Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Yink Loong Len"'
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-15 (2022)
The effects of detection noise on quantum metrology performances have not been rigorously investigated yet. Here, the authors fill this gap by generalising the quantum Fisher information to the case of noisy readout, and showing the consequences the
Externí odkaz:
https://doaj.org/article/5c3e880c523540718e67fd5c4fa5ec07
Autor:
Yink Loong Len
Publikováno v:
New Journal of Physics, Vol 24, Iss 3, p 033037 (2022)
Quantum estimation involving multiple parameters remains an important problem of both theoretical and practical interest. In this work, we study the problem of simultaneous estimation of two parameters that are respectively associate with the length
Externí odkaz:
https://doaj.org/article/28c06206b41640918ce8b4d50c85231b
Publikováno v:
New Journal of Physics, Vol 15, Iss 6, p 063011 (2013)
We report a controllable method for producing mixed two-photon states via spontaneous parametric down-conversion with a two-type-I crystal geometry. By using variable polarization rotators (VPRs), one obtains mixed states of various purities and degr
Externí odkaz:
https://doaj.org/article/0a120cd7404a4c8388fcaa06dd7406e4
Publikováno v:
Nature Communications. 13
The impact of measurement imperfections on quantum metrology protocols has not been approached in a systematic manner so far. In this work, we tackle this issue by generalising firstly the notion of quantum Fisher information to account for noisy det
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::23667075e43d4dc75e3967739a8f6095
https://doi.org/10.1038/s41467-022-33563-8
https://doi.org/10.1038/s41467-022-33563-8
Autor:
Yink Loong Len
Quantum estimation involving multiple parameters remains an important problem of both theoretical and practical interest. In this work, we study the problem of simultaneous estimation of two parameters that are respectively associate with the length
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::23726fcc8ee400d37be0dd9542b7d6ee
Autor:
Marcin Jarzyna, Konrad Banaszek, Karol Łukanowski, Yink Loong Len, Chandan Datta, Jan Kołodyński
Publikováno v:
Physical Review A. 102
Conventional incoherent imaging based on measuring the spatial intensity distribution in the image plane faces the resolution hurdle described by the Rayleigh diffraction criterion. Here, we demonstrate theoretically using the concept of the Fisher i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::634fc502feb0bb24c267b9e370c3e383
https://doi.org/10.1103/physreva.102.063526
https://doi.org/10.1103/physreva.102.063526
Publikováno v:
Optics Express. 29:35592
We investigate theoretically coherent detection implemented simultaneously on a set of mutually orthogonal spatial modes in the image plane as a method to characterize properties of a composite thermal source below the Rayleigh limit. A general relat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41fda502a1a3e8b19c88afaa8efa01e8
https://doi.org/10.1364/oe.433990
https://doi.org/10.1364/oe.433990
We stand by our findings in Phys. Rev A. 96, 022126 (2017). In addition to refuting the invalid objections raised by Peleg and Vaidman, we report a retrocausation problem inherent in Vaidman's definition of the past of a quantum particle.
3 page
3 page
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::418fe44a507a3876ef30490f11947232
http://arxiv.org/abs/1901.05673
http://arxiv.org/abs/1901.05673
Publikováno v:
International Journal of Quantum Information. 18:1941015
We consider the problem of estimating the spatial separation between two mutually incoherent point light sources using the super-resolution imaging technique based on spatial mode demultiplexing with noisy detectors. We show that in the presence of n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15d7fc87a7a78b5da917fe2b4ebb632f
https://doi.org/10.1142/s0219749919410156
https://doi.org/10.1142/s0219749919410156
Autor:
Hui Khoon Ng, Yink Loong Len
We study the performance of quantum error correction (QEC) on a system undergoing open-system (OS) dynamics. The noise on the system originates from a joint quantum channel on the system-bath composite, a framework that includes and interpolates betw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9ef52f7cfe16a3d7ab7702c03b3bdec