Results 21 to 30 of about 4,287,757 (400)
Interference of Quantum Channels [PDF]
Physical Review Letters, 2003 4 pages, 5 figures, REVTeX 4, typographical corrections and added ...
Daniel K. L. Oi
openaire +7 more sources
Activation of zero-error classical capacity in low-dimensional quantum systems [PDF]
Phys. Rev. A 97, 062314 (2018), 2018 Channel capacities of quantum channels can be nonadditive even if one of two quantum channels has no channel capacity. We call this phenomenon \emph{activation} of the channel capacity. In this paper, we show that when we use a quantum channel on a qubit
Heo, Jun, Park, Jeonghoon
core +2 more sources
Geometric distinguishability measures limit quantum channel estimation and discrimination [PDF]
Quantum Information Processing, 2020 Quantum channel estimation and discrimination are fundamentally related information processing tasks of interest in quantum information science. In this paper, we analyze these tasks by employing the right logarithmic derivative Fisher information and ...
Vishal Katariya, M. Wilde
semanticscholar +1 more source
Quantum Optimal Transport with Quantum Channels [PDF]
Annales Henri Poincaré, 2021 We propose a new generalization to quantum states of the Wasserstein distance, which is a fundamental distance between probability distributions given by the minimization of a transport cost. Our proposal is the first where the transport plans between quantum states are in natural correspondence with quantum channels, such that the transport can be ...
De Palma, G, Trevisan, D
openaire +5 more sources
Time-varying quantum channel models for superconducting qubits
npj Quantum Information, 2021 The decoherence effects experienced by the qubits of a quantum processor are generally characterized using the amplitude damping time ( T 1 ) and the dephasing time ( T 2 ).
Josu Etxezarreta Martinez +3 more
semanticscholar +1 more source
Usefulness of adaptive strategies in asymptotic quantum channel discrimination [PDF]
Physical Review A, 2020 Adaptiveness is a key principle in information processing including statistics and machine learning. We investigate the usefulness of adaptive methods in the framework of asymptotic binary hypothesis testing, when each hypothesis represents ...
Farzin Salek +2 more
semanticscholar +1 more source
Quantumness of quantum channels [PDF]
Physical Review A, 2018 Quantum coherence is a fundamental aspect of quantum physics and plays a central role in quantum information science. This essential property of the quantum states could be fragile under the influence of the quantum operations. The extent to which quantum coherence is diminished depends both on the channel and the incoherent basis.
Seyed Javad Akhtarshenas +1 more
openaire +3 more sources
Quantum Channel State Masking [PDF]
Information Theory Workshop, 2020 Communication over a quantum channel that depends on a quantum state is considered, when the encoder has channel side information (CSI) and is required to mask information on the quantum channel state from the decoder.
Uzi Pereg, C. Deppe, H. Boche
semanticscholar +1 more source
Quantum channels in quantum gravity [PDF]
International Journal of Modern Physics D, 2014 The black hole final state proposal implements manifest unitarity in the process of black hole formation and evaporation in quantum gravity, by postulating a unique final state boundary condition at the singularity. We argue that this proposal can be embedded in the gauge/gravity context by invoking a path integral formalism inspired by the Schwinger ...
Rangamani, Mukund, Rota, Massimilliano
openaire +4 more sources
Channeling Quantum Criticality
Physical Review Letters, 2023 We analyze the effect of decoherence, modelled by local quantum channels, on quantum critical states and we find universal properties of the resulting mixed state's entanglement, both between system and environment and within the system. Renyi entropies exhibit volume law scaling with a subleading constant governed by a "$g$-function" in conformal ...
Yijian Zou +2 more
openaire +3 more sources