Results 51 to 60 of about 399,599 (194)

Characterising memory in quantum channel discrimination via constrained separability problems [PDF]

Quantum
Quantum memories are a crucial precondition in many protocols for processing quantum information. A fundamental problem that illustrates this statement is given by the task of channel discrimination, in which an unknown channel drawn from a known random ...
Ties-Albrecht Ohst, Shijun Zhang, Hai Chau Nguyen, Martin Plávala, Marco Túlio Quintino   +4 more
doaj   +1 more source

Implementation and characterization of a controllable dephasing channel based on coupling polarization and spatial degrees of freedom of light

, 2017
We present the experimental implementation and theoretical model of a controllable dephasing quantum channel using photonic systems. The channel is implemented by coupling the polarization and the spatial distribution of light, that play, in the ...
Calderón-Losada, Omar, Nuñez, Mayerlin, Svozilík, Jiří, Urrego, Daniel F., Valencia, Alejandra, Álvarez, Juan-Rafael   +5 more
core   +1 more source

Solving Quantum Channel Discrimination Problem With Quantum Networks and Quantum Neural Networks

IEEE Access, 2019
Distinguishing one quantum channel from another becomes a next natural question following the advent of quantum state discrimination. Here, we address the problem of quantum channel discrimination with the separable states and the entangled states input.
Peng-Hui Qiu, Xiao-Guang Chen, Yi-Wei Shi   +2 more
doaj   +1 more source

Quantum identification system

, 1998
A secure quantum identification system combining a classical identification procedure and quantum key distribution is proposed. Each identification sequence is always used just once and new sequences are ``refuelled'' from a shared provably secret key ...
A.K. Ekert, A.K. Ekert, C. Crépeau, C. Crépeau, C. Crépeau, C. Fuchs, C. H. Bennett, C.H. Bennett, C.H. Bennett, C.H. Bennett, C.H. Bennett, C.H. Bennett, D.R. Stinson, D.S. Mitrinović, G. Brassard, G. Brassard, J.I. Cirac, M. Hendrych, Martin Hendrych, Miloslav Dušek, N. Lütkenhaus, N. Lütkenhaus, Ondřej Haderka, Robert Myška, T. Beth   +24 more
core   +1 more source

Quantum Channel Capacities

, 2010
A quantum communication channel can be put to many uses: it can transmit classical information, private classical information, or quantum information. It can be used alone, with shared entanglement, or together with other channels.
Smith, Graeme
core   +1 more source

Fluctuation Theorems for a Quantum Channel

Physical Review X, 2019
We establish the general framework of quantum fluctuation theorems by finding the symmetry between the forward and backward transitions of any given quantum channel.
Hyukjoon Kwon, M. S. Kim
doaj   +1 more source

Potential capacities of quantum channels

, 2016
We introduce potential capacities of quantum channels in an operational way and provide upper bounds for these quantities, which quantify the ultimate limit of usefulness of a channel for a given task in the best possible context.
Winter, Andreas, Yang, Dong
core   +1 more source

Visually quantifying single-qubit quantum memory

Physical Review Research
To store quantum information, quantum memory plays a central intermediate ingredient in a network. The minimal criterion for a reliable quantum memory is the maintenance of the entangled state, which can be described by the non-entanglement-breaking (non-
Wan-Guan Chang, Chia-Yi Ju, Guang-Yin Chen, Yueh-Nan Chen, Huan-Yu Ku   +4 more
doaj   +1 more source

Noisy quantum Monty Hall game

, 2009
The influence of spontaneous emission channel and generalized Pauli channel on quantum Monty Hall Game is analysed. The scheme of Flittney and Abbott is reformulated using the formalism of density matrices.
D'Ariano G. M., Flitney A. P., Hayashi M., PIOTR GAWRON, Zander C.   +4 more
core   +1 more source

Improved Digital Quantum Simulation by Non-Unitary Channels [PDF]

, 2023
WY Gong, Yaroslav Kharkov, Minh C. Tran, Przemysław Bienias, Alexey V. Gorshkov   +4 more
openalex   +1 more source