Observation of the Sliding Phase in $^8^7$Rb

We present observations of the sliding phase in disordered ultracold $^{87}$Rb. For systems with \emph{a,b,c} axis, and 1D disorder along \emph{c}-axis, the sliding phase is when ``\emph{c}-axis superfluid response disappears, while the system remains superfluid in the \emph{a} and \emph{b} directions'' \footnote{ David Pekker \emph{et} \emph{al.}, \textbf{Phys. Rev Lett.}, 105:085302, 2010}. We generate the sliding phase potential using a disordered optical lattice generated by our high-bandwidth arbitrary lattice apparatus. Our findings show three phase crossover regimes at distinct temperatures, which compares favourably to theoretical predictions$^($\footnote{Ibid.}$^,$\footnote{Priyanka Mohan \emph{et} \emph{al.}, \textbf{Phys. Rev Lett.}, 105:085301, 2010}$^,$\footnote{Nicolas Laflorencie, \textbf{EPL}, 99, 2012}$^)$. In addition, we present data suggesting the presence of a Griffiths phase.