The Unruh Effect and Expansion of the Universe

[JPBenowitz]

The Unruh Effect predicts that a uniformly accelerating observer in a vacuum field (full of perturbations) will observe an effective temperature. We know that space is expanding at an accelerating rate. My question is then, in all inertial reference frames would all 'observers' in the universe hypothetically observe this temperature? Could the observation of this temperature be the missing microstates from within black holes which leads to the information paradox?

 

[phinds]

The Unruh Effect predicts that a uniformly accelerating observer in a vacuum field (full of perturbations) will observe an effective temperature. We know that space is expanding at an accelerating rate. My question is then, in all inertial reference frames would all 'observers' in the universe hypothetically observe this temperature?

Given the Cosmological Principle, I'd say yes. If such a thing exists, it should be the same everywhere (away from massive bodies)

Could the observation of this temperature be the missing microstates from within black holes which leads to the information paradox?

HUH ?

 

[mfb]

I would be surprised if the expansion of space (accelerated or not) resembles the acceleration considered for the Unruh effect.
Here is a tricky question: the acceleration (expressed in m/s^2) depends on the distance, but or local observed temperature cannot depend on that. Which distance would we have to choose?

Could the observation of this temperature be the missing microstates from within black holes which leads to the information paradox?

?

 

[Bill_K]

The Unruh Effect predicts that a uniformly accelerating observer in a vacuum field (full of perturbations) will observe an effective temperature. We know that space is expanding at an accelerating rate. My question is then, in all inertial reference frames would all 'observers' in the universe hypothetically observe this temperature?

No. Unruh radiation is observed by an accelerating observer. An observer in an inertial reference frame (even in an expanding universe) is not an accelerating observer.

 

[sardar]

I find this question to be very intriguing and thought-provoking. The Unruh Effect is a well-established phenomenon in theoretical physics that predicts the emergence of a temperature for a uniformly accelerating observer in a vacuum field. This effect has been extensively studied and confirmed through various experiments and calculations.

When it comes to the expansion of the universe, the Unruh Effect becomes even more fascinating. The fact that space is expanding at an accelerating rate means that all objects in the universe are constantly accelerating relative to each other. This raises the question of whether all observers in the universe would indeed observe this effective temperature predicted by the Unruh Effect.

The answer to this question is not straightforward and requires further investigation and research. It is possible that all inertial observers in the universe would observe this temperature, as they are all undergoing some form of acceleration in relation to each other. However, the magnitude of this temperature may vary depending on the specific reference frame and the observer's velocity.

Additionally, the observation of this temperature could potentially be linked to the missing microstates within black holes, which is a major topic of discussion in the field of theoretical physics. The information paradox, which refers to the question of whether information can be destroyed in a black hole, is still a highly debated topic and has yet to be fully resolved.

Overall, the Unruh Effect and the expansion of the universe bring up fascinating questions and possibilities for further exploration and understanding of the universe and its fundamental laws. I am excited to see where future research and experiments will take us in unraveling these mysteries.