Fig. 1: Losses of tantalum resonators.
From: Low-loss superconducting resonators fabricated from tantalum films grown at room temperature
Loss measurements at high power (δhp) and low power in the single-photon regime (δ1ph) (top), and calculated loss induced by two-level systems at one photon (\({\delta }_{tls}^{1ph}={\delta }_{1ph}-{\delta }_{hp}\)) (bottom) as function of resonant frequency for a HT Ta - w = 30 μm, b RT Ta - w = 30 μm, c HT Ta - w = 3 μm, and d RT Ta - w = 3 μm. The medians δ1ph and \({\delta }_{tls}^{1ph}\) of each resonator are indicated by white markers and the median and interquartile range, also reported Table 1, are represented by a horizontal line and a strip, respectively.
