I Alcubierre Drive & Gravitational Waves: Alien Effects?

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The Alcubierre drive, a theoretical concept for faster-than-light travel, raises questions about its effects on spacetime and gravitational waves. If aliens were to use this drive to reach our solar system, it is debated whether their travel would create significant gravitational disturbances. Current understanding suggests that the Alcubierre drive does not generate gravitational waves within its spacetime framework. The discussion highlights the need for further exploration of how such advanced technology might interact with gravitational physics. Overall, the implications of the Alcubierre drive on gravitational effects remain largely theoretical and untested.
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If alien people used an Alcubierre drive, would it create notable gravitational waves?
Suppose some aliens travel to our solar system after seeing our radio broadcasts using an Alcubierre drive. Would it not create a notable gravitational disturbance? Or does it leave spacetime undisturbed around it?
 
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As far as I know there are no gravitational waves in an Alcubierre spacetime.
 
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Thread 'Physical Interpretation of Frame Field'

Moderator's note: Spin-off from another thread due to topic change. In the second link referenced, there is a claim about a physical interpretation of frame field. Consider a family of observers whose worldlines fill a region of spacetime. Each of them carries a clock and a set of mutually orthogonal rulers. Each observer points in the (timelike) direction defined by its worldline's tangent at any given event along it. What about the rulers each of them carries ? My interpretation: each...
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