TY - JOUR
T1 - Dual-path state reconstruction scheme for propagating quantum microwaves and detector noise tomography
AU - Menzel, E. P.
AU - Deppe, F.
AU - Mariantoni, M.
AU - Araque Caballero, M. Á
AU - Baust, A.
AU - Niemczyk, T.
AU - Hoffmann, E.
AU - Marx, A.
AU - Solano, E.
AU - Gross, R.
PY - 2010/8/31
Y1 - 2010/8/31
N2 - Quantum state reconstruction of weak propagating microwaves to date requires the use of linear amplifiers. We introduce a theory which, even in the presence of significant amplifier noise, allows one to use these devices for measuring all quadrature moments of propagating quantum microwaves based on cross correlations from a dual-path amplification setup. Simultaneously, the detector noise properties are determined, allowing for tomography. We demonstrate the feasibility of our novel concept by proof-of-principle experiments with classical mixtures of weak coherent microwaves.
AB - Quantum state reconstruction of weak propagating microwaves to date requires the use of linear amplifiers. We introduce a theory which, even in the presence of significant amplifier noise, allows one to use these devices for measuring all quadrature moments of propagating quantum microwaves based on cross correlations from a dual-path amplification setup. Simultaneously, the detector noise properties are determined, allowing for tomography. We demonstrate the feasibility of our novel concept by proof-of-principle experiments with classical mixtures of weak coherent microwaves.
UR - http://www.scopus.com/inward/record.url?scp=77956289221&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.105.100401
DO - 10.1103/PhysRevLett.105.100401
M3 - Article
AN - SCOPUS:77956289221
SN - 0031-9007
VL - 105
JO - Physical Review Letters
JF - Physical Review Letters
IS - 10
M1 - 100401
ER -