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Phase shifter based on an ultrathin superconducting bilayer with a through-hole for a superconducting device
- Source :
- Physica C: Superconductivity and its Applications. 595:1354029
- Publication Year :
- 2022
- Publisher :
- Elsevier BV, 2022.
-
Abstract
- Applying a radian phase shift other than 2π is a key issue for superconducting circuits, such as flux qubits. The magnetic flux is useful when generating a phase shift. However, a quantized magnetic flux accompanying a trapped vortex in a superconductor does not have a phase shifter function. The magnetic flux generated by an external field generates noise. In this study, we propose a phase bias system that does not require an external field during operation. We confirm the phase shift of a direct current superconducting interference device (SQUID) placed on an ultrathin superconducting Nb bilayer with a through-hole by cooling it to a temperature below the superconducting transition temperature with an external field. Although the cause of the phase shift in our system is unclear, we believe that it may be caused by a fractional quantum in the bilayer. When the SQUID is replaced by a qubit, the phase shift can be applied to a phase bias.
Details
- ISSN :
- 09214534
- Volume :
- 595
- Database :
- OpenAIRE
- Journal :
- Physica C: Superconductivity and its Applications
- Accession number :
- edsair.doi.dedup.....a53e8599617b3137bc291d0ea1eb3fb1
- Full Text :
- https://doi.org/10.1016/j.physc.2022.1354029