Question Regarding Post-Selected CTCs, Quantum Energy Teleportation, and Sustained Negative Energy Density



Greetings,
I hope this message finds you well. My name is Kevin Huang, and I am an independent researcher with a longstanding interest in quantum information, spacetime physics, and the foundations of quantum mechanics.

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 you happen to know of any existing work touching on this question, or if there is an obvious reason why such a proposal would fail, I would be grateful for any guidance.

Thank you for your time and consideration.

Sincerely,

Kevin YuanKung Huang
Toronto, Ontario, Canada






Daniel Jafferis — jafferis@fas.harvard.edu
Daniel Jafferis — jafferis@physics.harvard.edu
Raphael Bousso — bousso@lbl.gov
Raphael Bousso — rbousso@berkeley.edu
Aron Wall — aronwall@umd.edu
Geoffrey Penington — geoffp@berkeley.edu
Yasunori Nomura — ynomura@berkeley.edu
Hitoshi Murayama — hitoshi@berkeley.edu
Petr Hořava — horava@berkeley.edu
Benjamin Safdi — brsafdi@lbl.gov
Sean Carroll	Quantum foundations, spacetime, cosmology	seancarroll@gmail.com
Carlo Rovelli	Quantum gravity, time, quantum foundations	rovelli@cpt.univ-mrs.fr
Carlo Rovelli	Alternate public contact	rovelli.carlo@gmail.com


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Isaac Chuang	Quantum information and computation	ichuang@mit.edu
Soonwon Choi	Quantum many-body physics	soonwon@mit.edu
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Tracy Slatyer	Theoretical physics, cosmology	tslatyer@mit.edu
Barton Zwiebach	String theory, spacetime	zwiebach@mit.edu
Leonid Levitov	Quantum transport, condensed matter	levitov@mit.edu