Quantum physics for correlated photons

John Rarity, P. R. Tapster

Andre Vatarescu

The quantum Rayleigh scattering of single photons, which is absent from the physical analyses of quantum optic experiments, destroys the mathematical concept of entangled photons. The quantum Rayleigh spontaneous and stimulated emissions provide physically meaningful interpretations for both polarization-based quantum correlations and beam splitter-based anti-correlations by means of groups of identical photons, commonly mistaken for one photon. These can overcome the quantum Rayleigh scattering of single photon in a dielectric medium. The random phases of spontaneously emitted photons play a critical role in obtaining visibility of unity with intensity correlations or number of photons. It is the ratio of physically present photon numbers that determine the visibility rather than a superposition of randomly detected numbers of photons. The intrinsic field of a photon is the same regardless of the optical source. The evolution of the photonic properties of each input of a pure quantum dynamic and coherent number state is described by the Ehrenfest theorem breaking away from the Copenhagen approach of time- and space-independent inputs of mixed density matrices which appear to lead to physically counter-intuitive interpretations.

Andre Vatarescu

The theoretical concept of photonic quantum nonlocality cannot be implemented physically because of the quantum Rayleigh scattering of single photons. A distinction needs to be made between the correlation of individual, single measurements of pure states and the correlation of the measured ensembles of mixed states. The correlation operator of Pauli vector operators delivers the same probabilities of correlated detections of photons for both independent and multi-photon states as for ‘entangled’ states of photons. As single-photon sources are not needed, the design and implementation of quantum computing operations and other devices will be significantly streamlined.

Tilman Pfau, Christian Kurtsiefer, Christopher R. Ekstrom +1 more

Byoung Seung HAM

Abstract Over the last several decades, quantum entanglement has been intensively studied for potential applications in quantum information science. Although intensive studies have progressed for nonlocal correlation, fundamental understanding of entanglement itself is still limited. Here, the quantum feature of anticorrelation, the so-called HOM dip, based on probabilistic entangled photon pairs is analyzed for its fundamental physics and compared with a new method of on-demand entangled photon pair generations using coherent light. The fundamental physics why there is no correlation in HOM dip measurements is answered, and new coherence quantum physics is proposed for macroscopic quantum entanglement generations.

Şebnem Güneş Söyler, Thomas Pohl