TY - JOUR
T1 - Probabilistic Metrology Attains Macroscopic Cloning of Quantum Clocks
JF - Physical Review Letters
Y1 - 2014
A1 - Gendra, B.
A1 - Calsamiglia, John
A1 - Muñoz-Tapia, R.
A1 - E. Bagan
A1 - Chiribella, G.
VL - 113
UR - http://link.aps.org/doi/10.1103/PhysRevLett.113.260402
ER -
TY - JOUR
T1 - Decomposition of any quantum measurement into extremals
JF - Journal of Physics A: Mathematical and Theoretical
Y1 - 2013
A1 - Sentís, G
A1 - Gendra, B.
A1 - Bartlett, S D
A1 - Doherty, A C
VL - 46
IS - 37
JO - J. Phys. A: Math. Theor.
ER -
TY - JOUR
T1 - Quantum Metrology Assisted by Abstention
JF - Physical Review Letters
Y1 - 2013
A1 - Gendra, B.
A1 - Ronco-Bonvehi, E.
A1 - Calsamiglia, John
A1 - Muñoz-Tapia, R.
A1 - E. Bagan
AB - The main goal of quantum metrology is to obtain accurate values of physical parameters using quantum probes. In this context, we show that abstention, i.e., the possibility of getting an inconclusive answer at readout, can drastically improve the measurement precision and even lead to a change in its asymptotic behavior, from the shot-noise to the Heisenberg scaling. We focus on phase estimation and quantify the required amount of abstention for a given precision. We also develop analytical tools to obtain the asymptotic behavior of the precision and required rate of abstention for arbitrary pure states.
VL - 110
UR - http://prl.aps.org/abstract/PRL/v110/i10/e100501
IS - 10
JO - Phys. Rev. Lett.
ER -