Are there electronic/active theft deterrents for bicycles?
You can get GPS trackers for bikes, just like cars and motorbikes. The good ones warn you immediately when your bike starts moving (eg via text message to your phone) and you can see where it is on a map for recovery (you might want to call the police rather than tackle thieves yourself). Of course the downside to GPS trackers is than they stop working if the bike is put in the back of a van.

A google search should give you plenty of results.