TY - JOUR
T1 - Efficient quantum algorithm for computing n-time correlation functions
AU - Pedernales, J.S.
AU - Di Candia, R.
AU - Egusquiza, I.L.
AU - Casanova, J.
AU - Solano, Enrique
PY - 2014
Y1 - 2014
N2 - We propose a method for computing n-time correlation functions of arbitrary spinorial, fermionic, and bosonic operators, consisting of an efficient quantum algorithm that encodes these correlations in an initially added ancillary qubit for probe and control tasks. For spinorial and fermionic systems, the reconstruction of arbitrary n-time correlation functions requires the measurement of two ancilla observables, while for bosonic variables time derivatives of the same observables are needed. Finally, we provide examples applicable to different quantum platforms in the frame of the linear response theory.
AB - We propose a method for computing n-time correlation functions of arbitrary spinorial, fermionic, and bosonic operators, consisting of an efficient quantum algorithm that encodes these correlations in an initially added ancillary qubit for probe and control tasks. For spinorial and fermionic systems, the reconstruction of arbitrary n-time correlation functions requires the measurement of two ancilla observables, while for bosonic variables time derivatives of the same observables are needed. Finally, we provide examples applicable to different quantum platforms in the frame of the linear response theory.
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-84904311886&partnerID=MN8TOARS
U2 - 10.1103/PhysRevLett.113.020505
DO - 10.1103/PhysRevLett.113.020505
M3 - Article
SN - 0031-9007
VL - 113
JO - Physical Review Letters
JF - Physical Review Letters
IS - 2
ER -