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pro vyhledávání: '"O'Brien, K P"'
We observed the low mass X-ray binary Cyg X-2 for a total of 18 nights over two observing runs in July and September of 2006, using the Otto Struve Telescope at McDonald Observatory and the Rossi X-ray Timing Explorer. Using discrete cross correlatio
Externí odkaz:
http://arxiv.org/abs/2406.17941
Autor:
Vincentelli, F. M., Casella, P., Borghese, A., Cavecchi, Y., Mastroserio, G., Stella, L., Altamirano, D., Padilla, M. Armas, Baglio, M. C., Belloni, T. M., Casares, J., Cúneo, V. A., Degenaar, N., Trigo, M. Díaz, Fender, R., Maccarone, T., Malzac, J., Sánchez, D. Mata, Middleton, M., Migliari, S., Muñoz-Darias, T., O'Brien, K., Panizo-Espinar, G., Sánchez-Sierras, J., Russell, D. M., Uttley, P.
We report on the first simultaneous high-time resolution X-ray and infrared (IR) observations of a neutron star low mass X-ray binary in its hard state. We performed $\approx 2\,$h of simultaneous observations of 4U 1728-34 using HAWK-I@VLT, XMM-Newt
Externí odkaz:
http://arxiv.org/abs/2308.15570
Autor:
Koolstra, G., Stevenson, N., Barzili, S., Burns, L., Siva, K., Greenfield, S., Livingston, W., Hashim, A., Naik, R. K., Kreikebaum, J. M., O'Brien, K. P., Santiago, D. I., Dressel, J., Siddiqi, I.
Weak measurements of a superconducting qubit produce noisy voltage signals that are weakly correlated with the qubit state. To recover individual quantum trajectories from these noisy signals, traditional methods require slow qubit dynamics and subst
Externí odkaz:
http://arxiv.org/abs/2108.12023
Autor:
Vincentelli, F. M., Casella, P., Russell, D., Baglio, M. C., Veledina, A., Maccarone, T., Malzac, J., Fender, R., O'Brien, K., Uttley, P.
We present the results regarding the analysis of the fast X-ray/infrared (IR) variability of the black-hole transient MAXI J1535$-$571. The data studied in this work consist of two strictly simultaneous observations performed with XMM-Newton (X-rays:
Externí odkaz:
http://arxiv.org/abs/2102.06710
Autor:
Morvan, A., Ramasesh, V. V., Blok, M. S., Kreikebaum, J. M., O'Brien, K., Chen, L., Mitchell, B. K., Naik, R. K., Santiago, D. I., Siddiqi, I.
Publikováno v:
Phys. Rev. Lett. 126, 210504 (2021)
Ternary quantum processors offer significant computational advantages over conventional qubit technologies, leveraging the encoding and processing of quantum information in qutrits (three-level systems). To evaluate and compare the performance of suc
Externí odkaz:
http://arxiv.org/abs/2008.09134
Autor:
Dodkins, R. H., Davis, K., Lewis, B., Mahashabde, S., Mazin, B. A., Lipartito, I. A., Fruitwala, N., O'Brien, K., Thatte, N.
Optical and near-infrared Microwave Kinetic Inductance Detectors, or MKIDs, are low-temperature detectors with inherent spectral resolution that are able to instantly register individual photons with potentially no false counts or readout noise. Thes
Externí odkaz:
http://arxiv.org/abs/2007.15274
Autor:
Blok, M. S., Ramasesh, V. V., Schuster, T., O'Brien, K., Kreikebaum, J. M., Dahlen, D., Morvan, A., Yoshida, B., Yao, N. Y., Siddiqi, I.
Publikováno v:
Phys. Rev. X 11, 021010 (2021)
The theory of quantum information provides a common language which links disciplines ranging from cosmology to condensed-matter physics. For example, the delocalization of quantum information in strongly-interacting many-body systems, known as quantu
Externí odkaz:
http://arxiv.org/abs/2003.03307
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Autor:
Vincentelli, F. M., Casella, P., Petrucci, P., Maccarone, T., Russell, D., Uttley, P., De Marco, B., Fender, R., Gandhi, P., Malzac, J., O'Brien, K., Tomsick, J.
We present results from the first multi-epoch X-ray/IR fast-photometry campaign on the black-hole transient GX 339--4, during its 2015 outburst decay. We studied the evolution of the power spectral densities finding strong differences between the two
Externí odkaz:
http://arxiv.org/abs/1911.06332
Publikováno v:
Supercond. Sci. Technol. 33 06LT02 (2020)
Quantum bits, or qubits, are an example of coherent circuits envisioned for next-generation computers and detectors. A robust superconducting qubit with a coherent lifetime of $O$(100 $\mu$s) is the transmon: a Josephson junction functioning as a non
Externí odkaz:
http://arxiv.org/abs/1909.09165