Heisenberg limit for detecting vacuum birefringence

被引：17

作者：

Ahmadiniaz, N. ^{[1
]}

Cowan, T. E. ^{[1
,2
]}

Sauerbrey, R. ^{[1
,3
]}

Schramm, U. ^{[1
,2
]}

Schlenvoigt, H-P ^{[1
]}

Schuetzhold, R. ^{[1
,4
]}

机构：

[1] Helmholtz Zentrum Dresden Rossendorf, Bautzner Landstr 400, D-01328 Dresden, Germany

[2] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany

[3] Tech Univ Dresden, Inst Angew Phys, D-01062 Dresden, Germany

[4] Tech Univ Dresden, Inst Theoret Phys, D-01062 Dresden, Germany

来源：

PHYSICAL REVIEW D | 2020年 / 101卷 / 11期

关键词：

PHOTON ELASTIC-SCATTERING; FIELD; POLARIZATION; SEARCH; LIGHT;

D O I：

10.1103/PhysRevD.101.116019

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Quantum electrodynamics predicts the vacuum to behave as a nonlinear medium, including effects such as birefringence. However, for experimentally available field strengths, this vacuum polarizability is extremely small and thus very hard to measure. In analogy to the Heisenberg limit in quantum metrology, we study the minimum requirements for such a detection in a given strong field (the pump field). Using a laser pulse as the probe field, we find that its energy must exceed a certain threshold depending on the interaction time. However, a detection at that threshold, i.e., the Heisenberg limit, requires highly nonlinear measurement schemes-while for ordinary linear-optics schemes, the required energy (Poisson or shot noise limit) is much larger. Finally, we discuss several currently considered experimental scenarios from this point of view.

引用

页数：10

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