Observations of coherence de Broglie waves

Abstract

Photonic de Broglie waves (PBWs) via two-mode entangled photon pair interactions on a beam splitter show a pure quantum feature which cannot be obtained by classical means1-4. Although PBWs have been intensively studied for quantum metrology5-13 and quantum sensing14-25 over the last several decades, their implementation has been limited due to difficulties of high-order NOON state generation4. Recently a coherence version of PBWs, the so-called coherence de Broglie waves (CBWs), has been proposed in a pure classical regime of an asymmetrically coupled Mach-Zehnder interferometer (MZI)26. Unlike PBWs, the quantumness of CBWs originates from the cascaded quantum superposition of the coupled MZI. Here, the first CBWs observation is presented in a pure classical regime and discussed for its potential applications in coherence quantum metrology to overcome conventional PBWs limited by higher-order entangled photons. To understand the quantum superposition-based nonclassical features in CBWs, various violation tests are also performed, where asymmetrical phase coupling is the key parameter for CBWs.

9 pages, 4 figures

References in corpus (4)

• 14-qubit entanglement: creation and coherence
• Coherently driven photonic de Broglie Sagnac interferometer
• The origin of correlation fringe in Franson-type experiments
• Deterministic control of photonic de Broglie waves using coherence optics: Coherence de Broglie waves

Cited by in corpus (5)

• Analysis of nonclasscial features in a coupled macroscopic binary system
• Phase noise-immune unconditionally secured classical key distribution using doubly coupled Mach-Zehnder interferometer
• Macroscopic randomness for quantum entanglement generation
• Coherently controlled quantum features in a coupled interferometric scheme
• Deterministic quantum correlation in an interferometric scheme