|
Basic understanding of the quantum flux parametron: The basic operation of a QFP circuit was studied. Good agreement was obtained, confirming the possibility of QFP applications as a very fast switching device.
16-Ghz operation of the QFP: It was demonstrated that QFP circuits can operate at a 16-GHz clock, 4 phase, equivalent to 64 GHz, as compared to 1 GHz of the fastest conventional Josephson junction devices.
New-type logic circuit based on quantum flux: Progress was made in defining a new-type of logic circuit based on quantum flux. Operation was experimentally ascertained on the elementary unit of a larger circuit. Logic design for a 4 x 4 multiplier was established using 64 x 30 (about 2,000) QFPs.
Three-dimensional QFP chip arrays: Theoretical groundwork has been laid for constructing three-dimensional arrays of QFP chips, as opposed to semiconductor devices which can only be built in two dimensions.
New architecture for a Josephson computer: A new computer architecture which is well suited for a Josephson computer, called a Cyclic Pipeline Architecture (CPA) and implementing a MIMD (multiple instruction stream multiple data) architecture, was developed.
New view of information theory: Theoretical calculations involving QFP devices have shown that it is possible to handle information in QFP circuits without heat generation and, therefore, entropy, if the circuit is running at a sufficiently slow clock.
New refrigerator for the QFP computer: The construction of a compact and reliable helium refrigerator for a QFP computer was realized.
|
) is quantized (the smallest unit of magnetic flux generated by a current in a superconducting circuit). This project explored the possibility of realizing an ultra-fast computer using magnetic quanta as units of operation involving data handling.
