More quantum mechanics terms were introduced in #Alice ep 6, the Chronology Protection Conjecture, Dirac Sea, and one of the most famous thought experiments, the Schrodinger's Cat.

All these were used to support the Alice storyline. Expand this thread for more!

#kdrama #앨리스

Stephen Hawking's Chronology Protection Conjecture is a theory that states that time travel is impossible as the universe will act in a way to protect itself and its history, i.e. Future Universe A cannot change Past Universe A.

Does Alice defy the Chronology Protection Conjecture then?

No. As Alice operates in a multiverse, a person from Future Universe A can only affect events from other past universes. In this way the history of Universe A is shielded from Universe A itself, upholding the conjecture.

So the writers are basically telling us, the viewers, that time travel in Alice does not break any fundamental theories such as the Chronology Protection Conjecture, Grandfather Paradox, Heisenberg Uncertainty Principle and etc., thanks to the parallel universes that they use.

An additional information that they provided in ep 6 was the Dirac Sea, which is basically a sea of negative energy particles. Why did the writers mention this point though?

Well, it is used to substantiate the mention of wormholes in Alice's time travelling.

To time travel in Alice, it requires the use of traversable wormholes (time travelling in both directions), and in order to sustain a traversable wormhole, negative energy is required. Otherwise, the wormhole will collapse before anything can pass through it.

So the Chronology Protection Conjecture & Dirac Sea merely serves the writers' objective of telling us that time travelling is possible due to the parallel universe setting, and the use of traversable wormholes, sustained by negative energy.

But what about the Schrodinger's Cat?

The Schrodinger's Cat is a famous thought experiment that shows that if you put a cat in a box with a radioactive atom that has a 50% probability of decaying. After a while, the cat will be both alive and not alive at the same time before you open the box.

This is a weird thought experiment but the main point is that if you repeat this Schrodinger's Cat experiment over 1000 times, in 50% of the experiments the cat will stay alive and in the other 50%, the cat will not.

This of course is a subtle hint at the parallel universes.

Just like Schrodinger's Cat, if you influence an event in one universe, it will split into many universes with multiple outcomes, something Seok Oh Won said in Ep 3.

In short, the Schrodinger's Cat is also used to support the viability of time travel in Alice's multiverse.