Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Keitch, P. A."'
We present a versatile rf pulse control system that has been designed for multi-qubit quantum experiments. One instrument can be scaled to provide 32 channels of rf between 10 - 450 MHz. Synchronization can be achieved across multiple instruments. By
Externí odkaz:
http://arxiv.org/abs/1710.04282
Autor:
de Clercq, L. E., Oswald, R., Flühmann, C., Keitch, B., Kienzler, D., Lo, H. -Y., Marinelli, M., Nadlinger, D., Negnevitsky, V., Home, J. P.
The time evolution of a closed quantum system is connected to its Hamiltonian through Schroedinger's equation. The ability to estimate the Hamiltonian is critical to our understanding of quantum systems, and allows optimization of control. Though spe
Externí odkaz:
http://arxiv.org/abs/1509.07083
Autor:
de Clercq, Ludwig E., Lo, Hsiang-Yu, Marinelli, Matteo, Nadlinger, David, Oswald, Robin, Negnevitsky, Vlad, Kienzler, Daniel, Keitch, Ben, Home, Jonathan P.
Publikováno v:
Phys. Rev. Lett. 116, 080502 (2016)
We demonstrate single-qubit operations by transporting a beryllium ion with a controlled velocity through a stationary laser beam. We use these to perform coherent sequences of quantum operations, and to perform parallel quantum logic gates on two io
Externí odkaz:
http://arxiv.org/abs/1509.06624
Autor:
Alonso, J., Leupold, F. M., Soler, Z. U., Fadel, M., Marinelli, M., Keitch, B. C., Negnevitsky, V., Home, J. P.
Publikováno v:
Nature Communications 7, 11243 (2016)
Fast control of quantum systems is essential in order to make use of quantum properties before they are degraded by decoherence. This is important for quantum-enhanced information processing, as well as for pushing quantum systems into macroscopic re
Externí odkaz:
http://arxiv.org/abs/1509.06157
Autor:
Lindenfelser, F., Keitch, B., Kienzler, D., Bykov, D., Uebel, P., Schmidt, M. A., Russell, P. St. J., Home, J. P.
Publikováno v:
Review of Scientific Instruments, 86, 033107 (2015)
We demonstrate a surface-electrode ion trap fabricated using techniques transferred from the manufacture of photonic-crystal fibres. This provides a relatively straightforward route for realizing traps with an electrode structure on the 100 micron sc
Externí odkaz:
http://arxiv.org/abs/1501.03727
Autor:
Lo, Hsiang-Yu, Kienzler, Daniel, de Clercq, Ludwig, Marinelli, Matteo, Negnevitsky, Vlad, Keitch, Ben C., Home, Jonathan P.
Publikováno v:
Nature 521, 336-339 (2015)
Mesoscopic superpositions of distinguishable coherent states provide an analog to the Schr\"odinger's cat thought experiment. For mechanical oscillators these have primarily been realised using coherent wavepackets, for which the distinguishability a
Externí odkaz:
http://arxiv.org/abs/1412.7100
Autor:
Kienzler, D., Lo, H. -Y., Keitch, B., de Clercq, L., Leupold, F., Lindenfelser, F., Marinelli, M., Negnevitsky, V., Home, J. P.
Publikováno v:
Science 347,6217 (2015)
The robust generation of quantum states in the presence of decoherence is a primary challenge for explorations of quantum mechanics at larger scales. Using the mechanical motion of a single trapped ion, we utilize reservoir engineering to generate sq
Externí odkaz:
http://arxiv.org/abs/1409.3032
Autor:
Lo, H. -Y., Alonso, J., Kienzler, D., Keitch, B. C., de Clercq, L. E., Negnevitsky, V., Home, J. P.
Publikováno v:
Appl. Phys. B, 114:17-25 (2014)
We describe laser systems for photoionization, Doppler cooling and quantum state manipulation of beryllium ions. For photoionization of neutral beryllium, we have developed a continuous-wave 235 nm source obtained by two stages of frequency doubling
Externí odkaz:
http://arxiv.org/abs/1306.3780
Publikováno v:
Optics Letters, Vol. 38, Issue 6, pp. 830-832 (2013)
Two cw single-mode violet (397nm) diode lasers are locked to a single external-cavity master diode laser by optical injection locking. A double-pass 1.6GHz acousto-optic modulator is used to provide a 3.2GHz offset frequency between the two slave las
Externí odkaz:
http://arxiv.org/abs/1212.6266
Autor:
Allcock, D. T. C., Harty, T. P., Ballance, C. J., Keitch, B. C., Linke, N. M., Stacey, D. N., Lucas, D. M.
Publikováno v:
Appl. Phys. Lett. 102, 044103 (2013)
We describe the design, fabrication and testing of a surface-electrode ion trap, which incorporates microwave waveguides, resonators and coupling elements for the manipulation of trapped ion qubits using near-field microwaves. The trap is optimised t
Externí odkaz:
http://arxiv.org/abs/1210.3272