[@Paltiel; @Ling; @Banerjee; @Marchevsky; @Pasquini] such as Nb and NbSe$_2$, albeit over a much more restricted region of the phase diagram. It has been argued that a universal phase diagram might apply to all strong type-II superconductors.[@Menon]

Considerable experimental effort has been devoted to the determination of this vortex line phase diagram. [@Worthington; @Liang; @Schilling; @Khaykovich; @Nishizaki; @Bouquet; @vanderBeek; @Gaifullin; @Avraham; @Radzyner; @LiWen; @Beidenkopf; @Beidenkopf2; @Petrean; @Andersson; @Strachan; @Strachan2; @Shibata; @Soibel] It 