QMET · Quantum Metrology Electrical Triangle
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2021-07-01 → 2023-06-30
- EU contribution
- €184,708
- Participants
- 1
- Scheme
- MSCA-IF
Lines connect the coordinator with its partners.
Results in brief
Quantum Metrology Electrical Triangle
Decades after the definition of quantum voltage and resistance standards, a quantum current standard is missing. This last one turned out to be more challenging than the previous two, and nowadays the current unit is basically given by extremely precise current sources. A standard definition of the Ampere can be obtained exploiting the dual counterpart of the Josephson effect, namely voltage Bloch Oscillations. A way to measure them consists in embedding a largely non-linear Josephson junction in a high impedance environment, irradiate it with a microwave pump to observe discrete DC current steps, the dual of Shapiro steps. The QMET action tackles this objective. Such result would provide a leap in quantum metrology and paves the way to the redefinition of the ampere using only fundamental constants.
Data: CORDIS, © European Union
Project objective
The standard definition of the Ampere can be obtained exploiting the dual counterpart of the Josephson effect, namely voltage Bloch Oscillations (vBO). A way to measure them consists in embedding a largely non-linear Josephson junction in a high impedance environment, irradiate it with a microwave pump, and observe discrete DC current steps. The QMET (Quantum Metrology Electrical Triangle) action tackles this objective by leveraging the researcher demonstrated ability of performing precision microwave measurements devising novel apparatuses and the mastering of the host group in the design and fabrication of high-impedance superconducting circuits. Such result would provide a leap in quantum metrology and paves the way to the redefinition of the ampere using only fundamental constants.
Original text from CORDIS.
Participants
- CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS · ParisCoordinatorFrance
Links
Data: CORDIS, © European Union