Erlangen 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 34: Quantum Information (Quantum Communication)
Q 34.6: Vortrag
Dienstag, 6. März 2018, 15:15–15:30, K 1.020
Can the EPR paradox be resolved without recourse to non-locality? — •Keerthan Subramanian1,3 and Nirmal Viswanathan2 — 1Centre for Interdisciplinary Sciences, Tata Institute of Fundamental Research, Hyderabad 500107, India — 2School of Physics, University of Hyderabad, Hyderabad 500046, India — 3Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, 69120 Heidelberg, Germany
Quantum mechanics is correct, but is it complete? This was the question raised by Einstein, Podolsky and Rosen(EPR) in 1935 through a gedanken experiment. Thanks to the work of Bohm and Bell states suggested by EPR were found to have mutually exclusive quantitative predictions from classical and quantum theories.
Most experiments that have been used to resolve the paradox have used non-locally correlated(aka entangled states) to demonstrate strong correlations in line with quantum mechanical predictions. Such experiments typically make use of the spin angular momentum(SAM) of photons. However, photons can also possess an orbital angular momentum(OAM) which is related to phase helicities. We demonstrate an interferometric scheme to perform OAM projections which when combined with SAM projections can measure correlations between the two. Subsequently by creating locally correlated SAM/OAM photon states that are non-separable and mathematically isomorphic with non-locally correlated states, we demonstrate strong correlations violating Bell's inequality thereby resolving the EPR paradox without recourse to non-locality.