2021-01-25T09:38:07Z
https://digital.csic.es/dspace-oai/request
oai:digital.csic.es:10261/153790
2017-08-03T00:53:38Z
com_10261_14181
com_10261_4
col_10261_14184
Wormhole spacetimes with SQUID arrays
Sabín, Carlos
ICE-3 , Palma de Mallorca 13-15 April 2016 ; http://ice-3.hbar.es/
Quantum simulators are becoming increasingly popular as non-universal quantum computers with the
potential of proving the long -sought quantum supremacy. An alternate approach is to consider
them as useful tools to explore the frontiers of quantum physics, ranging from open problems in
well-established theories such as quantum field theory to untested physics whose observability is hard
or dubious. Wormholes or Einstein-Rosen bridges are compelling mathematical objects appearing in
some solutions of Einstein's General Relativity equations. Since they provide a bridge between distant
regions of spacetime, they have attracted a great deal of attention from a foundational viewpoint as well
as at a pedagogical level. They might contain closed timelike curves (CTCs), which are also interesting
for Quantum Computing applications, since they would boost the capabilities of quantum computers. We
present an analog quantum simulator of spacetimes containing traversable wormholes. A suitable
spatial dependence in the external bias of a dcSQUID array mimics the propagation of light in a 1D
wormhole background. The impedance of the array places severe limitations on the type of spacetime
that we can implement. However, we find that wormhole throat radius in the sub-mm range are
achievable. We show how to modify this spacetime in order to allow the presence of closed timelike
curves. The quantum fluctuations of the phase due to the impedance might be seen as an analogue of
Hawking's chronology protection mechanism.
Peer Reviewed
2017-08-02T10:01:48Z
2017-08-02T10:01:48Z
2016-04-14
2017-08-02T10:01:48Z
comunicación de congreso
3rd edition of Quantum Information (2016)
1st RICE SCHOOL “New Trends in Quantum Information” (2016)
http://hdl.handle.net/10261/153790
eng
Sí
closedAccess