Karenowska leads the Quantum Magnonics group, which develops low-temperature microwave magnonic circuits to probe magnon physics at the quantum level. Core experiments are conducted at millikelvin temperatures in a dilution refrigerator. Research foci include: (1) propagating magnon dynamics in YIG waveguides at mK temperatures — measuring spin-wave pulse propagation and characterising the low-temperature ferromagnetic resonance frequency shift; (2) magnon-phonon (phonon-to-magnon) interconversion via magnetoelastic coupling and symmetry breaking in YIG; (3) spin-cat state generation in ferromagnetic insulators — theoretical and experimental work toward macroscopic quantum superposition states of magnons; and (4) magnon spintronics — spin-charge interconversion in YIG/metal heterostructures. These systems are relevant for microwave quantum information processing and quantum-limited magnetic-frequency-band sensing.