Results 81 to 90 of about 100,483 (275)

Quantum Ratchet in Disordered Quantum Walk [PDF]

Annalen der Physik, 2017
Symmetrically evolving discrete quantum walk results in dynamic localization with zero mean displacement when the standard evolution operations are replaced by a temporal disorder evolution operation. In this work we show that the quantum ratchet action, that is, a directed transport in standard or disordered discrete‐time quantum walk can be realized ...
Sagnik Chakraborty, Arpan Das, Arindam Mallick, C. M. Chandrashekar   +3 more
openaire   +2 more sources

Demonstration of an All‐Optical AND Gate Mediated by Photochromic Molecules

Advanced Functional Materials, EarlyView.
A logic AND gate that runs on photons is demonstrated. It relies on two spatially separated photochromic molecules that work in tandem. Abstract The realization of a photonic logic AND gate, i.e. a logic AND gate that runs on photons rather than electrons, and where all steps are controlled by light, is demonstrated. In a proof‐of‐principle experiment,
Heyou Zhang, Max Gießübel, Pankaj Dharpure, Andrea Albert, Vira Niestierkina, Paul Mulvaney, Mukundan Thelakkat, Jürgen Köhler   +7 more
wiley   +1 more source

Quantum walks in polycyclic aromatic hydrocarbons

New Journal of Physics, 2021
Aromaticity is a well-known phenomenon in both physics and chemistry, and is responsible for many unique chemical and physical properties of aromatic molecules.
Prateek Chawla, C. M. Chandrashekar
doaj   +1 more source

Quantum random walks with history dependence

, 2003
We introduce a multi-coin discrete quantum random walk where the amplitude for a coin flip depends upon previous tosses. Although the corresponding classical random walk is unbiased, a bias can be introduced into the quantum walk by varying the history ...
A P Flitney, Aharonov D Ambainis A Kempe J Varzirani U, Aharonov Y, Ambainis A Bach E Nayak A Viswanath A Watrous J, Brun T A, Brun T A, Childs A M Cleve R Deotto E Farhi E Gutmann S Spielman D A, D Abbott, Davies P C W J Chela-Flores T Owen F Raulin, Du J, Dür W, Farhi E, Feynman R P, Harmer G P, Harmer G P, Harmer G P Abbott D Taylor P G Parrondo J M R D Abbott L B Kish, Kay R Johnson N F, Klarreich E, Lee C F, Lee C F, Meyer D A, Meyer D A, Moraal H, Motwani R, N F Johnson, Nayak A Vishwanath A, Ng J, Nielsen M A, Papadimiriou C, Parrondo J M R, Sanders B C, Shenvi N, Travaglione B C   +32 more
core   +2 more sources

Near‐Infrared Emitting Lanthanide Catecholate Giant Single Crystals – Morphology Control and Photon Down‐Conversion

Advanced Functional Materials, EarlyView.
Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr, Alexander Biewald, Andre Mähringer, Thaddäus J. Koller, Peter Mayer, Markus Döblinger, Achim Hartschuh, Dana D. Medina   +7 more
wiley   +1 more source

Disordered quantum walk-induced localization of a Bose-Einstein condensate

, 2011
We present an approach to induce localization of a Bose-Einstein condensate in a one-dimensional lattice under the influence of unitary quantum walk evolution using disordered quantum coin operation.
A. Ambainis, A. Ambainis, A. M. Childs, C. M. Chandrashekar, D. A. R. Dalvit, G. V. Riazanov, R. P. Feynman, V. Tiggelen   +7 more
core   +1 more source

Quantum random walks without walking [PDF]

Physical Review A, 2009
Quantum random walks have received much interest due to their non-intuitive dynamics, which may hold the key to a new generation of quantum algorithms. What remains a major challenge is a physical realization that is experimentally viable and not limited to special connectivity criteria.
Manouchehri, K, Wang, J. B.
openaire   +2 more sources

Fast‐Responding O2 Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks (MOF‐76)

Advanced Functional Materials, EarlyView.
Luminescent MOF‐76 materials based on Eu(III) and mixed Eu(III)/Y(III) show rapid and reversible changes in emission intensity in response to O2 with very short response times. The effect is based on triplet quenching of the linker ligands that act as photosensitizers. Average emission lifetimes of a few milliseconds turn out to be mostly unaffected by
Zhenyu Zhao, Christian Weinberger, Jakob Steube, Matthias Bauer, Martin Brehm, Michael Tiemann   +5 more
wiley   +1 more source

Quantum walks as a probe of structural anomalies in graphs

, 2012
We study how quantum walks can be used to find structural anomalies in graphs via several examples. Two of our examples are based on star graphs, graphs with a single central vertex to which the other vertices, which we call external vertices, are ...
D. Aharonov, Daniel Reitzner, Edgar Feldman, Hongjun Zheng, Mark Hillery, S. Aaronson, Vladimir Bužek   +6 more
core   +1 more source

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source