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Permanent URI for this collectionhttps://hdl.handle.net/20.500.14288/3
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Item Metadata only A compendious review of majorization-based resource theories: quantum information and quantum thermodynamics(TUBITAK, 2023) 0000-0002-9134-3951; 0000-0002-9167-7273; Torun, Gökhan; Department of Physics; Department of Physics; Müstecaplıoğlu, Özgür Esat; Pusuluk, Onur; Faculty Member; Researcher; College of Sciences; College of Sciences; 1674; N/AThe field of quantum resource theory (QRT) has emerged as an invaluable framework for the examination of small and strongly correlated quantum systems, surpassing the boundaries imposed by traditional statistical treatments. The fundamental objective of general QRTs is to characterize these systems by precisely quantifying the level of control attainable to an experimenter. In this review article, we refrain from providing an exhaustive summary of the extensive literature on QRT. Rather, our focus centers on a specific subliterature founded upon the theory of majorization. The primary aim is to augment our comprehension of genuine quantum phenomena manifested across diverse technological applications and incite investigations into novel resource theories encompassing multiple types of resources. Consequently, we emphasize the underlying similarities shared by various resources, including bipartite quantum entanglement, quantum coherence, and superposition, alongside informational, thermal, and generalized nonequilibrium resources. © 2023 TUBITAK. All rights reserved.Item Metadata only Treatments and placebos for the pathologies of effective field theories(American Physical Society, 2023) 0000-0003-3075-1457; 0000-0001-8856-3067; Department of Physics; N/A; Ramazanoğlu, Fethi Mübin; Andrew, Coates; Faculty Member; Researcher; College of Sciences; College of Sciences; 254225; N/AWe demonstrate some shortcomings of "fixing the equations,"an increasingly popular remedy for time evolution problems of effective field theories (EFTs). We compare the EFTs and their "fixed"versions to the UV theories from which they can be derived in two cases: K-essence and nonlinear Proca theory. We find that when an EFT breaks down due to loss of hyperbolicity, fixing does not approximate the UV theory well if the UV solution does not quickly settle down to vacuum. We argue that this can be related to the EFT approximation itself becoming invalid, which cannot be rectified by fixing. © 2023 American Physical Society.Item Metadata only A quantum otto engine with shortcuts to thermalization and adiabaticity(IOP Publishing Ltd, 2023) 0000-0002-9134-3951; 0000-0002-9831-3632; 0000-0001-7411-3399; 0000-0002-9772-0076; Department of Physics; Department of Physics; N/A; N/A; Müstecaplıoğlu, Özgür Esat; Kabakçıoğlu, Alkan; Pedram, Ali; Kadıoğlu, Serhat Can; Faculty Member; Faculty Member; PhD Student; PhD Student; College of Sciences; College of Sciences; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; 1674; 49854; N/A; N/AWe investigate the energetic advantage of accelerating a quantum harmonic oscillator Otto engine by use of shortcuts to adiabaticity (for the expansion and compression strokes) and to equilibrium (for the hot isochore), by means of counter-diabatic (CD) driving. By comparing various protocols with and without CD driving, we find that, applying both type of shortcuts leads to enhanced power and efficiency even after the driving costs are taken into account. The hybrid protocol not only retains its advantage in the limit cycle, but also recovers engine functionality (i.e. a positive power output) in parameter regimes where an uncontrolled, finite-time Otto cycle fails. We show that controlling three strokes of the cycle leads to an overall improvement of the performance metrics compared with controlling only the two adiabatic strokes. Moreover, we numerically calculate the limit cycle behavior of the engine and show that the engines with accelerated isochoric and adiabatic strokes display a superior power output in this mode of operation.Item Metadata only Cell cycle-dependent palmitoylation of protocadherin 7 by ZDHHC5 promotes successful cytokinesis(Company Biologists Ltd, 2023) 0000-0002-2594-2956; 0000-0002-3418-4448; 0000-0001-6832-7251; 0000-0002-2376-1246; N/A; 0000-0002-5874-960X; N/A; 0000-0001-7977-1286; 0000-0002-5157-8780; N/A; N/A; N/A; N/A; N/A; N/A; N/A; Department of Physics; Department of Molecular Biology and Genetics; Küçük, Nazlı Ezgi Özkan; Yiğit, Berfu Nur; Değirmenci, Beste Senem; Qureshi, Mohammad Haroon; Yapıcı, Gamze Nur; Kamacıoğlu, Altuğ; Bavili, Nima; Kiraz, Alper; Özlü, Nurhan; Researcher; PhD Student; PhD Student; PhD Student; PhD Student; Master Student; PhD Student; Faculty Member; Faculty Member; Koç University Research Center for Translational Medicine (KUTTAM) / Koç Üniversitesi Translasyonel Tıp Araştırma Merkezi (KUTTAM); N/A; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; College of Sciences; College of Sciences; N/A; N/A; N/A; N/A; N/A; N/A; N/A; 22542; 105301Cell division requires dramatic reorganization of the cell cortex, which is primarily driven by the actomyosin network. We previously reported that protocadherin 7 (PCDH7) gets enriched at the cell surface during mitosis, which is required to build up the full mitotic rounding pressure. Here, we report that PCDH7 interacts with and is palmitoylated by the palmitoyltransferase, ZDHHC5. PCDH7 and ZDHHC5 colocalize at the mitotic cell surface and translocate to the cleavage furrow during cytokinesis. The localization of PCDH7 depends on the palmitoylation activity of ZDHHC5. Silencing PCDH7 increases the percentage of multinucleated cells and the duration of mitosis. Loss of PCDH7 expression correlates with reduced levels of active RhoA and phospho-myosin at the cleavage furrow. This work uncovers a palmitoylation-dependent translocation mechanism for PCDH7, which contributes to the reorganization of the cortical cytoskeleton during cell division.Item Metadata only Daily behaviours of Great Bustard (Otis tarda) during the breeding period in the Sootave, Mokryan Region, NorthWestern Iran(Arak Univ, Arak, 2023) Abdulkarimi, Rahim; Naderi, Morteza; Department of Physics; Naderi, Mortaza; Researcher; College of SciencesThe daily behaviours of the Great Bustard (Otis tarda) during the breeding period were examined in the Sootave region of NW Iran. While previous studies by Carmen Martinez (2000) in Spain have provided insights into the seasonal variation, times of day, and land use patterns of Great Bustard activities, this study focuses on understanding the month-to-month variations in behaviour during the breeding period. Data on time budgets were collected, distinguishing between sexes and months. The study revealed variations in behaviours such as courtship, feeding, resting, scanning, moving, flying, and incubation, shedding light on how these behaviours change throughout the breeding season. Males were found to spend more time on courtship displays in March and April, while females allocated more time to feeding during those months. In May and June, these patterns reversed. The study provides important insights into the daily behaviours of Great Bustards during their breeding season, contributing to our understanding of this globally threatened species in Iran.Item Metadata only Powering quantum otto engines only with Q-deformation of the working substance(American Physical Society, 2023) 0000-0002-9134-3951; Ozaydin, Fatih; Hakioǧlu, Tuǧrul; Department of Physics; Müstecaplıoğlu, Özgür Esat; Faculty Member; College of Sciences; 1674We consider a quantum Otto cycle with a q-deformed quantum oscillator working substance and classical thermal baths. We investigate the influence of the quantum statistical deformation parameter q on the work and efficiency of the cycle. In usual quantum Otto cycle, a Hamiltonian parameter is varied during the quantum adiabatic stages while the quantum statistical character of the working substance remains fixed. We point out that even if the Hamiltonian parameters are not changing, work can be harvested by quantum statistical changes of the working substance. Work extraction from thermal resources using quantum statistical mutations of the working substance makes a quantum Otto cycle without any classical analog. © 2023 American Physical Society.Item Metadata only Thermodynamic uncertainty relation in nondegenerate and degenerate maser heat engines(American Physical Society, 2023) 0000-0002-9134-3951; Singh, Varinder; Shaghaghi, Vahid; Rosa, Dario; Department of Physics; Müstecaplıoğlu, Özgür Esat; Faculty Member; College of Sciences; 1674We investigate the thermodynamic uncertainty relation (TUR), i.e., a tradeoff between entropy production rate and relative power fluctuations, for nondegenerate three-level and degenerate four-level maser heat engines. In the nondegenerate case, we consider two slightly different configurations of the three-level maser heat engine and contrast their degree of violation of the standard TUR. We associate their different TUR-violating properties to the phenomenon of spontaneous emission, which gives rise to an asymmetry between them. Furthermore, in the high-temperature limit, we show that the standard TUR relation is always violated for both configurations. For the degenerate four-level engine, we study the effects of noise-induced coherence on the TUR. We show that, depending on the parametric regime of operation, noise-induced coherence can either suppress or amplify the relative power fluctuations. © 2023 American Physical Society.Item Metadata only Dissipative phase transition in an open Tavis-Cummings model with a two-photon drive(IOP Publishing Ltd, 2023) 0000-0002-9134-3951; Adhikary, Kingshuk; Deb, Bimalendu; Department of Physics; Müstecaplıoğlu, Özgür Esat; Faculty Member; College of Sciences; 1674We investigate the steady-state quantum phases and associated collective phenomena of an open Tavis-Cummings (TC) model driven by a two-photon source. The standard (non-dissipative) TC model describes the quantum phases of an ensemble of N ( q ) two-level quantum emitters interacting with a single-mode electromagnetic field. The interplay among coherent driving, dissipation, and dipole interactions of the open TC model results in emergent collective phenomena, leading to a dissipative or non-equilibrium phase transition from the normal to the superradiant phase. We solve the Liouvillian equation analytically using the semi-classical mean-field approximation. We carry out stability analysis of the steady-state phases and determine the phase boundary. The use of Holstein-Primakoff transformation in the thermodynamic limit Nq & RARR;& INFIN;Item Metadata only An overview: steady-state quantum entanglement via reservoir engineering(Old City Publishing Inc, 2023) 0000-0002-9134-3951; 0000-0001-7411-3399; Department of Physics; N/A; Müstecaplıoğlu, Özgür Esat; Pedram, Ali; Faculty Member; PhD Stuent; College of Sciences; Graduate School of Sciences and Engineering; 1674; N/AWe present a short overview of quantum entanglement generation and preservation in a steady state. In addition to the focus on quantum entanglement stabilization, we briefly discuss the same objective for steadystate quantum coherence. The overview classifies the approaches into two main categories: hybrid drive and dissipation methods and purely dissipative schemes. Furthermore, purely dissipative schemes are discussed under two subclasses of equilibrium and nonequilibrium environments. The significance of the dissipative route to sustained quantum entanglement and challenges against it are pointed out. Besides the value of steady-state entanglement for existing quantum technologies, quantum computation, communication, sensing, and simulation, its unique opportunities for emerging and future quantum technology applications, particularly quantum heat engines and quantum energy processing, are discussed.Item Metadata only Entanglement transfer via chiral and continuous-time quantum walks on a triangular chain(Elsevier, 2023) 0000-0002-9134-3951; Saglam, Utku; Paternostro, Mauro; Department of Physics; Müstecaplıoğlu, Özgür Esat; Faculty Member; College of Sciences; 1674We investigate the chiral quantum walk (CQW) as a mechanism for an entanglement transfer on a triangular chain structure. We specifically consider two-site spatially entangled cases in short-time and long-time regimes. Using the concurrence as an entanglement measure; fidelity, and the Bures distance as the measure of the quality of the state transfer, we evaluate the success of the entanglement transfer. We compare the entangled state transfer time and quality in CQW against a continuous-time quantum random walk. We also observe the effect of mixed states on the entanglement transfer quality.Published by Elsevier B.V.