Grandfather Paradox

Grandfather Paradox Goldy Landau

What if you could travel in time?

Einstein’s Theories of Relativity

•Space and time are linked,•Gravity changes time

•SR: Traveling to future is simple •Time Machine near speed of light

•GR: Equations say it’s possible to travel to past, but difficult.

Grandfather Paradox

Video

Solutions

Garden of Forking Paths

Harry Potter

Groundhog Day

Einstein was wrong

Many Worlds Interpretation

Universe splits at point of killing Grandfather/When enters time machine

Alternate universe created

Garden of the Forking Paths

Novikov Self-Consistency Principle

If one were to go back in time it would be impossible to erase their own existence.

Grandfather dodges bullet

Story becomes part of history.

The universe continues as it should.

Prisoner of Azkaban

Harry Potter saved himself from a Dementor attack. Hermione takes more classes Hermione sees an earlier version of herself from Hagrid’s windowHarry Potter is always saved and Hermione’s class schedule always works out

Closed Time-like Curve

Time is looped like Groundhog Day

Within black hole

Take grandfather with you

Deleted from history of original universe

Einstein Was Wrong!!

General Relativity is wrong..

“The dimension of time has been shattered; we cannot love or think except in fragments of time each of which goes off along its own trajectory and immediately disappears.”

And as well, I say, this might be the time when I can convince myself that all my pasts are burned and forgotten, as if they had never existed.

-Italo Calvino, If on a Winter’s Night a Traveler