Fig. 1: The spinwave Ising machine (SWIM).
From: A spinwave Ising machine
a Schematic of the SWIM with a Yttrium Iron Garnet (YIG) waveguide on Gadolinium Gallium Garnet (GGG) substrate, peripheral microwave components described in the text, and a real-time oscilloscope for direct studies of the time-evolution of all spins; couplings between spins are implemented using three delay cables of different lengths. b Measurement of the S21 of the YIG delay line showing the spinwave spectrum. Δf = 60 MHz is the spinwave spectral bandwidth measured at -3 dB. c The frequency-dependent delay time of the YIG delay line. τdelay = 271 ns is the average delay time over Δf with a total deviation of Δτdelay = 30 ns. d Amplification of the parametric phase-sensitive amplifier as a function of the relative phase between the propagating RF pulses and the reference signal ωref = 6.25 GHz, with a phase sensitivity of APSA = 6.1 dB.
