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RISS 인기검색어
- 검색키워드
- 저자 : Fakhar Zaman (검색결과 17 건)
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Aesculus indica‑derived heteroatom‑doped carbon as an electrode material for super‑capacitor
Fakhar Zaman,Muhammad Waqas Ishaq,Aisha Munawar,Umer Younas,Zahid Ali 한국탄소학회 2023 Carbon Letters Vol.33 No.7
Energy storage for sustainable development and progress of power production industries is vitally important. The energy storage devices are under extensive research from last three decades to ensure the hand-on-hand coordination with power supply phenomenon and to reduce the energy loses in lines. The cost-effective materials are still highly demanding as an electrode material for energy storage devices. Biomass-derived carbon materials are best candidates due to their low cost, relatively high abundance, pollution-free nature. Here, we are reporting a facile two-step green approach to convert Himalayan horse chestnuts (HHCNs) into activated carbon materials. In first step, grinding and pyrolysis of the HHCNs were carried out, and then activation was performed using KOH to enhance the pore density and surface area. HHCNs-derived carbon was utilized as an electrode in electrical double-layer capacitors (EDLCs) with 1 M H2SO4 as an electrolyte. The macroporous structure along with hierarchical porous network acts as an efficient source of transportation of charges across the electrode and separator. Cyclic voltammetry test was taken from 10 to 100 mV/s current and within a range of 0–1 V applied potential; approximately rectangular CV shown mirror response towards current and shown typical EDLCs properties. The proximate analysis confirms the presence of heteroatoms like sulfur, oxygen, and nitrogen which act as carbon dopants. The wettability of HHCNs-derived carbon enhanced due to the various types of oxygen functionalities inherited from the lignin skeletal part. The nitrogen content is primarily responsible for the pseudo-capacitive behavior of HHCNs-codoped carbon. HHCNs-derived activated carbon materials has emerged as a promising electrode material for energy storage applications.
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Fakhar Zaman,Hyundong Shin(신현동) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.2
We propose a counterfectual protocol to implement a swap gate by using the chained quantum Zeno gate. We assume that remote parties have a untangled pair of quantum states. We demonstrate that our counterfactual swap gate protocol: i) enables remote parties to exchange one qubit of quantum information in each direction at the same time, ii) without using preshared entanglement, and iii) without transmitting any physical particle over the quantum channel.
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Chained Quantum Zeno Superdense Coding
Fakhar Zaman,Hyundong Shin 한국통신학회 2019 한국통신학회 학술대회논문집 Vol.2019 No.11
We present a chained quantum Zeno superdense coding scheme that enables remote parties to accomplish without prior entanglement but no physical particle is found in the transmission channel. We consider that two remote parties, namely, Bob (sender) and Alice (receiver), have unentangled particles-an electron and a photon, respectively. First, we generate entanglement between the electron and photon without transmitting any physical particle over the channel. Bob performs one of the four unitary operations on his entangled particle for transmitting a two-bit classical message. Instead of transmitting his entangled particle to Bob, Alice and Bob perform counterfactual Bell-state analysis based on the chained quantum Zeno effect to distinguish between the four Bell-states under local operations and enable Alice to decode the two-bit classical message.
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Bell’s Inequality Violation on MATLAB
Somi Yun,Fakhar Zaman,Junaid ur Rehman,Hyundong Shin 한국통신학회 2020 한국통신학회 학술대회논문집 Vol.2020 No.8
Bell’s inequality provides a framework to objectively decide the locality of a system. In this article, we demonstrate the violation of Bell’s inequality on IBM quantum devices and Matlab. Our main objective in Matlab simulations is to characterize the robustness of Bell’s inequality under different types of noise models. We find parameter thresholds for depolarizing and amplitude damping channels below which violation of Bell’s inequality can be ensured for the maximally entangled states.
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Classical Simulation of Shor’s Algorithm
Kihyo Kwon,Fakhar Zaman,Junaid ur Rehman,Hyundong Shin 한국통신학회 2020 한국통신학회 학술대회논문집 Vol.2020 No.8
We provide the classical simulation of a compiled version of Shor’s algorithm to factor 15. The classical simulation is performed on a simulator designed on Matlab, which is capable of simulating general quantum circuits with different noise models in the circuit. In the noisy simulation, we introduce depolarizing and amplitude damping noise whose strength matches that of actual noise in the IBM quantum device. A comparison of noisy simulation and implementation on IBM quantum devices shows that the simulator closely mimics the behavior of IBM quantum devices by choosing appropriate noise strengths.
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