A quantum engine by pumping electrons in a nanojunction with a single gate and dynamic tunnel couplings to the leads
DOI:
https://doi.org/10.20526/pisika.01a18.09Abstract
We configure a source-channel-drain nanojunction to function as either a quantum pump or a quantum engine by dynamically varying the tunnel couplings to the leads and applying a time-dependent gate potential. The dynamics of the time-varying components follow an operating protocal in such a way that electrons are pumped, adiabatically or nonadiabatically, from the left lead, through the channel, and on to the right lead without a source-drain bias potential. We express the electron energy current flowing across the device in terms of nonequilibrium Green’s functions. These nonequilibrium Green’s functions are then expressed in terms of steady-state Green’s functions which are, in turn, expressed in terms of the equilibrium Green’s functions of
the free leads. The equilibrium Green’s functions are determined from the equation of motion of each free lead.
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Issue
Welcome to the maiden online issue of PISIKA.
PISIKA is a bi-annual online journal that was conceived to provide physicists and physics educators, both from the Philippines and abroad, an accessible reference and online resource. The name “PISIKA” pays homage to the quarterly journal previously published by the Samahang Pisika ng Pilipinas (SPP), which was launched in October 2007. With this online journal, it is hoped that the dissemination of research output and sharing of scientific knowledge will be more expedient.
The articles appearing in this issue are select, peer-reviewed papers presented during the 36th SPP Physics Conference held in Palawan, Philippines from June 6 to 9, 2018. In the future, this online journal will welcome submission of articles from the following research fields: astrophysics and atmospheric physics, complex systems, computational physics, condensed matter physics, instrumentation physics, lasers and their applications, liquid crystals, materials science, mathematical physics, optics and photonics, physics in medicine and biology, plasma physics, signal and image processing, theoretical physics, and physics education research, among others.
On behalf of the interim Editors-in-Chief, I would like to thank the members of the advisory panel and topical editors composed of experts in the fields of Photonics, Material Science, High Energy Physics, Computational Physics and Plasma Physics. PISIKA, as the Philippines’ first online physics journal is a testament to their invaluable contributions.
Thank you very much.
Interim Editor in Chief
About the Cover:
Monthly averaged Tropical Rainfall Measuring Mission (TRMM) satellite images for the years 2008-2017. See article by Archie Ilarian Veloria and co-authors, DOI: 10.20526/pisika.01a18.01. Cover art by Miguel Y. Bacaoco.
