Quantum Asymmetry and Noisy Multimode Interferometry
Research output: Contribution to journal › Letter › Research › peer-review
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Quantum Asymmetry and Noisy Multimode Interferometry. / Albarelli, Francesco; Mazelanik, Mateusz; Lipka, Michal; Streltsov, Alexander; Parniak, Michal; Demkowicz-Dobrzanski, Rafal.
In: Physical Review Letters, Vol. 128, No. 24, 240504, 17.06.2022.Research output: Contribution to journal › Letter › Research › peer-review
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TY - JOUR
T1 - Quantum Asymmetry and Noisy Multimode Interferometry
AU - Albarelli, Francesco
AU - Mazelanik, Mateusz
AU - Lipka, Michal
AU - Streltsov, Alexander
AU - Parniak, Michal
AU - Demkowicz-Dobrzanski, Rafal
PY - 2022/6/17
Y1 - 2022/6/17
N2 - Quantum asymmetry is a physical resource that coincides with the amount of coherence between the eigenspaces of a generator responsible for phase encoding in interferometric experiments. We highlight an apparently counterintuitive behavior that the asymmetry may increase as a result of a decrease of coherence inside a degenerate subspace. We intuitively explain and illustrate the phenomena by performing a three-mode single-photon interferometric experiment, where one arm carries the signal and two noisy reference arms have fluctuating phases. We show that the source of the observed sensitivity improvement is the reduction of correlations between these fluctuations and comment on the impact of the effect when moving from the single-photon quantum level to the classical regime. Finally, we also establish the analogy of the effect in the case of entanglement resource theory.
AB - Quantum asymmetry is a physical resource that coincides with the amount of coherence between the eigenspaces of a generator responsible for phase encoding in interferometric experiments. We highlight an apparently counterintuitive behavior that the asymmetry may increase as a result of a decrease of coherence inside a degenerate subspace. We intuitively explain and illustrate the phenomena by performing a three-mode single-photon interferometric experiment, where one arm carries the signal and two noisy reference arms have fluctuating phases. We show that the source of the observed sensitivity improvement is the reduction of correlations between these fluctuations and comment on the impact of the effect when moving from the single-photon quantum level to the classical regime. Finally, we also establish the analogy of the effect in the case of entanglement resource theory.
KW - ENTANGLEMENT
U2 - 10.1103/PhysRevLett.128.240504
DO - 10.1103/PhysRevLett.128.240504
M3 - Letter
C2 - 35776481
VL - 128
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 24
M1 - 240504
ER -
ID: 315460548