Results 1 to 10 of about 13 (13)
Sequential measurements of non-commuting observables with quantum controlled interactions
New Journal of Physics, 2014 The origin of non-classical correlations is difficult to identify since the uncertainty principle requires that information obtained about one observable invariably results in the disturbance of any other non-commuting observable.
Holger F Hofmann
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Extracting the physical sector of quantum states
New Journal of Physics, 2017 The physical nature of any quantum source guarantees the existence of an effective Hilbert space of finite dimension, the physical sector, in which its state is completely characterized with arbitrarily high accuracy.
D Mogilevtsev +8 more
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Mutually unbiased measurements in finite dimensions
New Journal of Physics, 2014 We generalize the concept of mutually unbiased bases (MUB) to measurements which are not necessarily described by rank one projectors. As such, these measurements can be a useful tool to study the long-standing problem of the existence of MUB.
Amir Kalev, Gilad Gour
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Implementation of quantum state tomography for time-bin qudits
New Journal of Physics, 2017 Quantum state tomography (QST) is an essential tool for characterizing an unknown quantum state. Recently, QST has been performed for entangled qudits based on orbital angular momentum, time-energy uncertainty, and frequency bins.
Takuya Ikuta, Hiroki Takesue
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Fidelity-optimized quantum state estimation
New Journal of Physics, 2015 We describe an optimized, self-correcting procedure for the Bayesian inference of pure quantum states. By analyzing the history of measurement outcomes at each step, the procedure returns the most likely pure state, as well as the optimal basis for the ...
Amir Kalev, Itay Hen
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Tomography of a multimode quantum black box
New Journal of Physics, 2015 We report a technique for experimental characterization of an M -mode quantum optical process, generalizing the single-mode coherent-state quantum-process tomography method [ 1 , 2 ].
Ilya A Fedorov +3 more
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Experimental quantum tomography of a homodyne detector
New Journal of Physics, 2017 We suggest and demonstrate a tomographic method to characterise homodyne detectors at the quantum level. The positive operator measure associated with the detector is expanded in a quadrature basis and probed with a set of coherent states.
Samuele Grandi +3 more
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Optimization of a solid-state electron spin qubit using gate set tomography
New Journal of Physics, 2016 State of the art qubit systems are reaching the gate fidelities required for scalable quantum computation architectures. Further improvements in the fidelity of quantum gates demands characterization and benchmarking protocols that are efficient ...
Juan P Dehollain +10 more
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Continuous matrix product state tomography of quantum transport experiments
New Journal of Physics, 2015 In recent years, a close connection between the description of open quantum systems, the input–output formalism of quantum optics, and continuous matrix product states (cMPS) in quantum field theory has been established.
G Haack +3 more
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New Journal of Physics, 2015 We characterize correlations in polarization and time of photon pairs generated from a cold cloud of ^87 Rb atoms via a four-wave mixing process in a cascade level scheme.
Gurpreet Kaur Gulati +4 more
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