Time Elapsed Through Earth's Tunnel: Clock Drop Experiment

  • Context: Graduate 
  • Thread starter Thread starter Count Iblis
  • Start date Start date
  • Tags Tags
    Time Tunneling
Click For Summary

Discussion Overview

The discussion revolves around the hypothetical scenario of a clock being dropped through a tunnel that goes through the Earth, exploring the implications for time elapsed as perceived by the clock. The conversation touches on concepts from both classical and quantum mechanics, including the nature of time in different frameworks.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions the nature of tunneling, asking if it pertains only to spatial tunneling or if it can also involve temporal aspects.
  • Another participant discusses the complexities of time in quantum mechanics, noting that in non-relativistic quantum mechanics, time does not correspond to a measurable state, and in relativistic contexts, determining proper times can be challenging.
  • A different viewpoint suggests that if the clock undergoes true quantum tunneling, it would reappear on the other side of the Earth instantaneously.
  • One participant proposes using the Feynman paths method to understand the situation, suggesting that the clock's proper time could be inferred through a probability distribution based on all possible paths in spacetime.

Areas of Agreement / Disagreement

Participants express differing views on the nature of time and tunneling, with no consensus reached on how time would be measured or perceived by the clock during its journey through the Earth.

Contextual Notes

The discussion includes assumptions about the clock's behavior during tunneling and the implications of quantum mechanics on the concept of time, which remain unresolved.

Count Iblis
Messages
1,859
Reaction score
8
Suppose someone drops a clock and it tunnels through the Earth. What time will have elapsed according to the clock when it emerges on the other side of the Earth?
 
Physics news on Phys.org
Is it only tunneling in space or can it also tunnel in time?
 
Time is one of those annoying issues in quantum mechanics. In non-relativistic QM, time isn't even a state of the system -- there is no operator that corresponds to measuring it. In relativistic QM, you've got a multiplicity of time and proper times are difficult to acertain without resorting to rather advanced applications of statistical mechanics and QM together. The basic idea is that time flow is always determined, in some sense, by the statistical state, and not just by the background structures or even just the dynamics.

Rather hazily, I might try to understand the situation via the Feynman paths method -- the initial state is propagated in spacetime via all possible routes, and the result of a measurement will have a probability distribution given by the interference possible. Assuming that the clock is a fundamental particle (it doesn't explode as it interacts with the Eath), and measures its proper time, the answer would be some inference pattern, in time.
 
As I understand it, and I claim no more authority then an interested amatuer, if the clock does true quamtum tunneling then it will reappear on the other side of the Earth instantly.
 

Similar threads

  • · Replies 11 ·
Replies
11
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 40 ·
2
Replies
40
Views
4K
  • · Replies 14 ·
Replies
14
Views
2K
  • · Replies 13 ·
Replies
13
Views
3K
  • · Replies 18 ·
Replies
18
Views
2K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 58 ·
2
Replies
58
Views
7K