Negative Energy Densities Through Post Selection and Quantum Energy Teleportation

[qntumbraincompinterface]

Would it be possible to have a sustained negative energy density sent from the future, as this would bypass the quantum inequality that forbids sustained large amounts of negative energy density due to the approaching infinitesimally short amount of time of the densities time of existence.

The idea here is that the requirement for shorter periods of time could approach the instant present and pass it into negative time/the past. This would somehow use post selection and Quantum Energy Teleportation.

Sabine Hossenfelder on sending messages to the past:

Does this make any sense?
Thanks so much for your input.
Sorry if this post isn't allowed.
Be well
Best regards,
Kevin H.

 

[exchemist]

Would it be possible to have a sustained negative energy density sent from the future, as this would bypass the quantum inequality that forbids sustained large amounts of negative energy density due to the approaching infinitesimally short amount of time of the densities time of existence.

The idea here is that the requirement for shorter periods of time could approach the instant present and pass it into negative time/the past. This would somehow use post selection and Quantum Energy Teleportation.

Sabine Hossenfelder on sending messages to the past:

Does this make any sense?
Thanks so much for your input.
Sorry if this post isn't allowed.
Be well
Best regards,
Kevin H.

Sabine does not mention negative energy at all, so far as I can see. That being so, the video has no apparent connection to what you are saying. Note also that Sabine expresses scepticism about the meaning of the paper she discusses, describing the notion of sending messages into the past as just eye-catching bullshit. What she says the paper is really about (I think, having admittedly only briefly watched it) is exploring the challenge to classical ideas of causality posed by both relativity (i.e. the relativity of simultaneity) and quantum mechanics (through its probablistic nature).

Separately, regarding your interest in -ve energy, you can certainly have an energy value that is -ve with respect to some arbitrarily defined level. For instance gravitational energy can be defined relative to a zero that is set at a point where the gravitating objects are at a notional infinite separation. Relative to that energy level, the objects have increasingly negative gravitational potential energy as they move closer to one another.

But, as energy is merely a property of a system, you can't send an "energy density". You would need to send something with an energy density. And as a density also implies a volume of space is involved, that something would need to have dimensions to be defined. So one way and another I struggle with what you are trying to convey.

 

[qntumbraincompinterface]

Sorry, when I said, Post Selection I meant, Postselected Closed Timelike Curves (P-CTC)

 

[James R]

Would it be possible to have a sustained negative energy density sent from the future...

Why do you think that might be possible?

What kind of negative energy density do you have in mind, and what does it mean for it to be "sustained"?

Are you aware of anything that has ever been sent from the future?

...as this would bypass the quantum inequality that forbids sustained large amounts of negative energy density due to the approaching infinitesimally short amount of time of the densities time of existence.

Which inequality, specifically?

The idea here is that the requirement for shorter periods of time could approach the instant present and pass it into negative time/the past.

I don't understand that. Can you please explain in more detail?

This would somehow use post selection and Quantum Energy Teleportation.

What is Quantum Energy Teleportation?

Sabine Hossenfelder on sending messages to the past:

Could you please summarise how this video is relevant?

Does this make any sense?

I doubt it, but maybe you can help me to understand it.

Sorry if this post isn't allowed.

It's fine. Why did you think it wouldn't be allowed?

 

[qntumbraincompinterface]

Thanks so much for your input!
Sorry, my English abilities are limited.


I got some help putting my ideas together into a coherent few passages:


I have been thinking about a speculative question involving post-selected closed timelike curves (P-CTCs), quantum energy teleportation (QET), and the generation of negative energy densities. Before spending more time investigating it, I was hoping to learn whether this idea has already been considered in the literature, or whether there are known reasons it would not be possible.

My question is roughly as follows:

If a P-CTC framework allows future consistency conditions to influence present outcomes through postselection, could such a mechanism be combined with a QET-type protocol to create or maintain a region of negative energy density for longer than would ordinarily be permitted by standard quantum inequalities?

More specifically, I am wondering whether future boundary conditions introduced through a P-CTC-like process could effectively alter the constraints that normally limit the magnitude-duration relationship of negative energy densities.

I realize this question is highly speculative and may rely on assumptions that are not physically realizable. My goal is not to advocate a theory, but simply to understand whether this line of thought has already been explored, and if so, whether there are papers, authors, or concepts that would be relevant for me to study.


If anyone has studied areas of Science needed to understand this idea, please do share your opinion.
Thanks and be well

 

[James R]

Why didn't you answer any of the questions I asked you, qntumbraincompinterface?

It's like you just ignored my post. That seems rude, to say the least.

Why would I want to try to help answer your questions, if you won't do me the courtesy of answering mine?

 

[exchemist]

Why didn't you answer any of the questions I asked you, qntumbraincompinterface?

It's like you just ignored my post. That seems rude, to say the least.

Why would I want to try to help answer your questions, if you won't do me the courtesy of answering mine?

James on the inequality point I suspect this relates, in some horribly garbled way admittedly, to the energy.time formulation of the Uncertainty Principle. And looking at this in the context of -ve energy may be to do with transient virtual particles (the QFT model of the Casimir effect and things like that).

But none of it seems to be coherent, so I recognise the danger that I may projecting sense onto nonsense here, effectively “sanewashing” it.