Results 51 to 60 of about 31,457 (170)
Reversing the Weak Quantum Measurement for a Photonic Qubit
, 2009 We demonstrate the conditional reversal of a weak (partial-collapse) quantum measurement on a photonic qubit. The weak quantum measurement causes a nonunitary transformation of a qubit which is subsequently reversed to the original state after a ...
Cho, Young-Wook +3 more
core +1 more source
PRX QuantumThe tomography of single-particle-resolved detectors is of primary importance for characterizing particle correlations, with applications in quantum metrology, quantum simulation, and quantum computing. However, it is a nontrivial task in practice due to
Maxime Allemand +6 more
doaj +1 more source
Loss-tolerant measurement-device-independent quantum random number generation
New Journal of Physics, 2015 Quantum random number generators (QRNGs) output genuine random numbers based upon the uncertainty principle. A QRNG contains two parts in general—a randomness source and a readout detector.
Zhu Cao, Hongyi Zhou, Xiongfeng Ma
doaj +1 more source
Pauli Tomography: complete characterization of a single qubit device [PDF]
, 2002 The marriage of Quantum Physics and Information Technology, originally motivated by the need for miniaturization, has recently opened the way to the realization of radically new information-processing devices, with the possibility of guaranteed secure ...
D'Ariano, Giacomo Mauro +3 more
core +1 more source
Tomography of photon-number resolving continuous-output detectors
New Journal of Physics, 2015 We report a comprehensive approach to analysing continuous-output photon detectors. We employ principal component analysis to maximize the information extracted from output signals, followed by a novel noise-tolerant parameterized approach to the ...
Peter C Humphreys +9 more
doaj +1 more source
Universal framework for simultaneous tomography of quantum states and SPAM noise [PDF]
QuantumWe present a general denoising algorithm for performing $\textit{simultaneous tomography}$ of quantum states and measurement noise. This algorithm allows us to fully characterize state preparation and measurement (SPAM) errors present in any quantum ...
Abhijith Jayakumar +5 more
doaj +1 more source
Gradient-descent methods for scalable quantum detector tomography
New Journal of PhysicsWe present a technique for performing quantum detector tomography of phase insensitive quantum detectors, a category under which many detectors of interest fall under, using gradient descent-based optimization to learn the positive operator-valued ...
Amanuel Anteneh, Olivier Pfister
doaj +1 more source
Projecting onto any two-photon polarization state using linear optics
New Journal of Physics, 2018 Projectors are a simple but powerful tool for manipulating and probing quantum systems. For instance, projecting two-qubit systems onto maximally entangled states can enable quantum teleportation.
G S Thekkadath +4 more
doaj +1 more source
Iterative maximum-likelihood reconstruction in quantum homodyne tomography
, 2003 I propose an iterative expectation maximization algorithm for reconstructing a quantum optical ensemble from a set of balanced homodyne measurements performed on an optical state.
?ehá?ek J +16 more
core +2 more sources
Cancer Imaging, 2023 Background Excellent image quality is crucial for workup of hepatocellular carcinoma (HCC) in patients with liver cirrhosis because a signature tumor signal allows for non-invasive diagnosis without histologic proof.
Dirk Graafen +8 more
doaj +1 more source