paper

Quantifying the particle aspect of quantum systems

arXiv:1812.08656 · doi:10.1007/s12043-024-02865-5

Abstract

The possibility of a quantum system to exhibit properties that are akin to both the classically held notions of being a particle and a wave, is one of the most intriguing aspects of the quantum description of nature. These aspects have been instrumental in understanding paradigmatic natural phenomena as well as to provide nonclassical applications. A conceptual foundation for the wave nature of a quantum state has recently been presented, through the notion of quantum coherence. We introduce here a parallel notion for the particle nature of a quantum state of an arbitrary physical system. We provide elements of a resource theory of particleness, and give a quantification of the same. Finally, we provide evidence for a complementarity between the particleness thus introduced, and the coherence of an arbitrary quantum state.

7 pages, 2 figures; v2: complementarity with coherence added, few other small corrections; v3: presentation bettered, results unchanged; v4: compatible with journal version, results unchanged

References in corpus (14)