Abstract
In the presence of an external magnetic field, the Carroll-Field-Jackiw term introduces a displacement current proportional to the Lorentz-violating background that induces a time-dependent magnetic field. Axion-like particles or hidden photons could generate an analogous signal, potentially detectable with the set-up suggested by Sikivie, Tanner and Sullivan - a sensitive magnetometer coupled to a superconducting LC circuit. We show that a similar set-up, but with an externally driven pick-up loop whose area varies harmonically at $\sim$ Hz, can be used to probe the spatial components of the Lorentz-violating background to the level of $\lesssim 10^{-31}$ GeV. This is eight orders of magnitude more sensitive than previous laboratory-based limits.
Highlights
The Standard Model is an extremely successful theory firmly based on the principles of quantum mechanics and special relativity
The flux of this field through a pick-up loop generates a current in a superconducting circuit that in turn induces a magnetic field in a separate coil, which could be detected by a sensitive magnetometer
We show that the CFJ Lagrangian (1) modifies the Maxwell equations analogously to the axionlike particles (ALPs)-photon couplings discussed in Ref. [11], but instead of light ALPs, it is the time component of the Lorentz-symmetry violation (LSV) background that couples to an external magnetic field
Summary
The Standard Model is an extremely successful theory firmly based on the principles of quantum mechanics and special relativity. In this paper we discuss a new laboratory-based test of the CFJ model inspired by the proposal put forward by Sikivie, Sullivan and Tanner [11] in the context of photons coupled to axionlike particles (ALPs) as cold dark matter candidates [12,13]. The ALP-photon coupling modifies the Maxwell equations and, in the presence of an external magnetic field, creates a displacement current serving as the source for an ALP-originated magnetic field The flux of this field through a pick-up loop generates a current in a superconducting circuit that in turn induces a magnetic field in a separate coil, which could be detected by a sensitive magnetometer (e.g., a SQUID). We show that the CFJ Lagrangian (1) modifies the Maxwell equations analogously to the ALP-photon couplings discussed in Ref. We use natural units (c 1⁄4 ħ 1⁄4 1, μ0 1⁄4 1=ε0 1⁄4 4π) throughout
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
