Results 31 to 40 of about 386,203 (296)
Maximal Entropy Approach for Quantum State Tomography
PRX Quantum, 2021 Quantum computation has been growing rapidly in both theory and experiments. In particular, quantum computing devices with a large number of qubits have been developed by IBM, Google, IonQ, and others.
Rishabh Gupta +3 more
doaj +2 more sources
Concepts in quantum state tomography and classical implementation with intense light: a tutorial
Advances in Optics and Photonics, 2019 A tomographic measurement is a ubiquitous tool for estimating the properties of quantum states, and its application is known as quantum state tomography (QST).
E. Toninelli +8 more
semanticscholar +3 more sources
Quantum State Tomography Using Successive Measurements [PDF]
Journal of Physics A: Mathematical and Theoretical, 2012 We describe a quantum state tomography scheme which is applicable to a system described in a Hilbert space of arbitrary finite dimensionality and is constructed from sequences of two measurements.
Amiet J P +6 more
core +2 more sources
Quantum tomography for solid state qubits [PDF]
Europhysics Letters (EPL), 2004 We propose a method for the tomographic reconstruction of qubit states for a general class of solid state systems in which the Hamiltonians are represented by spin operators, e.g., with Heisenberg-, $XXZ$-, or XY- type exchange interactions.
+8 more
core +3 more sources
Quantum State Tomography via Reduced Density Matrices
Physical Review Letters, 2017 Quantum state tomography via local measurements is an efficient tool for characterizing quantum states. However it requires that the original global state be uniquely determined (UD) by its local reduced density matrices (RDMs). In this work we demonstrate for the first time a class of states that are UD by their RDMs under the assumption that the ...
Xin, Tao +9 more
openaire +7 more sources
Quantum State Tomography for Matrix Product Density Operators [PDF]
IEEE Transactions on Information Theory, 2023 The reconstruction of quantum states from experimental measurements, often achieved using quantum state tomography (QST), is crucial for the verification and benchmarking of quantum devices.
Zhen Qin +4 more
semanticscholar +1 more source
Adaptive quantum state tomography via weak value
Results in Physics, 2021 Quantum state tomography strategy via weak value is valid for arbitrary dimensional systems, and can be easily realized. However, the efficiency of quantum state tomography strategy via weak value is lower than that of the conventional quantum state ...
Xuanmin Zhu +5 more
doaj +1 more source
Quantum state tomography, entanglement detection and Bell violation prospects in weak decays of massive particles [PDF]
Journal of High Energy Physics, 2022 A rather general method for determining the spin density matrix of a multi-particle system from angular decay data is presented. The method is based on a Bloch parameterisation of the d -dimensional generalised Gell-Mann representation of ρ and exploits ...
Rachel Ashby-Pickering +2 more
semanticscholar +1 more source
An Improved Sample Complexity Lower Bound for (Fidelity) Quantum State Tomography [PDF]
Quantum, 2022 We show that Ω(rd/ϵ) copies of an unknown rank-r, dimension-d quantum mixed state are necessary in order to learn a classical description with 1–ϵ fidelity. This improves upon the tomography lower bounds obtained by Haah, et al.
H. Yuen
semanticscholar +1 more source
Efficient quantum state tomography with convolutional neural networks [PDF]
npj Quantum Information, 2021 Modern day quantum simulators can prepare a wide variety of quantum states but the accurate estimation of observables from tomographic measurement data often poses a challenge.
Tobias Schmale, M. Reh, M. Gärttner
semanticscholar +1 more source