… One goal in quantum metrology is to combine the quantum voltage standard based on the
ac Josephson effect 21 with the quantum resistance standard based on the quantum Hall …

… This output can also be used to generate a balance current I,, which flows in an auxiliary
winding of N, turns of the comparator and is arranged to bring the detector to zero balance. …

… The quantum Hall effect can provide an invariable reference standard of resistance linked to
… the accuracy of practical realizations of quantized Hall resistance standards. Ultimately, the …

… in resistance or impedance bridges, resulting in a balance … resistance with values which
are multiples or submultiples of … quantized Hall resistances (QHRs) and, using a resistance …

… with the CCC, while the voltage drops at the terminals of these two resistors are balanced
11 . At the end, the bridge allows the determination of the ratio γ of two resistances. As in the …

… ac measurement of the quantized Hall resistance is the longitudinal resistance and the …
fn) is the balance one would obtain if there was no dissipation in the quantum Hall device. It …

… First, we consider a quadrature bridge with two cryogenic quantum Hall resistors and a room…
is rejected by the detector combining network because it acts as a balanced filter. To reduce …

… In the quantum anomalous Hall effect, the edge states of a … exhibit quantized Hall resistance
and dissipationless transport at zero magnetic field. Up to now, however, the resistance was …

… This breakthrough also results from the development of resistance … perfectly quantized
Quantum Hall Array Resistance Standards (QHARS) by combining a large number of single Hall …

We have used a quadrature bridge to compare directly two quantum Hall resistors with two
10-nF capacitors at 1233 Hz. This approach eliminates uncertainties due to thermal and …