Results 51 to 60 of about 142,025 (180)

Transactional Interpretation for the Principle of Minimum Fisher Information

Entropy, 2021
The principle of minimum Fisher information states that in the set of acceptable probability distributions characterizing the given system, it is best done by the one that minimizes the corresponding Fisher information.
Marcin Makowski, Edward W. Piotrowski, Piotr Frąckiewicz, Marek Szopa   +3 more
doaj   +1 more source

Maximal quantum Fisher information for general su(2) parametrization processes

, 2015
Quantum Fisher information is a key concept in the field of quantum metrology, which aims to enhance the parameter accuracy by using quantum resources.
Jing, Xiao-Xing, Liu, Jing, Wang, Xiaoguang, Xiong, Heng-Na   +3 more
core   +1 more source

Exponential time-scaling of estimation precision by reaching a quantum critical point

Physical Review Research, 2022
Quantum metrology refers to the use of quantum resources in parameter-estimation protocols, aiming at enhancing its precision. The quantum Fisher information is a key quantity in this context, setting the ultimate achievable precision with respect to ...
Louis Garbe, Obinna Abah, Simone Felicetti, Ricardo Puebla   +3 more
doaj   +1 more source

Two quantum analogues of Fisher information from a large deviation viewpoint of quantum estimation [PDF]

, 2002
We discuss two quantum analogues of Fisher information, symmetric logarithmic derivative (SLD) Fisher information and Kubo-Mori-Bogoljubov (KMB) Fisher information from a large deviation viewpoint of quantum estimation and prove that the former gives the
, Amari S, Bahadur R R, Bahadur R R, Bahadur R R, Barndorff-Nielsen O E, Bhatia R, Bucklew J A, Cencov N N, Fu J C, Fuchs C A, Goodman R, Hayashi M, Hayashi M, Hayashi M, Hayashi M, Hayashi M, Hayashi M, Hayashi M, Helstrom C W, Hiai F, Holevo A S, Jozsa R, Kubo R, LeCam L, Lindblad G, Masahito Hayashi, Matsumoto K, Nagaoka H, Nagaoka H, Petz D, Petz D, Uhlmann A, Weyl H, Winter A   +34 more
core   +2 more sources

Quantum Fisher and Skew information for Unruh accelerated Dirac qubit [PDF]

, 2015
We develop a Bloch vector representation of Unruh channel for a Dirac field mode. This is used to provide a unified, analytical treatment of quantum Fisher and Skew information for a qubit subjected to the Unruh channel, both in its pure form as well as ...
Alok, Ashutosh Kumar, Banerjee, Subhashish, Omkar, S.   +2 more
core   +2 more sources

Fisher information of a black hole spacetime

Journal of High Energy Physics, 2023
Relativistic quantum metrology is the study of optimal measurement procedures within systems that have both quantum and relativistic components. Here we use Unruh-DeWitt detectors coupled to a massless scalar field as probes of thermal parameters in ...
Everett Patterson, Robert B. Mann
doaj   +1 more source

Fisher information from stochastic quantum measurements

, 2016
The unavoidable interaction between a quantum system and the external noisy environment can be mimicked by a sequence of stochastic measurements whose outcomes are neglected.
Caruso, Filippo, Gherardini, Stefano, Müller, Matthias M., Smerzi, Augusto   +3 more
core   +1 more source

Direct measurement of quantum Fisher information

Physical Review A, 2023
In the adiabatic perturbation theory, Berry curvature is related to the generalized force, and the quantum metric tensor is linked with energy fluctuation. While the former is tested with numerous numerical results and experimental realizations, the latter is less considered.
Xingyu Zhang, Xiao-Ming Lu, Jing Liu, Wenkui Ding, Xiaoguang Wang   +4 more
openaire   +2 more sources

Determining the Continuous Family of Quantum Fisher Information from Linear Response Theory

, 2016
The quantum Fisher information represents the continuous family of metrics on the space of quantum states and places the fundamental limit on the accuracy of quantum state estimation.
Shitara, Tomohiro, Ueda, Masahito
core   +1 more source

Parameter estimation for quantum jump unraveling [PDF]

Quantum
We consider the estimation of parameters encoded in the measurement record of a continuously monitored quantum system in the jump unraveling, corresponding to a single-shot scenario, where information is continuously gathered.
Marco Radaelli, Joseph A. Smiga, Gabriel T. Landi, Felix C. Binder   +3 more
doaj   +1 more source