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Physics and Computer Science Faculty Publications

Series

2014

Articles 1 - 8 of 8

Full-Text Articles in Physics

Control Power In Perfect Controlled Teleportation Via Partially Entangled Channels, Xi-Han Li, Shohini Ghose Nov 2014

Control Power In Perfect Controlled Teleportation Via Partially Entangled Channels, Xi-Han Li, Shohini Ghose

Physics and Computer Science Faculty Publications

We analyze and evaluate perfect controlled teleportation via three-qubit entangled channels from the point of view of the controller. The key idea in controlled teleportation is that the teleportation is performed only with the participation of the controller. We calculate a quantitative measure of the controller's power and establish a lower bound on the control power required for controlled teleportation. We show that the maximally entangled Greenberger-Horne-Zeilinger state is a suitable channel for controlled teleportation of arbitrary single qubits-the controller's power meets the bound and the teleportation fidelity without the controller's permission is no better than the fidelity of a …

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Fractal Growth On The Surface Of A Planet And In Orbit Around It, Ioannis Haranas, Ioannis Gkigkitzis, Athanasios Alexiou Oct 2014

Fractal Growth On The Surface Of A Planet And In Orbit Around It, Ioannis Haranas, Ioannis Gkigkitzis, Athanasios Alexiou

Physics and Computer Science Faculty Publications

Fractals are defined as geometric shapes that exhibit symmetry of scale. This simply implies that fractal is a shape that it would still look the same even if somebody could zoom in on one of its parts an infinite number of times. This property is also called self-similarity with several applications including nano-pharmacology and drug nanocarriers. We are interested in the study of the properties of fractal aggregates in a microgravity environment above an orbiting spacecraft. To model the effect we use a complete expression for the gravitational acceleration. In particular on the surface of the Earth the acceleration is …

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The Mass Of Graviton And Its Relation To The Number Of Information According To The Holographic Principle, Ioannis Haranas, Ioannis Gkigkitzis Oct 2014

The Mass Of Graviton And Its Relation To The Number Of Information According To The Holographic Principle, Ioannis Haranas, Ioannis Gkigkitzis

Physics and Computer Science Faculty Publications

We investigate the relation of the mass of the graviton to the number of information 𝑁 in a flat universe. As a result we find that the mass of the graviton scales as 𝑚gr ∝ 1/√𝑁. Furthermore, we find that the number of gravitons contained inside the observable horizon is directly proportional to the number of information 𝑁; that is, 𝑁gr ∝ 𝑁. Similarly, the total mass of gravitons that exist in the universe is proportional to the number of information 𝑁; that is, 𝑀gr ∝ √𝑁. In an effort to establish a relation between the graviton …

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"Multiparty Quantum Communication Using Multiqubit Entanglement And Teleportation", Shohini Ghose, Atul Kumar, Angele M. Hamel Aug 2014

"Multiparty Quantum Communication Using Multiqubit Entanglement And Teleportation", Shohini Ghose, Atul Kumar, Angele M. Hamel

Physics and Computer Science Faculty Publications

We propose a 2N qubit entangled channel that can be used to teleport N qubits in a network to a single receiver. We describe the structure of this channel and explicitly demonstrate how the protocol works. The channel can be used to implement a scheme in which all parties have to participate in order for the teleportation to be successful. This can be advantageous in various scenarios and we discuss the potential application of this protocol to voting.

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Information Gain In Tomography–A Quantum Signature Of Chaos, Vaibhav Madhok, Carlos A. Riofrío, Shohini Ghose, Ivan H. Deutsch Jan 2014

Information Gain In Tomography–A Quantum Signature Of Chaos, Vaibhav Madhok, Carlos A. Riofrío, Shohini Ghose, Ivan H. Deutsch

Physics and Computer Science Faculty Publications

We find quantum signatures of chaos in various metrics of information gain in quantum tomography. We employ a quantum state estimator based on weak collective measurements of an ensemble of identically prepared systems. The tomographic measurement record consists of a sequence of expectation values of a Hermitian operator that evolves under repeated application of the Floquet map of the quantum kicked top. We find an increase in information gain and, hence, higher fidelities in the reconstruction algorithm when the chaoticity parameter map increases. The results are well predicted by random matrix theory.

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Kretschmann Invariant And Relations Between Spacetime Singularities Entropy And Information, Ioannis Gkigkitzis, Ioannis Haranas, Omiros Ragos Jan 2014

Kretschmann Invariant And Relations Between Spacetime Singularities Entropy And Information, Ioannis Gkigkitzis, Ioannis Haranas, Omiros Ragos

Physics and Computer Science Faculty Publications

Curvature invariants are scalar quantities constructed from tensors that represent curvature. One of the most basic polynomial curvature invariants in general relativity is the Kretschmann scalar. This study is an investigation of this curvature invariant and the connection of geometry to entropy and information of different metrics and black holes. The scalar gives the curvature of the spacetime as a function of the radial distance r in the vicinity as well as inside of the black hole. We derive the Kretschmann Scalar (KS) first for a fifth force metric that incorporates a Yukawa correction, then for a Yukawa type of …

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Enhanced Capillary Rise Of Wetting Liquids In Reduced Gravitational Shielding Under Microgravity Conditions, George D. Zouganelis, Ioannis Gkigkitzis, Ioannis Haranas Jan 2014

Enhanced Capillary Rise Of Wetting Liquids In Reduced Gravitational Shielding Under Microgravity Conditions, George D. Zouganelis, Ioannis Gkigkitzis, Ioannis Haranas

Physics and Computer Science Faculty Publications

We study the capillary rise of wetting in liquids by slightly modifying Ponomarenko’s result, a recently derived and observed t1/3 law, without omitting the corresponding gravity term and therefore we find hnew (t)≅0.9085hPon (t) instead, which corresponds to a 9% difference. Furthermore, in order to examine the effect of corrected gravity, we extend the result on the surface of a planetary body by correcting the gravitational acceleration for its oblateness coefficient and rotation. We find that experiments that take place on the equator result in highest capillary heights, than those at mid latitudes and the poles. …

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An Experimental Study On The Heat Enhancement And The Bio-Heat Transfer Using Gold Macro Road And Ultrasound: A Potential Alternative To Kill Cancer Cells, C. Austerlitz, Ioannis Gkigkitzis, Ioannis Haranas, Diana Campos Jan 2014

An Experimental Study On The Heat Enhancement And The Bio-Heat Transfer Using Gold Macro Road And Ultrasound: A Potential Alternative To Kill Cancer Cells, C. Austerlitz, Ioannis Gkigkitzis, Ioannis Haranas, Diana Campos

Physics and Computer Science Faculty Publications

We have previously proposed a method of treating solid tumors with a combination of gold macro-rods irradiated with ultrasound. Macro particle sized rods offer a greater circumferential treatment area over nanoparticle options. Experimental studies were conducted to investigate the heat enhancement and the bio-heat transfer to breast chicken using gold macro rod and ultrasound. An ultrasound, other than a focused ultrasound, may produce heat enough to cook a chicken breast up to about 1 cm diameter if a single gold rod is placed on the superficial tissue. Simulations and experimental results will provide the means to evaluate the treatment, to …

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