Interferometric Constraints on Spacelike Coherent Rotational Fluctuations
[1];
[2];
[3];
[4];
[6];
[7];
[8];
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Univ. of Chicago, IL (United States); Korea Advanced Inst. Science and Technology (KAIST), Daejeon (Korea, Republic of)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Univ. of Chicago, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- California Institute of Technology (CalTech), Pasadena, CA (United States); Univ. of California, Santa Cruz, CA (United States)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Univ. of Chicago, IL (United States)
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
In this Letter, precision measurements are reported of the cross-spectrum of rotationally induced differential position displacements in a pair of colocated 39 m long, high-power Michelson interferometers. One arm of each interferometer is bent 90° near its midpoint to obtain sensitivity to rotations about an axis normal to the plane of the instrument. The instrument achieves quantum-limited sensing of spatially correlated signals in a broad frequency band extending beyond the 3.9-MHz inverse light travel time of the apparatus. For stationary signals with bandwidth Δ$$\textit{f}$$ > 10 kHz, the sensitivity to rotation-induced strain h of classical or exotic origin surpasses $$\text{CSD}_{δh} < t_P$$/2, where $$t_P$$ = 5.39 × 10–44 $$\textit{s}$$ is the Planck time. This measurement is used to constrain a semiclassical model of nonlocally coherent rotational degrees of freedom of spacetime, which have been conjectured to emerge in holographic quantum geometry but are not present in a classical metric.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Laboratory Directed Research and Development (LDRD) Program
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1780590
- Report Number(s):
- FERMILAB-PUB-20-558-E; arXiv:2012.06939; oai:inspirehep.net:1836365; TRN: US2209736
- Journal Information:
- Physical Review Letters, Vol. 126, Issue 24; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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