The maximum size of an object which can be teleported

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Discussion Overview

The discussion revolves around the theoretical limits of teleportation, particularly concerning the maximum size of an object that can be teleported. Participants explore concepts related to quantum mechanics, the nature of objects versus their quantum states, and the implications of these ideas for teleportation protocols. The conversation includes speculative reasoning and challenges regarding the feasibility of teleporting larger objects.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants propose that there may be a theoretical limit to the size of an object that can be teleported, suggesting that this limit is very small, potentially involving only dozens of atoms.
  • Others argue that before establishing limits, experimental evidence of teleporting an object (not just its quantum state) is necessary, questioning the validity of discussing size limits without such evidence.
  • One participant suggests that if a theoretical limit exists, it could serve as a NO-GO theorem to prevent wasted efforts in exploring teleportation of larger objects.
  • Another viewpoint is that the scalability of teleportation protocols and decoherence effects may be more significant factors than size alone in determining the feasibility of teleportation.
  • Some participants present counterexamples where teleportation could theoretically occur even with many particles, indicating that size may not be the sole barrier to teleportation.
  • There is a discussion about the distinction between an object and its quantum state, with some participants questioning whether hidden variables might be involved in the teleportation process.
  • Concerns are raised about the completeness of quantum states and whether it is theoretically possible to teleport the complete quantum state of a system, including position probabilities.

Areas of Agreement / Disagreement

Participants express a range of views, with no consensus on the existence of a size limit for teleportation. Disagreements persist regarding the implications of size, the necessity of experimental evidence, and the nature of quantum states versus objects.

Contextual Notes

The discussion highlights limitations in current understanding, including unresolved questions about the nature of quantum states, the effects of decoherence, and the implications of teleportation protocols for larger systems.

  • #31
ZapperZ said:
A electron has a "spin" state. But the spin state is not the electron.

The quantum teleportation experiments that have been done only teleported the quantum state of the entangled ensemble. It does not teleport the object itself.

Zz.

i agree.



----------------------------------
What is actually teleported?
A. Peres
...There are no "unknown quantum states." The phrase is self-contradictory. Moreover, Alice and Bob are only inanimate objects: They know nothing. What is teleported instantaneously from one system (Alice) to another system (Bob) is the applicability of the preparer's knowledge of the state of a particular qubit in the systems...




------------------
C.Fuchs
...07 December 1998, and to the other teleporters, “Swedish Bikini Team”
The Swedish television crew came and went yesterday with little incident. No questions at all
about the soul this time: I was spared (and maybe so were you). But I didn’t pass up the chance to try to get an unsuspecting audience to think deeply about the wave function. (This audience, in fact, really will be unsuspecting: the footage was for a Swedish children’s show.)
The question came, “What material is teleported? What is it that is transported instantaneously
from Alice to Bob?”
I said, “The only thing that is teleported in quantum teleportation is what the preparer HAS
THE RIGHT TO SAY about Bob’s system. It is his description, his predictions, that jump instantaneously from one system to the other.”
A blank stare, “But what MATERIAL is teleported?”
“That is the material.”
He seemed pleased and left it at that. When he left, I had a look at my atlas to refresh the old
memory: Sweden was indeed not so very far from Copenhagen...
 

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