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Quantum beats observed in time resolved X-ray interference experiments
Affiliation:1. National Key Laboratory for Novel Software Technology, Department of Computer Science and Technology, Nanjing University, Nanjing, PR China;2. 6211 Sudikoff Lab, Dartmouth College Hanover, NH 03755, United States;1. Department of Physics Education, Chonnam National University, Gwangju 500-757, Republic of Korea;2. Theoretical Physics Division, Chern Institute of Mathematics, Nankai University, Tianjin 300071, People’s Republic of China;3. Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543, Singapore;1. Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada;2. Jefferson Lab, 12000 Jefferson Avenue, Newport News, VA 23606, USA;3. ARC Centre of Excellence for Particle Physics at the Terascale and CSSM, Department of Physics, University of Adelaide, Adelaide SA 5005, Australia;1. Department of Physics, Southeast University, Nanjing 211189, China;2. College of Physics and Electronic Engineering, Henan Normal University, Xinxiang 453007, China
Abstract:We have employed an LLL-type X-ray interferometer with a mirror crystal divided into two parts and X-cut quartz crystals attached aside each mirror. Ultrasound waves of slightly different frequencies around f = 10 MHz (phonon energies around hf = 41 neV) are fed into the mirrors. The interaction with the coherent photon beams in the interferometer causes quantum beats in the interference intensity. In time resolved interference experiments beat frequencies of Δf = 96 mHz (in energy scale ΔE = hΔf = 397 atto-eV = 3.97 × 10−16 eV) were observed. The energy sensitivity of our experiments achieved values δE = 15.6 zepto-eV = 1.56 × 10−20 eV.
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