Results 41 to 50 of about 1,399,436 (192)
, 2016 Quantum metrology exploits entangled states of particles to improve sensing precision beyond the limit achievable with uncorrelated particles. All previous methods required detection noise levels below this standard quantum limit to realize the benefits ...
Engelsen, N. J. +3 more
core +1 more source
Tilt Measurement at the Quantum Cramer–Rao Bound Using a Higher-Order Hermite–Gaussian Mode
Photonics, 2023 The quantum Cramer–Rao bound (QCRB) provides an ultimate precision limit in parameter estimation. The sensitivity of spatial measurements can be improved by using the higher-order Hermite–Gaussian mode.
Zhi Li +4 more
doaj +1 more source
Physical Review LettersNotions of nonstabilizerness, or “magic,” quantify how nonclassical quantum states are in a precise sense: states exhibiting low nonstabilizerness preclude quantum advantage. We introduce “pseudomagic” ensembles of quantum states that, despite low nonstabilizerness, are computationally indistinguishable from those with high nonstabilizerness ...
Gu A. +5 more
openaire +4 more sources
Micromachines, 2022 The performance improvement of an all-solid-state single-frequency continuous-wave (CW) laser with high output power is presented in this paper, which is implemented by employing a temperature control system based on machine learning to control the ...
Haoming Qiao +4 more
doaj +1 more source
Establishing and storing of deterministic quantum entanglement among three distant atomic ensembles
Nature Communications, 2017 Continuous-variable encoding is a promising approach for quantum information and communication networks. Here, the authors show how to map entanglement from three spatial optical modes to three separated atomic samples via electromagnetically induced ...
Zhihui Yan +8 more
doaj +1 more source
A Multi-Pass Optically Pumped Rubidium Atomic Magnetometer with Free Induction Decay
Sensors, 2022 A free-induction-decay (FID) type optically-pumped rubidium atomic magnetometer driven by a radio-frequency (RF) magnetic field is presented in this paper.
Lulu Zhang +4 more
doaj +1 more source
Teleportation of quantum states [PDF]
Physical Review A, 1994 Bennett et al. (PRL 70, 1859 (1993)) have shown how to transfer ("teleport") an unknown spin quantum state by using prearranged correlated quantum systems and transmission of classical information. I will show how their results can be obtained in the framework of nonlocal measurements proposed by Aharonov and Albert I will generalize the latter to the ...
openaire +3 more sources
Quantum Neuromorphic Platform for Quantum State Preparation [PDF]
Physical Review Letters, 2019 We develop a scheme of quantum reservoir state preparation, based on a quantum neural network framework, which takes classical optical excitation as input and provides desired quantum states as output. We theoretically demonstrate the broad potential of our scheme by explicitly preparing a range of intriguing quantum states, including single-photon ...
Sanjib Ghosh +2 more
openaire +3 more sources
Transforming Bell's Inequalities into State Classifiers with Machine Learning
, 2017 Quantum information science has profoundly changed the ways we understand, store, and process information. A major challenge in this field is to look for an efficient means for classifying quantum state. For instance, one may want to determine if a given
Ma, Yue-Chi, Yung, Man-Hong
core +2 more sources
Shapes of quantum states [PDF]
Journal of Physics A: Mathematical and General, 2003 The shape space of k labelled points on a plane can be identified with the space of pure quantum states of dimension k-2. Hence, the machinery of quantum mechanics can be applied to the statistical analysis of planar configurations of points. Various correspondences between point configurations and quantum states, such as linear superposition as well ...
openaire +4 more sources