Learjet 45
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 100; Flight Crew Total 12500; Flight Crew Type 1000
Inflight Event / Encounter Wake Vortex Encounter; Inflight Event / Encounter Loss Of Aircraft Control
Air Traffic Control Issued New Clearance; Flight Crew Regained Aircraft Control; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Took Evasive Action
Environment - Non Weather Related; Procedure
While on PUFFR4 RNAV arrival for APA; when crossing SLMON fix at FL210; we experienced wake turbulence in our LR-45 violent enough to roll the aircraft 30 degrees left then 30 degrees right in only a couple seconds and forceful enough to cause the autopilot to disconnect. I recognized the issue and reduced our pitch to change profile of our descent. I then asked ATC who we were following and they indicated a B737 10 miles ahead of us. I asked for off the profile and was given vectors and descent south off the arrival with no further incident.  Have had multiple encounters of this type over last couple of years directly associated with 'descend via' clearances on RNAV arrivals which put all aircraft on the same descent profile while crossing fixes at specific altitude windows which I believe is creating dangerous wake turbulence encounters.
Learjet 45 Captain reported experiencing 'violent' wake turbulence on the PUFFR4 RNAV Arrival into APA in trail of a B737.