Paradox?

[Alex K]

Hey Mr. Sandman,

I never did the calculation myself, but I had the same question years ago, and heard someone smart say that from the vantage point of the inertial observer, the apparent effect which the Unruh radiation has on the traveler is explained in the inertial frame by effects from the force transmission of the drive to the accelerated observer, in other words, according to this explanation, the effect of transmitting this much force on the traveler necessarily includes something which looks like Unruh particles from the travelers perspective.

I admit that I have my problems imagining this (especially since the Unruh radiation has such a theoretically smooth homogeneous thermal spectrum, and you'd think the effects from a rocket drive would look messy and come from the back ), but apparently that's what happens. I'll be glad to look it up in more detail.

According to how the Unruh affect works some very strange things can happen.

Unruh Effect:

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Due to the Unruh effect a constantly accelerating observer would find himself in a heat bath of ever increasing temperature.

An inertial observer would see the accelerating observer but would detect no heat bath.

Hypothetically, the accelerating observer would eventually be fried by the increasing heat.

(A hypothetical because the human race has no way to accelerate an observer to such a high speed)

So would the inertial observer, who only sees the accelerating observer (and detects no heat bath), see a dead or alive accelerating observer?