Reliable experimental quantification of bipartite entanglement without reference frames

  title={Reliable experimental quantification of bipartite entanglement without reference frames},
  author={Thomas Lawson and Anna Pappa and Boris Bourdoncle and Iordanis Kerenidis and Damian Markham and Eleni Diamanti},
  journal={Physical Review A},
Simply and reliably detecting and quantifying entanglement outside laboratory conditions will be essential for future quantum information technologies. Here we address this issue by proposing a method for generating expressions which can perform this task between two parties who do not share a common reference frame. These reference frame independent expressions only require simple local measurements, which allows us to experimentally test them using an off-the-shelf entangled photon source. We… Expand

Figures from this paper

Characterizing Multipartite Entanglement with Moments of Random Correlations.
This Letter shows that an improved detection and characterization of multipartite entanglement is possible by combining statistical moments of different order and makes use of designs that are pseudorandom processes allowing us to link the presentEntanglement criteria to ordinary reference frame independent ones. Expand
A Moment for Random Measurements
Different methods using random measurements to detect genuine multipartite entanglement and to distinguish SLOCC classes are discussed and how measurement directions can efficiently be obtained based on spherical designs is reviewed. Expand
Quantum image coding with a reference-frame-independent scheme
The feasibility of frame-invariant coding is shown by using for each pixel a qubit pair prepared in one of two controlled entangled states and is shown much more resistant to quantum bit-flip noise compared to the direct non-invARIant coding. Expand
Quantifying geometric measure of entanglement by mean value of spin and spin correlations with application to physical systems
Abstract We quantify the geometric measure of entanglement in terms of mean values of observables of entangled system. For pure states we find the relation of geometric measure of entanglement withExpand
Multipartite entanglement analysis from random correlations
Quantum entanglement is usually revealed via a well aligned, carefully chosen set of measurements. Yet, under a number of experimental conditions, for example in communication within multipartyExpand


Quantum Information and Computation (QUIC)
Abstract : A broad, multidisciplinary program has been pursued in the area of quantum computation and information. Principal accomplishments include an experiment to localize atoms within a highExpand
  • Rev. Lett. 89, 127902
  • 2002
Journal of Physics: Conference Series: Preface
New J
  • Phys. 15, 123026
  • 2013
and H
  • Weinfurter, ArXiv eprints
  • 2013
I and J
  • Rev. Lett. 108, 240501
  • 2012
  • Rev. Lett. 109, 120403
  • 2012
  • Rev. A 84, 062305
  • 2011
  • Rev. Lett. 106, 230501
  • 2011