Work

Induced Coherence in Quantum and Classical Interferometry: Origin and Control

Year: 2026

Type: preprint

Abstract: The wave-particle duality that manifests in Young's double-slit interferometry satisfying the well known Englert-Greenberger-Yasin inequality has been shown to obey a universal triality relation involving coherence, predictability and rather surprisingly entanglement. In the present work, we explicitly demonstrate the persistence of the triality relation in the quantum induced coherence interferometer and the classical configuration recovers the well known duality inequality. Furthermore, we explore the origin of coherence and entanglement, in the induced coherence interferometer, and means to control them. We show that path indistinguishability (or intrinsic indistinguishability of the sources) in our setup plays a complementary role in influencing both interference and entanglement. We bring out manifestly the nature of coherence in both classical and quantum versions of induced coherence interferometers.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2609.35523

Authors: Viswanathan, Balakrishnan, Pandey, Ravi Kamal, Barshilia, Leena, Mishra, Devendra Kumar, Ghosh, Sibasish, Panigrahi, Prasanta K.

Institutions: Homi Bhabha National Institute, Institute of Mathematical Sciences, Banaras Hindu University, Indian Institute of Science Education and Research Kolkata, Siksha O Anusandhan University

Language: English

Topic: Quantum Mechanics and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Council of Scientific and Industrial Research, India, Ministry of Education, India, Indian Institute of Science Education and Research Pune, Scheme for Promotion of Academic and Research Collaboration

Award: G5480828537

OpenAlex ID: W7214713967

Cites: 1

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Related to: 10