US 12,293,255 B2
Low loss broadband quantum limited Floquet-mode amplifier
Kevin O'Brien, Somerville, MA (US); and Kaidong Peng, Cambridge, MA (US)
Assigned to Massachusetts Institute of Technology, Cambridge, MA (US)
Filed by Massachusetts Institute of Technology, Cambridge, MA (US)
Filed on Nov. 16, 2022, as Appl. No. 17/987,962.
Prior Publication US 2024/0160975 A1, May 16, 2024
Int. Cl. G06N 10/20 (2022.01); G06N 10/60 (2022.01); H01P 3/00 (2006.01); H01P 11/00 (2006.01); H03F 19/00 (2006.01); H10N 60/12 (2023.01)
CPC G06N 10/20 (2022.01) [G06N 10/60 (2022.01); H01P 3/006 (2013.01); H01P 11/006 (2013.01); H03F 19/00 (2013.01); H10N 60/12 (2023.02)] 24 Claims
OG exemplary drawing
 
1. A Floquet mode traveling wave parametric amplifier (TWPA), having an input and an output, comprising:
a circuit having a plurality of stages, wherein each stage comprises a nonlinear element and a capacitor, wherein a critical current of the nonlinear element decreases monotonically from the input to a trough and increases from the trough to the output, wherein the trough is defined as a continuous series of stages wherein each stage in the trough has a critical current within 5% of a minimum critical current, and wherein at least 10% of the stages are in the trough.