C
C. J. Ballance
Researcher at University of Oxford
Publications - 56
Citations - 2613
C. J. Ballance is an academic researcher from University of Oxford. The author has contributed to research in topics: Qubit & Ion trap. The author has an hindex of 18, co-authored 42 publications receiving 1990 citations.
Papers
More filters
Journal ArticleDOI
Hybrid quantum logic and a test of Bell's inequality using two different atomic isotopes.
C. J. Ballance,V. M. Schäfer,Jonathan Home,D. J. Szwer,Scott C. Webster,David Allcock,Norbert M. Linke,T. P. Harty,D. P. L. Aude Craik,D. N. Stacey,Andrew M. Steane,D. M. Lucas +11 more
TL;DR: A deterministic quantum logic gate is used to generate a ‘hybrid’ entangled state of two trapped-ion qubits held in different isotopes of calcium, perform full tomography of the state produced, and make a test of Bell’s inequality with non-identical atoms.
Journal ArticleDOI
Minimally complex ion traps as modules for quantum communication and computing
TL;DR: This work performs the most detailed analysis to date on this purification task, using a protocol which is balanced to maximise fidelity while minimising the device complexity and the time cost of the process.
Journal ArticleDOI
Heating rate and electrode charging measurements in a scalable microfabricated surface-electrode ion trap.
David Allcock,T. P. Harty,H. A. Janacek,Norbert M. Linke,C. J. Ballance,Andrew M. Steane,D. M. Lucas,R. L. Jarecki,S. D. Habermehl,Matthew Glenn Blain,Daniel Lynn Stick,D. L. Moehring +11 more
TL;DR: In this article, the performance of a surface-electrode ion "chip" trap fabricated using established semiconductor integrated circuit and microelectro-mechanical system (MEMS) microfabrication processes is characterized.
Journal ArticleDOI
Reduction of heating rate in a microfabricated ion trap by pulsed-laser cleaning
David Allcock,L Guidoni,L Guidoni,T. P. Harty,C. J. Ballance,Matthew Glenn Blain,Andrew M. Steane,D. M. Lucas +7 more
TL;DR: In this paper, a planar micro-fabricated ion trap was cleaned using ns pulses from a tripled Nd:YAG laser at 355nm and the effect of the laser pulses at several energy density levels has been tested by measuring the heating rate of a single 40Ca+ trapped ion as a function of its secular frequency.
Journal ArticleDOI
Experimental quantum key distribution certified by Bell's theorem
D. P. Nadlinger,Peter Drmota,B. C. Nichol,Gabriel Araneda,D. Main,R. Srinivas,D. M. Lucas,C. J. Ballance,Kirill Ivanov,Ernest Y.-Z. Tan,Pavel Sekatski,Rudiger Urbanke,Renato Renner,Nicolas Sangouard,Jean-Daniel Bancal +14 more
TL;DR: In this article , the authors proposed a quantum key distribution protocol with device-independent security. But the secrecy of the key is not guaranteed device-independently, but based on the validity of quantum theory, and certified by measurement statistics observed during the experiment.