Zobrazeno 1 - 10
of 144
pro vyhledávání: '"Björk, Gunnar"'
Publikováno v:
Phys. Rev. A 102, 052616 (2020)
We present an experimental realization of a 16 element, temporal-array, photon-number-resolving (PNR) detector, which is a multiplexed single-photon detector that splits an input signal over multiple time-bins, and the time-bins are detected using tw
Externí odkaz:
http://arxiv.org/abs/2009.08334
Autor:
Jönsson, Mattias, Björk, Gunnar
Publikováno v:
J. Phys. Photon. 2, 045008 (2020)
We analyse the capability of distinguishing between different intensities in a monochromatic, pixellated image acquisition system at low light intensities. In practice, the latter means that each pixel detects a countable number of photons per acquir
Externí odkaz:
http://arxiv.org/abs/2003.14077
Autor:
Jönsson, Mattias, Björk, Gunnar
Publikováno v:
Phys. Rev. A 101, 013815 (2020)
We derive a computationally efficient expression of the photon counting distribution for a uniformly illuminated array of single photon detectors. The expression takes the number of single detectors, their quantum efficiency, and their dark-count rat
Externí odkaz:
http://arxiv.org/abs/1910.02679
Autor:
Jönsson, Mattias, Björk, Gunnar
Publikováno v:
Phys. Rev. A 99, 043822 (2019)
We analyze the performance of photon-number-resolving (PNR) detectors and introduce a figure of merit for the accuracy of such detectors. This figure of merit is the (worst-case) probability that the photon-number-resolving detector correctly predict
Externí odkaz:
http://arxiv.org/abs/1812.05422
Publikováno v:
Phys. Rev. A 96, 033840 (2017)
We experimentally investigate various quantum polarization features of three-photon quantum states, including product and entangled states with varying purity. The three-photon quantum states are categorized into six classes based on the rotation sym
Externí odkaz:
http://arxiv.org/abs/1706.07755
Autor:
Jöns, Klaus D., Stensson, Katarina, Reindl, Marcus, Swillo, Marcin, Huo, Yongheng, Zwiller, Val, Rastelli, Armando, Trotta, Rinaldo, Björk, Gunnar
Publikováno v:
Phys. Rev. B 96, 075430 (2017)
We investigate the effect of blinking on the two-photon interference measurement from two independent quantum emitters. We find that blinking significantly alters the statistics in the second-order intensity correlation function g$^{(2)}(\tau)$ and t
Externí odkaz:
http://arxiv.org/abs/1702.03278
Autor:
Almlöf, Jonas, Björk, Gunnar
Publikováno v:
Quantum Information and Computation 13, 0009 (2013)
We discuss the fidelity as a figure of merit in quantum error correction schemes. We show that when identifiable but uncorrectable errors occur as a result of the action of the channel, a common strategy that improves the fidelity actually decreases
Externí odkaz:
http://arxiv.org/abs/1610.03682
Publikováno v:
Phys. Rev. A 94, 020105 (2016)
We propose and demonstrate a method for quantum-state tomography of qudits encoded in the quantum polarization of $N$-photon states. This is achieved by distributing $N$ photons nondeterministically into three paths and their subsequent projection, w
Externí odkaz:
http://arxiv.org/abs/1605.08287
Autor:
Shabbir, Saroosh, Björk, Gunnar
Publikováno v:
Phys. Rev. A 93, 052101 (2016)
Although progress has been made recently in defining nontrivial uncertainty limits for the SU(2) group, a description of the intermediate states bound by these limits remains lacking. In this paper we enumerate possible uncertainty relations for the
Externí odkaz:
http://arxiv.org/abs/1602.08909
In this short note we derive an approximate expression for the mode density of modes carrying orbital angular momentum (OAM) in a cylindrical cavity which is large compared to the inverse wavevector in any direction. We argue that in the large cavity
Externí odkaz:
http://arxiv.org/abs/1502.07902