2016/03/07 by Edward A. Rietman, Rietman, Edward A.
Engineering · Physics and Astronomy · #Acoustic Wave Phenomena Research #Experimental and Theoretical Physics Studies #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Quantum Electrodynamics and Casimir Effect #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.1603.02318
I and colleague are working on a new and corrected paper
openalex publication_date 2016/03/07 · arxiv created 2021/07/14 · arxiv updated 2021/07/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Ultrasonic standing waves in a cylindrical enclosure can achieve very high local pressures at the acoustic nodes (~1 MPa). When the acoustic wave passes through a phononic crystal comprised of steel and glycerin, there are regions of constructive interference resulting in even higher local pressures (~100 MPa). At these highly localized pressure points inside the crystal, the equations describing the acoustics break down and the mathematics of gravitational fields are more appropriate. These pressures are so high as to create optical space singularities, analogous to cosmological phenomena. We measure a redshift for light passing through this system and describe how the optical space thus created can be described by elementary equations of a non-rotating black hole.