95 citations · 1.3k across the 75 of their papers we have counts for
5 papers · 1 filter
Quantum metrology at the limit with extremal Majorana constellations
F. Bouchard, P. de la Hoz, G. Bjork +8
Quantum metrology allows for a tremendous boost in the accuracy of measurement of diverse physical parameters. The estimation of a rotation constitutes a remarkable example of this…
Error estimation in the direct state tomography
Isabel Sainz, Andrei B. Klimov
We show that reformulating the Direct State Tomography (DST) protocol in terms of projections into a set of non-orthogonal bases one can perform an accuracy analysis of DST in a si…
Correlation transfer in large-spin chains
I. F. Valtierra, J. L. Romero, A. B. Klimov
It is shown that transient spin-spin correlations in one-dimensional spin S>>1 chain can be enhanced for initially factorized and individually squeezed spin states. Such correlatio…
Discrete phase-space mappings, tomographic condition and permutation invariance
C. Muñoz, A. B. Klimov
We analyze different families of discrete maps\ in the N-qubit systems in the context of the permutation invariance. We prove that the tomographic condition imposed on the self-dua…
Quantum tomography via Non-orthogonal basis and weak values
Juan Jesus Diaz, Isabel Sainz, Andrei B. Klimov
Using a relation between a bi-orthogonal set of equiseparable bases and the weak values of the density matrix we derive an explicit formula for its tomographic reconstruction compl…