Browsing Conference Publications by Author "Uys, H"

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Controlling the quantum world with light

Author: Uys, H ; Akhalwaya, I ; Botha, N ; Burd, S ; Hendriks, A ; Madigoe, R ; Ombinda-Lemboumba, Saturnin ; Smit, A ; Kloppers, H ; Steyn, J ; Botha, L Date: Oct 2012 In this presentation the authors discuss the technological relevance of quantum mechanics, and describe how researchers use light to control the atomic and molecular world at its most fundamental level. Read more
Decoherence of superposition states in trapped ions

Author: Uys, H ; Biercuk, M ; Van Devender, AP ; Ospelkaus, C ; Meiser, D ; Ozeri, R ; Bollinger, JJ Date: Sep 2010 This paper investigates the decoherence of superpositions of hyperfine states of 9Be+ ions due to spontaneous scattering of off-resonant light. It was found that, contrary to conventional wisdom, elastic Raleigh scattering can have major ... Read more
Detecting yocto (10-24) newton forces with trapped ions

Author: Uys, H ; Biercuk, M ; Britton, JW ; Van Devender, AP ; Bollinger, JJ Date: Sep 2010 This article reports on a calibrated measurement of 174 Yoctonewton using a cloud of 60 9 Be+ ion confined in a Penning ion trap. These measurements suggest that ion traps may form the basis of a new class of ultrasensitive deployable force sensors. Read more
Femtosecond laser control of chemical reaction of carbon monoxide and hydrogen

Author: Du Plessis, A ; Strydom, CA ; Uys, H ; Botha, L ; Roberts, T ; Dlamini, TH Date: Sep 2010 Femtosecond laser control of chemical reactions is made possible through the use of pulse-shaping techniques coupled to a learning algorithm feedback loop – teaching the laser pulse to control the chemical reaction. This can result in ... Read more
Femtosecond laser control of chemical reactions

Author: Du Plessis, A ; Strydom, CA ; Uys, H ; Botha, L ; Roberts, T ; Dlamini, TH Date: 31 Aug 2010 Femtosecond laser control of chemical reactions is made possible through the use of pulse-shaping techniques coupled to a learning algorithm feedback loop – teaching the laser pulse to control the chemical reaction. This can result in ... Read more
Femtosecond laser induced and controlled chemical reaction of carbon monoxide and hydrogen

Author: Du Plessis, A ; Strydom, CA ; Uys, H ; Hendriks, A ; Botha, GN ; Botha, LR Date: Jul 2011 Results from experiments aimed at bimolecular chemical reaction control of CO and H2 at room temperature and pressure, without any catalyst, using shaped femtosecond laser pulses are presented. A stable reaction product (CO2) was measured ... Read more
Laser coherent control of quantum dynamics at the CSIR: NLC

Author: Botha, L ; Du Plessis, A ; Uys, H ; de Clercq, L Date: 01 Sep 2010 Coherent control of quantum dynamics in optical, molecular and biological systems is a rapidly advancing field with many possible applications. This field of study was originally motivated by the goal of steering photoreactions into specific ... Read more
Prolonging coherence in trapped ions

Author: Uys, H ; Biercuk, M ; Van Devender, AP ; Bollinger, JJ Date: Sep 2010 The authors study pulse sequences that dynamically decouple 9Be+ ions from their decohering environment. The noise environment the ions see is artificially synthesized to emulate a variety of physical systems. By incorporating measurement ... Read more
Pulse shaping and characterization with a 4f system

Author: Botha, N ; Botha, L ; Du Plessis, A ; Uys, H ; Schoewer, H Date: Oct 2010 The design of the pulse shaping setup as well as factors taken into account in choosing a specific setup will be discussed. We investigate the generation of simple shaped pulses to test our pulse shaper setup. Difference frequency mixing is ... Read more
Scaling ion traps for quantum computing

Author: Uys, H ; Amini, JM ; Wesenberg, JH ; Seidelin, S ; Britton, J ; Bollinger, JJ ; Leibfried, D ; Ospelkaus, C ; Van Deventer, AP ; Wineland, DJ Date: Sep 2010 The design, fabrication and preliminary testing of a chipscale, multi-zone, surface electrode ion trap is reported. The modular design and fabrication techniques used are anticipated to advance scalability of ion trap quantum computing architectures Read more
Selective excitation of a vibrational level within the electronic ground state of a polyatomic molecule with ultra pulses

Author: de Clercq, L ; Botha, L ; Uys, H ; Du Plessis, A ; Rohwer, E Date: Sep 2010 Coherent control of the upper vibrational level populations in the electronic ground state of a polyatomic molecule was simulated. Results indicate that selective excitation of a specific upper state level is possible Read more
Selective excitation of a vibrational level within the electronic ground state of a polyatomic molecule with ultra short pulses

Author: De Clercq, L ; Botha, L ; Uys, H ; Du Plessis, A ; Rohwer, E Date: Sep 2010 Coherent control of the upper vibrational level populations in the electronic ground state of a polyatomic molecule was simulated. Results indicate that selective excitation of a specific upper state level is possible. Read more
Topology of the landscape of optimally controlled transitions in a multilevel system

Author: Madigoe, RJ ; Botha, LR ; Uys, H ; Rohwer, EG ; Smit, A Date: Oct 2012 According to a theoretical analysis, the control landscape of many quantum control problems has a very favourable topology regardless of the detailed nature of the Hamiltonian, provided that one has full control of the system. It is obvious ... Read more

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Browsing Conference Publications by Author "Uys, H"

Browsing Conference Publications by Author "Uys, H"

Browse

All of ResearchSpace

This Collection

Quick Links

Legislation and compliance

General Enquiries

Social Connect