Prof. Dr. Mehmet Emre Taşgın on February 14, 2024 at 15:30 in SA-240


Prof. Dr. Mehmet Emre Taşgın
Hacettepe University

“Environmental-Induced work extraction”

Entanglement can be utilized as a resource for work extraction in quantum heat engines. A Gaussian measurement in an auxiliary system reduces the engines’s entropy and the engine extracts work in rethermalizing with thee environment [1]. If there exists no intellectual being, here [2] we discuss that, environmental-monitoring performs a Gaussian measurement [3] of strength λ=1. This fixes a relation between entanglement and the extracted work: W = ξ(r) x (nħ wc ) where 0≤ ξ(r)≤ 1 is the degree of the entanglement and (nħwc ) is the entire thermal energy of the engine. This is like a law as it happens by itself. The phenomenon has further consequences. During the work extraction process, constituent particles (photonic or atomic gas) present in the engine start to move along a single direction. As Ricci scalar curvature R of a relativistic gas moving along a single direction is larger than the thermal gas, curvature increases by ΔR = ξ(r) x 32πGp0 /c4 where p0 is the gas pressure. Intriguingly, this matches with the result calculated using QFT in curved spacetime [4]. Things become even more exciting when one considers the inherited symmetrization entanglement in the generation of particle pairs within the QED background.
*Special Thanks to Bayram Tekin and Metin Gurses for their help with GR.

Mehmet Emre Taşgın received his B.S. and PhD degrees in Physics at Bilkent University, in 2003 and 2009. His PhD advisors are Prof. Mehmet Özgür Oktel and Özgür E. Müstecaplıoğlu, and his thesis concerns light propagation and quantum information on coherent media, and electromagnetically induced transparency (EIT) in Bose-Einstein condensates. He performed a one-year post-doc with Özgür E. Müstecaplıoğlu at Koç University in 2010. He worked in the DPT (State Planning Organization) Project for the establishment of a Quantum Cryptology Center in Turkey. He did another one-year post-doc with Pierre Meystre (Editor in Chief of American Physical Society journals) in the College of Optics, at the University of Arizona, in 2011. He studied on the quantum precision measurements and spin-squeezing. Between 2012-2014 he worked in the Kırklareli University at the department of Electrical & Electronics Engineering. Till 2014 he continues his research at the Institute of Nuclear Sciences in Hacettepe University, Ankara. He also has several papers with M. Suhail Zubairy, one of the founders of quantum optics. His current research interests are integrated quantum circuits, nanoscale quantum optics, nonlinear optics, light propagation in highly dispersive media and cold atoms. He is one of the rare persons who has developed his own entanglement criteria for many-particle systems including spin ensembles and lattice systems. He is the winner of 2017 TUBA GEBIP and 2018 ODTU Parlar awards. He is one of the cofounders of KOBIT, Quantum Optics and Information Meeting in Turkey.

Date: February 14, 2024 Wednesday
Time: 15:30
Place: SA-240

All interested are cordially invited.