Observational cosmology, with particular focus on the formation and evolution of large scale structures in our universe like clusters of galaxies as large as 500 million light years. “Weighing” the universe, and mapping out the mysterious dark matter it contains.
The origin and evolution of the largest observable structures in the universe (much larger than entire galaxies); understanding why the expansion of the universe is accelerating. Observational techniques: cosmic microwave background, gravitational lensing and gravity waves.
Philosophy of physics, puzzles about the content and status of foundational principles – the logic of physicists’ basic assumptions, especially with regards to space and time, and the history of science, e.g. exactly how Einstein made his discoveries.
Applications of quantum theory to cryptography and computation; understanding in more concrete, physical terms what quantum theory is telling us about the nature of reality. Applications of information theory to better understand the quantum “wave function”.
I review the recent work performed on computing the geometric
discord in non-inertial frames. We consider the well-known case of an
inertially maximally entangled state shared by inertial Alice and non-inertial
Robb. It is found that for high accelerations the geometric discord decays to a
negligible amount; this is in stark contrast to the entropic definition of
quantum discord which asymptotes to a finite value in the same limit. Such a
result has two different implications: the first being that usable quantum
One of humanity's defining traits is to be deeply curious about the world around us. We've all looked up at the night sky, marvelled at rainbows, and been awed by the power of lightening. We've also wondered how these and other natural phenomena work.
Will big questions be answered when the Large Hadron Collider (LHC) switches on in 2007? What will scientists find? Where might the research lead? Nima Arkani-Hamed, a noted particle theorist, is a Professor of Physics at Harvard University. He investigates a number of mysteries and interactions in nature puzzles that are likely to have experimental consequences in the next few years via particle accelerators, like the LHC, as well as cosmological observations.