Zobrazeno 1 - 10
of 562
pro vyhledávání: '"Ballance, C"'
Autor:
McCann, M., Mulholland, L. P., Xiong, Z., Ramsbottom, C. A., Ballance, C. P., Just, O., Bauswein, A., Martínez-Pinedo, G., McNeill, F., Sim, S. A.
A large number of R-matrix calculations of electron impact excitation for heavy elements (Z > 70) have been performed in recent years for applications in fusion and astrophysics research. With the expanding interest in heavy ions due to kilonova (KN)
Externí odkaz:
http://arxiv.org/abs/2411.16476
Autor:
Sotirova, A. S., Leppard, J. D., Vazquez-Brennan, A., Decoppet, S. M., Pokorny, F., Malinowski, M., Ballance, C. J.
We present a novel protocol for high-fidelity qubit state preparation and measurement (SPAM) that combines standard SPAM methods with a series of in-sequence measurements to detect and remove errors. The protocol can be applied in any quantum system
Externí odkaz:
http://arxiv.org/abs/2409.05805
Autor:
Saner, S., Băzăvan, O., Webb, D. J., Araneda, G., Lucas, D. M., Ballance, C. J., Srinivas, R.
Full coherent control and generation of superpositions of the quantum harmonic oscillator are not only of fundamental interest but are crucial for applications in quantum simulations, quantum-enhanced metrology and continuous-variable quantum computa
Externí odkaz:
http://arxiv.org/abs/2409.03482
We present results from a pilot study, using a laser-produced plasma, to identify new lines in the 350 to 1000 nm spectral region for the r-process element gold (Au), of relevance to studies of neutron star mergers. This was achieved via optical-IR s
Externí odkaz:
http://arxiv.org/abs/2407.15072
Autor:
Löschnauer, C. M., Toba, J. Mosca, Hughes, A. C., King, S. A., Weber, M. A., Srinivas, R., Matt, R., Nourshargh, R., Allcock, D. T. C., Ballance, C. J., Matthiesen, C., Malinowski, M., Harty, T. P.
The central challenge of quantum computing is implementing high-fidelity quantum gates at scale. However, many existing approaches to qubit control suffer from a scale-performance trade-off, impeding progress towards the creation of useful devices. H
Externí odkaz:
http://arxiv.org/abs/2407.07694
Autor:
Shivam, Saumya, Pokorny, Fabian, Vazquez-Brennan, Andres, Sotirova, Ana S., Leppard, Jamie D., Decoppet, Sophie M., Ballance, C. J., Sondhi, S. L.
We propose encoding multiple qubits inside ions in existing trapped-ion quantum computers to access more qubits and to simplify circuits implementing standard algorithms. By using such `virtual' qubits, some inter-ion gates can be replaced by intra-i
Externí odkaz:
http://arxiv.org/abs/2406.19332
Autor:
Băzăvan, O., Saner, S., Webb, D. J., Ainley, E. M., Drmota, P., Nadlinger, D. P., Araneda, G., Lucas, D. M., Ballance, C. J., Srinivas, R.
Quantum harmonic oscillators model a wide variety of phenomena ranging from electromagnetic fields to vibrations of atoms in molecules. Their excitations can be represented by bosons such as photons, single particles of light, or phonons, the quanta
Externí odkaz:
http://arxiv.org/abs/2403.05471
Autor:
Sotirova, A. S., Sun, B., Leppard, J. D., Wang, A., Wang, M., Vazquez-Brennan, A., Nadlinger, D. P., Moser, S., Jesacher, A., He, C., Pokorny, F., Booth, M. J., Ballance, C. J.
Individual optical addressing in chains of trapped atomic ions requires generation of many small, closely spaced beams with low cross-talk. Furthermore, implementing parallel operations necessitates phase, frequency, and amplitude control of each ind
Externí odkaz:
http://arxiv.org/abs/2310.13419
Publikováno v:
PRX Quantum 4, 040313 (2023)
One of the most formidable challenges of scaling up quantum computers is that of control signal delivery. Today's small-scale quantum computers typically connect each qubit to one or more separate external signal sources. This approach is not scalabl
Externí odkaz:
http://arxiv.org/abs/2305.12773
Autor:
Saner, S., Băzăvan, O., Minder, M., Drmota, P., Webb, D. J., Araneda, G., Srinivas, R., Lucas, D. M., Ballance, C. J.
All laser-driven entangling operations for trapped-ion qubits have hitherto been performed without control of the optical phase of the light field, which precludes independent tuning of the carrier and motional coupling. By placing $^{88}$Sr$^+$ ions
Externí odkaz:
http://arxiv.org/abs/2305.03450