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Entanglement Across the Universe | Ivette Fuentes

2026-05-28 Education
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Closer To Truth
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Description

*Can the shape of spacetime itself reach into the quantum world?* Ivette Fuentes describes how, in toy models of an expanding universe, particles that started out unentangled end up entangled — hinting that spacetime may shape quantum reality, and that entanglement could interconnect the universe at scales we do not yet understand. 0:00 Why Quantum Cosmology Needs Quantum Gravity 2:05 Entanglement in an Expanding Universe 4:07 A Universe That Is One *Ivette Fuentes* is a Professor of Quantum Physics at the University of Southampton and Emmy Fellow at Keble College, University of Oxford. Her work considers fundamental quantum mechanics, quantum optics and their interplay with general relativity. *More from Ivette Fuentes on Closer To Truth:* * YouTube Playlist Inside a Black Hole: https://www.youtube.com/playlist?list=PLFJr3pJl27pICsUt6s3zsKy_L7LKL0lbE * Closer To Truth The Podcast: https://www.youtube.com/playlist?list=PLFJr3pJl27pLLkP0kHQKL9nZh35UkgkR_ * Website: https://closertotruth.com/contributor/ivette-fuentes/ *Subscribe to Closer To Truth:* https://www.youtube.com/@CloserToTruthTV *Join the Community:* * Membership (5,000+ videos): https://closertotruth.com/register/ * Audio Podcast: https://closertotruth.podbean.com * Support the Show: https://closertotruth.com/donate/ * Official Merchandise: https://www.bonfire.com/store/closertotruth/ *Follow Us:* * Facebook: https://www.facebook.com/CloserToTruthTV/ * Instagram: https://www.instagram.com/closertotruth/ * X: https://x.com/CloserToTruth Closer To Truth, hosted by Robert Lawrence Kuhn and directed by Peter Getzels, presents the world’s greatest thinkers exploring humanity’s deepest questions. Discover fundamental issues of existence. Engage new and diverse ways of thinking. Appreciate intense debates. Share your own opinions. Seek your own answers. #CloserToTruth #Cosmos #IvetteFuentes #QuantumCosmology #QuantumGravity

Top Comments (10)

@CloserToTruthTV 2026-05-19

Ivette Fuentes wonders at what scales entanglement might interconnect the universe. Where do you think that scale ends — or doesn't it end at all?

5 3 replies
@LuminiferousAether-RGB 2026-05-30

What I've realized I don't understand (of the many things of QM) is that "interaction" CREATES the entanglement, all the while another kind of "interaction" (with the environment) is responsible for the decoherence; however, the "environment" is also particles, and "decoherence" is "coherence, in reverse" (coherence being responsible for the establishment of the entanglement, decoherence - for its demise; but interactions ARE interactions)... Puzzled... Robert, explain, please... P.S. I like Ivettes mind/work, as I've said before...

1
@tonelemoan 2026-06-02

Well Ivette explains THAT they may become entangled but certainly not HOW. You can't leave us hanging like this :)

0
@Ed-quadF 2026-05-28

A comment for the algorithm.

1
@StephenAndMaritha 2026-05-29

The one and only truth will always remain out of reach of humanities comprehension of understanding…☯️

0
@LuminiferousAether-RGB 2026-05-30

Also, space and time ARE the background! 😉

0
@hex-a-gone7065 2026-05-29

Science is still grappling with the fact that self-existence is an illusion. Until science is willing to question the appearance of self-existence nothing will be ultimately solved. Approaching reality with the perspective that objects are independently existent is a knowledge malfunction from the start. Consequently, all subsequent theories are contaminated by a fundamental flaw. Science needs to stop questioning the perception and start questioning the method of perceiving.

1 2 replies
@JB_inks 2026-06-02

So in a 5 minute video, we get a 30 spoiler of what's to come, meaning this is really a 4 minute video. REALLY? Can you just not PLAY THE VIDEO without editing clips at the front out of sequence?

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@FouadMakarem 2026-05-30

METAPHYSICS IS THE BASIS OF PHYSICS... QUANTUM FIELD IS THE BRIDGE BETWEEN THE TWO... A THEORY HAVING BOTH REALITIES RECOGNIZED WILL ANSWER ALL QUESTIONS, AS IT IS THE TRUE REALITY OF EVERYTHING...

1 7 replies
@cademosley4886 2026-05-28

Speaking of universe-wide entanglement in the context of quantum cosmology, I was reading about entanglement across the inflationary multiverse and playing an important role in the emergence of our space and time through the Page-Wootters mechanism. The really basic idea is that it's not clear where time comes from in quantum gravity according to the Wheeler-deWitt equation, since it's dynamic and can't be a background. It has to emerge within the system itself. But in a closed quantum system, there isn't any external environment that allows the Hamiltonian to internally evolve. So formally there aren't any dynamics at all, and there is no time evolution! It's just like a kind of infinite dimensional standing wave in Hilbert space spinning in place. But a target subsystems can have time evolution if you reference it as a separate clock system that's entangled with it but weakly or non-interacting. The punchline is, the ideal clock system for the observable universe would be the combination of 3 things: many more degrees of freedom than our universe, entangled, and non-interacting; and the inflationary multiverse arguably best fit those criteria. The same logic also applies to the emergence of dynamic space in quantum gravity. I think I got the gist of it.

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