269 citations · 3k across the 72 of their papers we have counts for
6 papers · 2 filters
Noisy metrology beyond the standard quantum limit
R. Chaves, J. B. Brask, M. Markiewicz +2
Parameter estimation is of fundamental importance in areas from atomic spectroscopy and atomic clocks to gravitational wave detection. Entangled probes provide a significant precis…
Testing nonlocality of a single photon without a shared reference frame
Jonatan Bohr Brask, Rafael Chaves, Nicolas Brunner
The question of testing the nonlocality of a single photon has raised much debate over the last years. The controversy is intimately related to the issue of providing a common refe…
Local orthogonality as a multipartite principle for quantum correlations
T. Fritz, A. B. Sainz, R. Augusiak +4
In recent years, the use of information principles to understand quantum correlations has been very successful. Unfortunately, all principles considered so far have a bipartite for…
Hybrid Quantum Repeater Protocol With Fast Local Processing
J. Borregaard, J. B. Brask, A. S. Sørensen
We propose a hybrid quantum repeater protocol combining the advantages of continuous and discrete variables. The repeater is based on the previous work of Brask et al. [Phys. Rev.…
Bell tests for continuous variable systems using hybrid measurements and heralded amplifiers
Jonatan Bohr Brask, Nicolas Brunner, Daniel Cavalcanti +1
We present Bell tests for optical continuous variable systems, combining both hybrid measurements (i.e. measuring both particle and wave aspects of light) and heralded amplifiers.…
Robust nonlocality tests with displacement-based measurements
Jonatan Bohr Brask, Rafael Chaves
Lately, much interest has been directed towards designing setups that achieve decisive tests of local realism. Here we present Bell tests with measurements based on linear optical…