Measuring space-time curvature using maximally path-entangled quantum states
- Author(s)
- Thomas B. Mieling, Christopher Hilweg, Philip Walther
- Abstract
Experiments at the interface of quantum field theory and general relativity would greatly benefit theoretical research towards their unification. The gravitational aspects of quantum experiments performed so far can be explained either within Newtonian gravity or by Einstein's equivalence principle. Here, we describe a way to measure components of the Riemann curvature tensor with maximally path-entangled quantum states of light. We show that the entanglement-induced increase in sensitivity also holds for gravitationally induced phases in Mach-Zehnder interferometers. As a result, the height difference between the two interferometer arms necessary to rule out flat space-time by measuring gravity gradients can be significantly reduced.
- Organisation(s)
- Gravitational Physics, Research Network Quantum Aspects of Space Time, Quantum Optics, Quantum Nanophysics and Quantum Information
- Journal
- Physical Review A
- Volume
- 106
- No. of pages
- 5
- ISSN
- 2469-9926
- DOI
- https://doi.org/10.1103/PhysRevA.106.L031701
- Publication date
- 09-2022
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103024 Quantum field theory, 103026 Quantum optics, 103028 Theory of relativity
- Keywords
- ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/measuring-spacetime-curvature-using-maximally-pathentangled-quantum-states(98e4203c-6999-4b0c-8dc1-b24328dae201).html