Fig. 2: Interference at elevated T.

a Interference at ν = 1/3 at a mixing chamber temperature of 50 mK. Interference is still of reasonable amplitude, and a few of the discrete jumps in the center are still visible, but the Φ0 modulations are only weakly visible. b Interference at 90 mK. The Φ0 modulations are completely washed out, and the interference amplitude in the low and high field regions are greatly reduced.