Carthage College
NIST Research Intern
National Institute of Standards and Technology (NIST)
Clayton Markech - Final Presentation.pdf
Abstract:
We experimentally verified the quantum entanglement between two polarization states of single photon pair. The experimental setup is based on a Polarization Sagnac interferometer in which a periodically poled potassium titanyl phosphate (PPKTP) crystal is placed for generating two superposed biphoton pairs with orthogonally polarized states using bidirectional spontaneous parametric down-conversion (SPDC). The correlation between the two polarization-entangled photons propagating in distant directions is examined by measuring a set of quantum interference graphs as their relative polarization states are scanned. The analyzed data shows quantum interference visibilities of greater than 99.7%, which show a strong correlation between the two separate photons. The Clauser-Horne-Shimony-Holt inequality value for Bell’s nonlocality test is S = 2.8177±0.0032 (theoretical maximum 2.828), verifying the two photons are strongly entangled in polarization.
I am Clayton Markech, a rising senior at Carthage College in Kenosha, WI. I am finishing my double major in math and physics this coming year and a minor in data science. I've grown up playing sports and still play football at Carthage as a tight end. Outside of school and studying, I often watch sports of many varieties, play video games, and work out. I also play the saxophone on occasion.