Browsing by Author "Gassab, Lea"

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Citation - WoS: 0
Citation - Scopus: 1
Geometrical Optimization of Spin Clusters for the Preservation of Quantum Coherence
(Amer Physical Soc, 2024) Gassab, Lea; Pusuluk, Onur; Pusuluk, Onur; Mustecaplioglu, Ozguer E.
We investigate the influence of geometry on the preservation of quantum coherence in spin clusters subjected a thermal environment. Assuming weak interspin coupling, we explore the various buffer network configura yons that can be embedded in a plane. Our findings reveal that the connectivity of the buffer network is crucial indetermining the preservation duration of quantum coherence in an individual central spin. Specifically, we observe that the maximal planar graph yields the longest preservation time for a given number of buffer spins. Interestingly, our results demonstrate that the preservation time does not consistently increase with an increasing #umber of buffer spins. Employing a quantum master equation in our simulations, we further demonstrate that a Cetrahedral geometry comprising a four-spin buffer network provides optimal protection against environmental Tects.
Quantum Models of Consciousness From a Quantum Information Science Perspective
(Mdpi, 2025) Gassab, Lea; Pusuluk, Onur; Cattaneo, Marco; Muestecaplioglu, Ozgur E.
This perspective explores various quantum models of consciousness from the viewpoint of quantum information science, offering potential ideas and insights. The models under consideration can be categorized into three distinct groups based on the level at which quantum mechanics might operate within the brain: those suggesting that consciousness arises from electron delocalization within microtubules inside neurons, those proposing it emerges from the electromagnetic field surrounding the entire neural network, and those positing it originates from the interactions between individual neurons governed by neurotransmitter molecules. Our focus is particularly on the Posner model of cognition, for which we provide preliminary calculations on the preservation of entanglement of phosphate molecules within the geometric structure of Posner clusters. These findings provide valuable insights into how quantum information theory can enhance our understanding of brain functions.