I read on Brents blog that this is possible.
Can you post a link to this blog post? I would be very interesting in reading it. I tried to find it on his blog but couldn't... there doesn't seem to be a search option.
Cheers
Edit: nevermind I think I found it
here. Here is what I read, just for the sake of discussion. Interesting, Brent says you can even just stick them right in the fridge without any preparation... but that is not ideal.
How to Give Plants a Dormant Period From Evergreen Gardenworks
It is not easy, but some people have become adept at growing temperate plants indoors by giving them a dormant period each year. This can be done by keeping plants in the refrigerator, in a cold garage, or outside until the dormancy requirements are met. The plants are then brought back into the house and growth is reinitiated by providing warmer temperatures and increased daylength with grow lights. This is not a procedure for beginners, and if you wish to try it, expect failures until you learn the proper techniques and the eccentricities of each species.
If, for some reason, you cannot keep your temperate plants outside all winter to give them a dormant period, here is how you can do it can do it in the refrigerator: First (if possible), keep them outside and let them enjoy a few light frosts. Ideally, four to six weeks of decreasing day length and mild cool weather where the temps are around 25 to 35F at night, will adequately prepare them. If this is not possible, just keep them as cool as possible as late as possible in the fall, and then put them in the fridge. The above preparation is not strictly necesary, but it does keep them healthier and minimizes the refrigerator period. Going directly from a growing state (AFTER a full season of growth) into cold storage will not adversely affect any temperate climate plant. They will just go dormant in the fridge, drop their leaves, etc.
Some precaution against drying out in the fridge must be taken, especially in modern frost free refrigerators. You can wrap them loosely with plastic, but do allow some circulation. Take them out weekly and check to see if they need watering. They still must be watered normally when they begin to dry out. Light is not necessary as long as the temperature is low, about 35F or lower. If you have the option, keep the temperature hovering just above freezing, it will minimize fungal problems.
As a minimum, keep them in the fridge for six weeks, longer is fine. After six weeks, they will have the 1000 hours of chill considered necessary for most temperate climate plants. You can then take them out and return them to growing conditions. This may be inside, but please read the articles on growing indoors. This will almost certainly mean good air circulation, grow lights, and added humidity such as a growing chamber or small greenhouse.
In the beginning, it is far more important to learn how to properly water, prune, fertilize, and repot your tropical bonsai than it is try to manipulate the dormant period of temperate climate species.