Experimental analysis of phase-mode Josephson digital circuits

K. Nakajima, H. Sugahara, A. Fujimaki, Y. Sawada

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


We present experimental results on elementary phase-mode Josephson circuits whose combinations enable us to construct a total data processing system which is expected to be superior to the ordinary voltage-mode Josephson computer in several respects. In the phase-mode system a device depends for its operation on the existence of many stable states differing from one another by integer multiples of 2π in the phase plane. The total system is considered to be a prototype of quantum computer systems where physical quantum states are employed as logic states of information processing. By using the fabricated elementary circuits composed of SQUIDs and two types of branching points we have experimentally confirmed and, fan-out, fan-in operations, etc. We have also proposed an inhibit circuit, and presented the experimental results on the inhibit circuit.

Original languageEnglish
Pages (from-to)949-955
Number of pages7
JournalJournal of Applied Physics
Issue number2
Publication statusPublished - 1989

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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