Results 31 to 40 of about 31,457 (170)
Continuous-variable quantum process tomography with squeezed-state probes [PDF]
, 1987 We propose a procedure for tomographic characterization of continuous variable quantum operations which employs homodyne detection and single-mode squeezed probe states with a fixed degree of squeezing and anti-squeezing and a variable displacement and ...
Fiurasek, Jaromir
core +5 more sources
Optimization of Computed Tomography Data Acquisition by Means of Quantum Computing
Research and Review Journal of Nondestructive Testing, 2023 Quantum Computing (QC) technology has made tremendous progress recently. Today, first real QC systems are operational. The Fraunhofer Institute of Integrated Circuits IIS, Division Development Center X-ray Technology is participating in the project ...
Theobald O.J. Fuchs +10 more
doaj +1 more source
A simple minimax estimator for quantum states [PDF]
, 2012 Quantum tomography requires repeated measurements of many copies of the physical system, all prepared by a source in the unknown state. In the limit of very many copies measured, the often-used maximum-likelihood (ML) method for converting the gathered ...
BERTHOLD-GEORG ENGLERT +2 more
core +1 more source
Quantum-state tomography of complex multimode fields using array detectors [PDF]
Physical Review A, 2001 We demonstrate that it is possible to use the balanced homodyning with array detectors to measure the quantum state of correlated two-mode signal field. We show the applicability of the method to fields with complex mode functions, thus generalizing the work of Beck (Phys. Rev. Letts. 84, 5748 (2000)) in several important ways.
Sivakumar, S., Agarwal, G. S.
openaire +2 more sources
Measurement and control of spatial qubits generated by passing photons through double-slits [PDF]
, 2008 We present an experimental study of the non-classical correlations of a pair of spatial qubits formed by passing two down-converted photons through a pair of double slits.
Dougakiuchi, Tatsuo +6 more
core +1 more source
, 2013 Abstract As quantum detectors evolve to become ever more sophisticated, their description in terms of a limited number of generic parameters falls short. An alternative description of the performance of a detector is provided by its positive-operator-valued measure (POVM).
Zhang, L +3 more
openaire +1 more source
Quantum Calibration of Photon-Number-Resolving Detectors Based on Multi-Pixel Photon Counters
Applied Sciences, 2019 In this paper, we reconstructed the positive operator-valued measure (POVM) of a photon-number-resolving detector (PNRD) based on a multi-pixel photon counter (MPPC) by means of quantum detector tomography (QDT) at 791 nm and 523 nm, respectively.
Yujie Cai +7 more
doaj +1 more source
Implementing and Characterizing Precise Multiqubit Measurements
Physical Review X, 2016 There are two general requirements to harness the computational power of quantum mechanics: the ability to manipulate the evolution of an isolated system and the ability to faithfully extract information from it.
J. Z. Blumoff +14 more
doaj +1 more source
High-rate, high-fidelity entanglement of qubits across an elementary quantum network
, 2020 We demonstrate remote entanglement of trapped-ion qubits via a quantum-optical fiber link with fidelity and rate approaching those of local operations.
An, S +9 more
core +1 more source
Diagnostics, 2023 Photon-counting detector computed tomography (PCD-CT) yields improved spatial resolution. The combined use of PCD-CT and a modern iterative reconstruction method, known as quantum iterative reconstruction (QIR), has the potential to significantly improve
Dirk Graafen +8 more
doaj +1 more source