Graduate Discuss Open Problems in Gravity & Cosmology | Join the Conversation

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The discussion invites contributions from individuals working in gravity and cosmology to explore open questions in these fields. Participants are encouraged to identify themselves and share insights, fostering a collaborative environment. The topic is acknowledged as too broad for a single thread, suggesting the creation of separate discussions for specific questions. The thread aims to stimulate engagement and knowledge sharing among professionals. Ultimately, the conversation seeks to address significant challenges in gravity and cosmology.
shahbaznihal
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I am making this thread to discuss interesting open questions in Gravity and Cosmology with people working in these or even relevant area.

Anyone who is working in these (and relevant) areas, please identify yourself here and we will begin and hopefully people will catch on and contribute.
 
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Unfortunately, this topic is much too broad for a PF thread. You can open separate threads on specific questions.

Thread closed.
 

Thread 'EPR revisited'

In an inertial frame of reference (IFR), there are two fixed points, A and B, which share an entangled state $$ \frac{1}{\sqrt{2}}(|0>_A|1>_B+|1>_A|0>_B) $$ At point A, a measurement is made. The state then collapses to $$ |a>_A|b>_B, \{a,b\}=\{0,1\} $$ We assume that A has the state ##|a>_A## and B has ##|b>_B## simultaneously, i.e., when their synchronized clocks both read time T However, in other inertial frames, due to the relativity of simultaneity, the moment when B has ##|b>_B##...
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