Results 61 to 70 of about 31,457 (170)

An ultra-sensitive pulsed balanced homodyne detector: Application to time-domain quantum measurements

, 2001
A pulsed balanced homodyne detector has been developed for precise measurements of electric field quadratures of pulsed optical quantum states. A high level of common mode suppression (> 85 dB) and low electronic noise (730 electrons per pulse) provide a
A. I. Lvovsky, Anderson, Breitenbach, C. Hettich, Daly, D’Ariano, Foster, Furusawa, H. Hansen, Hirano, J. Mlynek, Lam, Lvovsky, Ou, P. Lodahl, S. Schiller, Schneider, Slusher, Smithey, Smithey, T. Aichele, Vasilyev, Wu, Yuen   +23 more
core   +2 more sources

Sampling functions for multimode homodyne tomography with a single local oscillator

, 2000
We derive various sampling functions for multimode homodyne tomography with a single local oscillator. These functions allow us to sample multimode s-parametrized quasidistributions, density matrix elements in Fock basis, and s-ordered moments of ...
A. Wünsche, C. T. Bodendorf, D. F. Mc.Alister, D. F. McAlister, D. Leibfried, D. T. Smithey, G. M. D’Ariano, G. M. D’Ariano, H. Kühn, Jaromír Fiurášek, K. Banaszek, K. E. Cahill, L. G. Lutterbach, M. G. Raymer, M. G. Raymer, M. Vasilyev, S. Schiller, S. Wallentowitz, T. J. Dunn, T. Opatrný, Th. Richter, Th. Richter, Th. Richter, Th. Richter, Th. Richter, U. Leonhardt, U. Leonhardt, U. Leonhardt, W. Vogel   +28 more
core   +1 more source

Minimum tomography of two entangled qutrits using local measurements of one-qutrit SIC-POVM

, 2013
An experimental demonstration of two-qutrit state tomography via one-qutrit symmetric informationally complete positive operator-valued measure (SIC-POVM) is presented.
Delgado, A., Maciel, T. O., Marques, B., Pimenta, W. M., Pádua, S., Saavedra, C., Vianna, R. O.   +6 more
core   +1 more source

Quantum detector tomography of a single-photon frequency upconversion detection system

Optics Express, 2016
We experimentally presented a full quantum detector tomography of a synchronously pumped infrared single-photon frequency upconversion detector. A maximum detection efficiency of 37.6% was achieved at the telecom wavelength of 1558 nm with a background noise about 1.0 × 10-3 counts/pulse. The corresponding internal quantum conversion efficiency reached
Jianhui, Ma, Xiuliang, Chen, Huiqin, Hu, Haifeng, Pan, E, Wu, Heping, Zeng   +5 more
openaire   +2 more sources

Readout error mitigated quantum state tomography tested on superconducting qubits

Communications Physics
Quantum technologies rely heavily on accurate control and reliable readout of quantum systems. Current experiments are limited by numerous sources of noise that can only be partially captured by simple analytical models and additional characterization of
Adrian Skasberg Aasen, Andras Di Giovanni, Hannes Rotzinger, Alexey V. Ustinov, Martin Gärttner   +4 more
doaj   +1 more source

Quantum Detector and Process Tomography: Algorithm Design and Optimisation

, 2023
This thesis develops new algorithms and investigates optimisation in quantum detector tomography (QDT) and quantum process tomography (QPT). QDT is a fundamental technique for calibrating quantum devices and performing quantum engineering tasks. We design optimal probe states based on the minimum upper bound of the mean squared error (UMSE) and the ...
openaire   +2 more sources

Modular and Cost-Effective Computed Tomography Design

Sensors
We present a modular and cost-effective gamma ray computed tomography system for multiphase flow investigations in industrial apparatuses. It mainly comprises a 137Cs isotopic source and an in-house-assembled detector arc, with a total of 16 ...
André Bieberle, Rainer Hoffmann, Alexander Döß, Eckhard Schleicher, Uwe Hampel   +4 more
doaj   +1 more source

Sequential measurement of conjugate variables as an alternative quantum state tomography

, 2013
It is shown how it is possible to reconstruct the initial state of a one-dimensional system by measuring sequentially two conjugate variables. The procedure relies on the quasi-characteristic function, the Fourier-transform of the Wigner quasi ...
Antonio Di Lorenzo, E. Arthurs, K. Husimi, W. Pauli   +3 more
core   +1 more source

Practical techniques for high-precision measurements on near-term quantum hardware and applications in molecular energy estimation

npj Quantum Information
Achieving high-precision measurements on near-term quantum devices is critical for advancing quantum computing applications. Quantum computers suffer from high readout errors, making quantum simulations with high accuracy requirements particularly ...
Keijo Korhonen, Hetta Vappula, Adam Glos, Marco Cattaneo, Zoltán Zimborás, Elsi-Mari Borrelli, Matteo A. C. Rossi, Guillermo García-Pérez, Daniel Cavalcanti   +8 more
doaj   +1 more source

Time resolution of the plastic scintillator strips with matrix photomultiplier readout for J-PET tomograph

, 2016
Recent tests of a single module of the Jagiellonian Positron Emission Tomography system (J-PET) consisting of 30 cm long plastic scintillator strips have proven its applicability for the detection of annihilation quanta (0.511 MeV) with a coincidence ...
3M Optical Systems, A Gajos, A Strzelecki, A Słomski, A Wieczorek, B Jasińska, D Alfs, D Kamińska, DeGroot M H, E Czerwiński, E Kubicz, Eljen Technology, Eriksson L, G Korcyl, General Electric, Hamamatsu, K Giergiel, L Raczyński, M Gorgol, M Pałka, M Silarski, M Zieliński, Mechler C L, Meijlink J R, Moskal P, Moskal P, Moskal P, Moszynski M, N G Sharma, N Zoń, Nickles R J, O Rundel, P Białas, P Kowalski, P Moskal, P Witkowski, Palka M, Philips, Saint Gobain Crystals, Schaart R D, Schaart R D, Seifert S, Spanoudaki V C, Surti S, Sz Niedźwiecki, Szymański K, T Bednarski, T Kozik, Townsend D W, W Krzemień, W Wiślicki, Z Rudy, Ł Kapłon   +52 more
core   +1 more source