Relativistic Quantum Information
We
investigate entanglement creation between modes of a quantum field contained
within a cavity which undergoes noninertial motion. We find that, in the the low acceleration regime, or equivalently in the small
cavity regime, entanglement can be created from initially separable states and
it can be linearly increased by repeating travel scenarios. We are able to fin analytically how all the parameter involved affect the
entanglement. We suggest that this can be of interest when looking for
Thought experiments involving quantum mechanics in the presence of closed time-like curves (CTCs) seem to have little to do with reality. However, even particles that traverse the CTC passively and without interactions can lead to highly non-trivial effects, such as the maximal violation of the uncertainty principle. Moreover, these effects may carry over to curved space-times without CTCs, presenting novel opportunities for testing non-standard physics in the relativistic regime.
I will discuss a new proposal with the potential to experimentally probe the validity of Rindler quantisation from the recent completely localized framework of non-inertial projective detectors of quantum fields.
We introduce a novel approach to measurements in QFT in non-inertial frames. A simple, localised, analytical model of state detection allows us to study all the standard questions of RQI and yielding simple answers with a clear physical interpretation. We apply the model to investigate extraction of the entanglement from the vacuum, completely characterize entangled state of two localised inertial wave-packets in the accelerating frame and study the entanglement degradation as a function of the proper acceleration of the detector.
Experimental
tests of general relativity performed so far involve systems that can be
effectively described by classical physics. On the other hand, observed gravity
effects on quantum systems do not go beyond the Newtonian limit of the theory.
In light of the conceptual differences between general relativity and quantum
mechanics, as well as those of finding a unified theoretical framework for the
two theories, it is of particular interest to look for feasible experiments
that can only be explained if both theories apply.
While entanglement is believed to underlie the power of
quantum computation
and communication, it is not generally well understood
for multipartite
systems. Recently, it has been appreciated that there
exists proper
no-signaling probability distributions derivable from
operators that do not
represent valid quantum states. Such systems exhibit supra-correlations
that are stronger than allowed by quantum mechanics, but
less than the
We analyze an exactly solvable model consisting of an inertial
Unruh-DeWitt detector which interacts linearly with a massless quantum
field in Minkowski spacetime with a perfectly reflecting flat plane
boundary. This model is related to proposed mirror-field superposition
and relevant experiments in macroscopic quantum phenomena, as well as
atomic fluctuation forces near a conducting surface. Firstly a coupled
set of equations for the detector’s and the field’s Heisenberg operators