If you are wanting to get them back laying (though the nature of things is to slow down/stop laying and molt) in these winter months you can do the following. Results will very.
1) Give them a HIGH protein diet (fish, chick starter, canned tuna, mealworms, maybe even some cat food, scrambled eggs ect.). This is the most important part. You may notice that during their molt they will be eating their feathers. That's because they want more protein. Feathers are protein. Gross, I know!
2) Give them some extra day light via putting light in their coop.
Or another option is to forgo all of the above and let them get through their molt on their own and let nature take it's course.