Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: sohail on 09/10/2007 21:09:12

Title: Quantum Theory
Post by: sohail on 09/10/2007 21:09:12

How can something come out of nothing as long as the energy is given back eventually? Is there a time limit? Could it be used as an arguement for a closed universe and that maybe we are an example of just such a quantum phenominon?

Title: Quantum Theory
Post by: DoctorBeaver on 09/10/2007 23:51:35

With our current level of knowledge we just have to accept that certain things happen. We know what happens but we don't know how or why.

Title: Quantum Theory
Post by: lightarrow on 10/10/2007 18:50:25

Quote from: sohail on 09/10/2007 21:09:12

How can something come out of nothing as long as the energy is given back eventually?

Because of HUP (Heisenberg Uncertainty Principle): the uncertainty ΔE on the measured energy of a system cannot be less than h/2Δt where Δt is the measure's duration. So, the less is Δt, the higher must be ΔE, so the system can reach very high energies. Said in another way: in a very small time, our planet (or more) could disappear and something else with the same energy reappear immediately after.

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Is there a time limit? Could it be used as an arguement for a closed universe and that maybe we are an example of just such a quantum phenominon?

Don't know.