Zobrazeno 1 - 10
of 1 342
pro vyhledávání: '"Higgins, B."'
Autor:
Erven, C., Meyer-Scott, E., Fisher, K., Lavoie, J., Higgins, B. L., Yan, Z., Pugh, C. J., Bourgoin, J. -P., Prevedel, R., Shalm, L. K., Richards, L., Gigov, N., Laflamme, R., Weihs, G., Jennewein, T., Resch, K. J.
Publikováno v:
Nature Photonics 8, 292-296 (2014)
Quantum correlations are critical to our understanding of nature, with far-reaching technological and fundamental impact. These often manifest as violations of Bell's inequalities, bounds derived from the assumptions of locality and realism, concepts
Externí odkaz:
http://arxiv.org/abs/1309.1379
Autor:
Bourgoin, J. -P., Meyer-Scott, E., Higgins, B. L., Helou, B., Erven, C., Huebel, H., Kumar, B., Hudson, D., D'Souza, I., Girard, R., Laflamme, R., Jennewein, T.
Publikováno v:
New J. Phys. 15, 023006 (2013)
Optical quantum communication utilizing satellite platforms has the potential to extend the reach of quantum key distribution (QKD) from terrestrial limits of ~200 km to global scales. We have developed a thorough numerical simulation using realistic
Externí odkaz:
http://arxiv.org/abs/1211.2733
Publikováno v:
Physical Review A 91, 012113 (2015)
Bipartite quantum entangled systems can exhibit measurement correlations that violate Bell inequalities, revealing the profoundly counter-intuitive nature of the physical universe. These correlations reflect the impossibility of constructing a joint
Externí odkaz:
http://arxiv.org/abs/1112.3664
Publikováno v:
Phys. Rev. A 83, 052314 (2011)
We theoretically investigate schemes to discriminate between two nonorthogonal quantum states given multiple copies. We consider a number of state discrimination schemes as applied to nonorthogonal, mixed states of a qubit. In particular, we examine
Externí odkaz:
http://arxiv.org/abs/1012.3525
Publikováno v:
Nature Photonics 5, 43 (2011)
The high-precision interferometric measurement of an unknown phase is the basis for metrology in many areas of science and technology. Quantum entanglement provides an increase in sensitivity, but present techniques have only surpassed the limits of
Externí odkaz:
http://arxiv.org/abs/1003.5213
Publikováno v:
Phys. Rev. Lett. 103, 220503 (2009)
We present theory and experiment for the task of discriminating two nonorthogonal states, given multiple copies. We implement several local measurement schemes, on both pure states and states mixed by depolarizing noise. We find that schemes which ar
Externí odkaz:
http://arxiv.org/abs/0909.1572
Publikováno v:
Phys. Rev. A 80, 052114 (2009)
We present the theory of how to achieve phase measurements with the minimum possible variance in ways that are readily implementable with current experimental techniques. Measurements whose statistics have high-frequency fringes, such as those obtain
Externí odkaz:
http://arxiv.org/abs/0907.0014
Publikováno v:
IEEE J. Sel. Top. Quantum Electron., 15, 1661-1672 (2009)
Adaptive techniques make practical many quantum measurements that would otherwise be beyond current laboratory capabilities. For example: they allow discrimination of nonorthogonal states with a probability of error equal to the Helstrom bound; they
Externí odkaz:
http://arxiv.org/abs/0904.2045
Publikováno v:
New J. Phys. 11, 073023 (2009)
We derive, and experimentally demonstrate, an interferometric scheme for unambiguous phase estimation with precision scaling at the Heisenberg limit that does not require adaptive measurements. That is, with no prior knowledge of the phase, we can ob
Externí odkaz:
http://arxiv.org/abs/0809.3308
Publikováno v:
Nature.450:393-396,2007
Measurement underpins all quantitative science. A key example is the measurement of optical phase, used in length metrology and many other applications. Advances in precision measurement have consistently led to important scientific discoveries. At t
Externí odkaz:
http://arxiv.org/abs/0709.2996