Measurement of Boltzmann constant using superconducting integrated circuit

We have performed measurement of the Boltzmann constant k by Johnson noise thermometry (JNT) using an integrated quantum voltage noise source (IQVNS). IQVNS implemented on a single chip generates calculable pseudo white noise voltages. We have accumulated numerous data of the measurements at the temperature of the triple point of water. At the moment the obtained values of k shows significant difference from the 2014 CODATA value of the order of a few parts in 10
⁵
.