Coherently driven quantum features using a linear optics-based polarization-basis control

Abstract

Quantum entanglement generation is generally known to be impossible by any classical means. According to Poisson statistics, coherent photons are not considered quantum particles due to the bunching phenomenon. Recently, a coherence approach has been applied for quantum correlations such as the Hong–Ou–Mandel (HOM) effect, Franson-type nonlocal correlation, and delayed-choice quantum eraser to understand the mysterious quantum features. In the coherence approach, the quantum correlation has been now understood as a direct result of selective measurements between product bases of phase-coherent photons. Especially in the HOM interpretation, it has been understood that a fixed sum-phase relation between paired photons is the bedrock of quantum entanglement. Here, a coherently excited HOM model is proposed, analyzed, and discussed for the fundamental physics of two-photon correlation using linear optics-based polarization-basis control. For this, polarization-frequency correlation in a Mach–Zehnder interferometer is coherently excited using synchronized acousto-optic modulators, where polarization-basis control is conducted via a selective measurement process of the heterodyne signals. Like quantum operator-based destructive interference in the HOM theory, a perfectly coherent analysis shows the same HOM effects of the paired coherent photons on a beam splitter, whereas individual output intensities are uniform.

Coherently excited superresolution using intensity product of phase-controlled quantum erasers via polarization-basis projection measurements

“…A typical method of entangled photon pair generation is to use a spontaneous parametric down-conversion (SPDC) process [2], where the phase-matching condition among the pump and two sibling photons is critical [1,2,3,4]. Unlike a single photon, thus, the fixed phase between entangled photons is straightforward for the wave nature of quantum mechanics [1][2][3][4][5][6][7]. Such an understanding of the wave nature-based quantum correlation has emerged to revisit the Hong-Ou-Mandel (HOM) effect [5,6], Franson-type nonlocal correlation [7], and delayed-choice quantum eraser [8,9].…”

“…Unlike a single photon, thus, the fixed phase between entangled photons is straightforward for the wave nature of quantum mechanics [1][2][3][4][5][6][7]. Such an understanding of the wave nature-based quantum correlation has emerged to revisit the Hong-Ou-Mandel (HOM) effect [5,6], Franson-type nonlocal correlation [7], and delayed-choice quantum eraser [8,9]. Experimental demonstration of the fixed phases relation has been conducted in trapped ions for a π/2 phase difference [10].…”

“…Experimental demonstration of the fixed phases relation has been conducted in trapped ions for a π/2 phase difference [10]. A complete coherence solution of the HOM effect for the π/2 phase relation has also been presented [5,6]. Most recently, the same phase relation has been applied to the superresolution whose fundamental physics is in the nonlocal correlation [11].…”

Coherently excited superresolution using intensity product of phase-controlled quantum erasers via polarization-basis projection measurements

“…Unlike a single photon, thus, the fixed phase between entangled photons is straightforward for the wave nature of quantum mechanics 1 – 7 . Such an understanding of the wave nature-based quantum correlation has emerged to revisit the Hong-Ou-Mandel (HOM) effect 5 , 6 , Franson-type nonlocal correlation 7 , and delayed-choice quantum eraser 8 , 9 . Experimental demonstration of the fixed phase relation has been conducted in trapped ions for a phase difference 10 .…”

“…Experimental demonstration of the fixed phase relation has been conducted in trapped ions for a phase difference 10 . A complete coherence solution of the HOM effect for the phase relation has also been presented 5 , 6 . Most recently, the same phase relation has been applied to superresolution in quantum sensing whose fundamental physics is in the nonlocal correlation 11 .…”