Basic Cells for Reconfigurable Superconducting Kinemonics

Area of Science:

• Superconducting electronics
• Quantum computing hardware

Background:

• All-Josephson-junction (all-JJ) logic offers compact cell areas due to Josephson junction sizes.
• Tunable kinetic inductance presents an opportunity for circuit reconfigurability and further scaling in all-JJ circuits.

Purpose of the Study:

• To introduce reconfigurable superconducting "kinemonics" utilizing tunable kinetic inductances.
• To demonstrate a universal programmable logic cell capable of realizing all sixteen two-input Boolean functions.

Main Methods:

• Development of basic cells for reconfigurable kinemonics using multilayer nanostructures with tunable kinetic inductance.
• Integration of these gates into a universal programmable logic cell with a tunable kinetic-inductance key.

Main Results:

• Demonstration of a universal programmable logic cell realizing all sixteen two-input Boolean functions, functioning as a reconfigurable look-up table.
• Exploration of tunable kinetic inductance for control in superconducting neuromorphic circuits, including routing and coincidence detection.

Conclusions:

• Tunable kinetic inductance enables highly compact and reconfigurable superconducting circuits.
• The presented kinemonics principles are applicable to both general-purpose programmable logic and specialized superconducting neuromorphic circuits.