2018/04/25 by Kiyoharu Kawana, Kawana, Kiyoharu, Daiki Ueda +1
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #Quantum Gases (cond-mat.quant-gas) #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.1804.09505
openalex publication_date 2018/04/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
We investigate a new experimental possibility of measuring the Newtonian gravitational constant G by using the weak measurement. Amplification via weak measurement is one of the interesting phenomena of quantum mechanics. In this letter, we consider it in a system consisting of many cold atoms which are gravitationally interacting with an external macroscopic source and show that it is possible to obtain O(103) amplification of their relative motion compared with the classical motion when the number of atoms are O(1015) and the observing time is ∼ 0.5s. This result suggests that it might be possible to use this system as a new experimental set up for determining G. Besides, our study indicates that the gravitational force can behave as a repulsive force because of the weak measurement.