Results 31 to 40 of about 60,354 (258)
Quantum process tomography of a high-dimensional quantum communication channel [PDF]
Quantum, 2019 The characterization of quantum processes, e.g. communication channels, is an essential ingredient for establishing quantum information systems. For quantum key distribution protocols, the amount of overall noise in the channel determines the rate at ...
Frédéric Bouchard +7 more
doaj +1 more source
Quantum process tomography by 2D fluorescence spectroscopy [PDF]
The Journal of Chemical Physics, 2015 Reconstruction of the dynamics (quantum process tomography) of the single-exciton manifold in energy transfer systems is proposed here on the basis of two-dimensional fluorescence spectroscopy (2D-FS) with phase-modulation. The quantum-process-tomography protocol introduced here benefits from, e.g., the sensitivity enhancement ascribed to 2D-FS ...
Leonardo A. Pachón +2 more
openaire +4 more sources
Simple representation of quantum process tomography [PDF]
Physical Review A, 2009 We show that the Fano representation leads to a particularly simple and appealing form of the quantum process tomography matrix $ _{_F}$, in that the matrix $ _{_F}$ is real, the number of matrix elements is exactly equal to the number of free parameters required for the complete characterization of a quantum operation, and these matrix elements are ...
BENENTI, GIULIANO, G. Strini
openaire +4 more sources
Self-guided quantum state tomography for limited resources
Scientific Reports, 2022 Quantum state tomography is a process for estimating an unknown quantum state; which is innately probabilistic. The exponential growth of unknown parameters to be estimated is a fundamental difficulty in realizing quantum state tomography for higher ...
Syed Tihaam Ahmad +2 more
doaj +1 more source
Simplified quantum process tomography
New Journal of Physics, 2009 We propose and evaluate experimentally an approach to quantum process tomography that completely removes the scaling problem plaguing the standard approach. The key to this simplification is the incorporation of prior knowledge of the class of physical interactions involved in generating the dynamics, which reduces the problem to one of parameter ...
Branderhorst, M +3 more
openaire +3 more sources
Partial standard quantum process tomography [PDF]
Quantum Information Processing, 2012 4 pages, no ...
Wu, Xiaohua, Xu, Ke
openaire +3 more sources
Maximum-likelihood coherent-state quantum process tomography
New Journal of Physics, 2012 Coherent-state quantum process tomography (csQPT) is a method for completely characterizing a quantum-optical ‘black box’ by probing it with coherent states and carrying out homodyne measurements on the output (Lobino et al 2008 Science 322 563).
Aamir Anis, A I Lvovsky
doaj +1 more source
Quantum Process Tomography: Resource Analysis of Different Strategies [PDF]
, 2007 Characterization of quantum dynamics is a fundamental problem in quantum physics and quantum information science. Several methods are known which achieve this goal, namely Standard Quantum Process Tomography (SQPT), Ancilla-Assisted Process Tomography ...
A. S. Holevo +14 more
core +2 more sources
Quantum gate characterization in an extended Hilbert space [PDF]
, 2004 We describe an approach for characterizing the process of quantum gates using quantum process tomography, by first modeling them in an extended Hilbert space, which includes non-qubit degrees of freedom.
G. J. Pryde +5 more
core +3 more sources
Universal compilation for quantum state tomography
Scientific Reports, 2023 Universal compilation is a training process that compiles a trainable unitary into a target unitary. It has vast potential applications from depth-circuit compressing to device benchmarking and quantum error mitigation.
Vu Tuan Hai, Le Bin Ho
doaj +1 more source