Warning: attempting to close a micro wormhole can result in catastrophic consequences, including but not limited to:
Disclaimer: the following steps have been known to cause spontaneous combustion in 3 out of 5 users.
Step 1.5: Consult the ancient tomes of forbidden knowledge (aka your physics textbook).
Understand that wormholes are stable only in the presence of exotic matter.
Understand that you don't have any exotic matter.
Understand that you're in over your head.
Continue to Step 3: Pray to the Quantum Gods