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pro vyhledávání: '"Braunstein, Samuel L."'
Recent experimental progresses in controlling classical and quantum fluids have made it possible to realize acoustic analogues of gravitational black holes, where a flowing fluid provides an effective spacetime on which sound waves propagate, demonst
Externí odkaz:
http://arxiv.org/abs/2405.19385
Publikováno v:
Nature Reviews Physics 5, 612-622 (2023)
The recent technological advances in controlling and manipulating fluids have enabled the experimental realization of acoustic analogues of gravitational black holes. A flowing fluid provides an effective curved spacetime on which sound waves can pro
Externí odkaz:
http://arxiv.org/abs/2402.16136
Autor:
Wang, Zhi-Wei, Braunstein, Samuel L.
Dennis Sciama argued that the existence of life depended on many quantities, the fundamental constants, so in a random universe life should be highly unlikely. However, without full knowledge of these constants, his argument implies a universe that w
Externí odkaz:
http://arxiv.org/abs/2306.14934
The traditional quantum speed limits are not attainable for many physical processes, as they tend to be loose and fail to determine the exact time taken by quantum systems to evolve. To address this, we derive exact quantum speed limits for the unita
Externí odkaz:
http://arxiv.org/abs/2305.03839
Autor:
Wang, Zhi-Wei, Braunstein, Samuel L.
Port-based teleportation (PBT) is a variation of regular quantum teleportation that operates without a final unitary correction. However, its behavior for higher-dimensional systems has been hard to calculate explicitly beyond dimension $d=2$. Indeed
Externí odkaz:
http://arxiv.org/abs/2207.04593
Autor:
Wang, Zhi-Wei, Braunstein, Samuel L.
Since the 1970's it has been known that black hole (and other) horizons are truly thermodynamic in nature. More generally, surfaces which are not horizons have also been conjectured to behave thermodynamically. Initially, for surfaces microscopically
Externí odkaz:
http://arxiv.org/abs/2207.04390
Black holes are conjectured to be the fastest quantum scramblers in nature, with the stretched horizon being the scrambling boundary. Under this assumption, we show that any infalling body must couple to virtually the entire black hole Hilbert space
Externí odkaz:
http://arxiv.org/abs/2206.02053
In classical gravity, nothing can escape from a black hole, not even light. In particular, this happens for stationary black holes because their horizons are null. We show, on the other hand, that the apparent horizon and the region near r = 0 of an
Externí odkaz:
http://arxiv.org/abs/2111.00706
Autor:
Wang, Zhi-Wei, Braunstein, Samuel L.
Publikováno v:
ApJ 962 55 (2024)
Random sampling in high dimensions has successfully been applied to phenomena as diverse as nuclear resonances, neural networks and black hole evaporation. Here we revisit an elegant argument by the British physicist Dennis Sciama, which demonstrated
Externí odkaz:
http://arxiv.org/abs/2109.10241
Autor:
Wang, Zhi-Wei, Braunstein, Samuel L.
Noether's theorem identifies fundamental conserved quantities, called Noether charges, from a Hamiltonian. To-date Noether charges remain largely elusive within theories of gravity: We do not know how to directly measure them, and their physical inte
Externí odkaz:
http://arxiv.org/abs/2105.14985