http://vitayard.in
Open Science and Research Project
OKFN, India
ourselves a better managed nation. Constitutional instruments like the Public Interest Litigation
(PIL), the Right To Information (RTI), etc., lose their relevance without complete transparency in
the dissemination of government as well as non-government data. Building a mass-based system of
knowledge-banks can help us a lot in achieving our goal. We can assist the governments for making
more information public, wherever necessary.
Open Science and Research Project
We are working to implement Open Access to all research done and have built a large community of
supporters. Open Access India has probed to be a major success in spreading the word. However,
we have still a long way to go. Our aim is not only Open Access but Open Research. In near future,
we have a few plans that we would like to implement regarding this. OKFN, India is with Creative
Commons (CC) now: Click Here to know more.
Single-shot readout of a superconducting flux
qubit with a flux-driven Josephson
parametric amplifier
Z. R. Lin, K. Inomata, W. D. Oliver, K. Koshino, Y. Nakamura, J. S. Tsai, T. Yamamoto
Description:
Energy in a multipartite quantum system appears from an operational perspective to be distributed
to some extent non-locally because of correlations extant among the system’s components. This
non-locality allows users to transfer, in effect, locally accessible energy between sites of different
system components by LOCC (local operations and classical communication). Quantum energy
teleportation is a three-step LOCC protocol, accomplished without an external energy carrier, for
effectively transferring energy between two physically separated, but correlated, sites. We apply this
LOCC teleportation protocol to a model Heisenberg spin particle pair initially in a quantum thermal
Gibbs state, making temperature an explicit parameter. We find in this setting that energy
teleportation is possible at any temperature, even at temperatures above the threshold where the
particles’ entanglement vanishes. This shows for Gibbs spin states that entanglement is not
fundamentally necessary for energy teleportation; correlation other than entanglement can suffice.
Dissonance—quantum correlation in separable states—is in this regard shown to be a quantum
resource for energy teleportation, more dissonance being consistently associated with greater energy
yield. We compare energy teleportation from particle A to B in Gibbs states with direct local energy
extraction by a general quantum operation on B and find a temperature threshold below which
energy extraction by a local operation is impossible. This threshold delineates essentially two
regimes: a high temperature regime where entanglement vanishes and the teleportation generated by
other quantum correlations yields only vanishingly little energy relative to local extraction and a
second low-temperature teleportation regime where energy is available at B only by teleportation.
Cite as: arXiv:1309.6706 [cond-mat.supr-con]
(or arXiv:1309.6706v1 [cond-mat.supr-con] for this version)
18