Experimental demonstration of coherent superpositions in an ultrasonic pseudospin

Lazaro Calderin, M. Arif Hasan, Neil G. Jenkins, Trevor Lata, Pierre Lucas, Keith Runge, Pierre A. Deymier

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We experimentally demonstrate the existence and control of coherent superpositions of elastic states in the direction of propagation of an ultrasonic pseudospin i.e., a φ-bit. The experimental realization of this mechanical pseudospin consists of an elastic aluminum rod serving as a waveguide sandwiched between two heavy steel plates. The Hertzian contact between the rod and the plates leads to restoring forces which couple the directions of propagation (forward and backward). This coupling generates the coherence of the superposition of elastic states. We also demonstrate φ-bit gate operations on the coherent superposition analogous to those used in quantum computing. In the case of a φ-bit, the coherent superposition of states in the direction of propagation are immune to wave function collapse upon measurement as they result from classical waves.

Original languageEnglish (US)
Article number14156
JournalScientific reports
Issue number1
StatePublished - Dec 1 2019

ASJC Scopus subject areas

  • General


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