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Superconducting qubits consisting of epitaxially grown NbN/AlN/NbN Josephson junctions.
- Source :
-
Applied Physics Letters . 11/21/2011, Vol. 99 Issue 21, p212502. 3p. 1 Diagram, 2 Graphs. - Publication Year :
- 2011
-
Abstract
- We demonstrate superconducting qubits using epitaxially grown Josephson junctions. A fully epitaxial NbN/AlN/NbN trilayer on MgO (100) substrate is processed by photolithography and dry-etching into transmon qubits with a large Josephson energy. The tunnel barrier made of cubic-phase AlN, rather than the ordinary hexagonal phase, is the key to avoid piezoelectric coupling to the phonon bath. The energy-relaxation time and the spin-echo decay time of ∼500 ns are observed in the qubits that are coupled to a monolithically made coplanar waveguide resonator. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 99
- Issue :
- 21
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 67462684
- Full Text :
- https://doi.org/10.1063/1.3663539