At the end of lecture ( from conference "Perspectives on Riemann hypothesis" '18 ) S.J. Patterson mentioned about work done by 'Christa Mirgel' ( University of Gottingen) on one dimensional Schrodinger's operator relating Riemann zeros .
I searched on Google for this work but in vain . ( Found similar profile on LinkedIn but seems he left academia )
So , if anyone has detailed reference about it Please share .
Also , In general is there any serious progress in this direction 'recently'?