Quantum lock

A quantum lock is a seal in reality which prevents anyone from time-traveling into or out of a region of spacetime. It nullifies attempts to alter history and can be utilized to safeguard valuable objects. Quantum-locking anything requires extremely advanced knowledge and capabilities of physics.

Fiction

Fun Publications

When Megatronus, rogue member of the Thirteen, sought the all-powerful Star Saber for his evil cause, his siblings resolved to keep the weapon out of his hands. To this end, Solus Prime split the Saber into five pieces, with the hilt, the Origin Matrix being hidden on prehistoric Earth of Primax -408.24 Epsilon. Vector Prime quantum-locked this sector of history to prevent anyone from reaching the Matrix. Ask Vector Prime, 2015/05/18

Eons later, however, the lock was weakened when critical universe Primax 207.0 Epsilon was destroyed, triggering malignant effects across the multiverse. This included bouncing two starships from the unraveling universe into the prehistoric era of Primax -408.24 Epsilon. The Transcendent Technomorphs of Nexus 208.0 Epsilon observed this happening and in order to safeguard the multiverse, they recruited morally trustworthy bounty hunter Depth Charge to secure the Matrix. Invasion: Epilogue

Beast Wars: Uprising

The inhabitants of the Human Confederacy quantum locked Earth some time prior to the 24th century. Upon learning that a dimension hopper had precipitated civil war on Cybertron, CTCF officer Una commented that the Terrans should have also quantum locked Cybertron as with Earth, but her colleague Chak pointed out the unfeasibility of such a task, citing Cybertron's vastly greater history of higher order life. Intersectionality