Results 11 to 20 of about 378,715 (336)
Quantum Feedback Channels [PDF]
IEEE Transactions on Information Theory, 2004 In Shannon information theory the capacity of a memoryless communication channel cannot be increased by the use of feedback. In quantum information theory the no-cloning theorem means that noiseless copying and feedback of quantum information cannot be ...
Bowen, Garry
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Quantum Channel Capacities [PDF]
2010 IEEE Information Theory Workshop, 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
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Quantum Information Processing, 2021 The reliability of quantum channels for transmitting information is of profound importance from the perspective of quantum information. This naturally leads to the question as how well a quantum state is preserved when subjected to a quantum channel. We propose a measure of quantumness of channels based on non-commutativity of quantum states that is ...
Javid Naikoo +2 more
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Interference of Quantum Channels [PDF]
Physical Review Letters, 2003 4 pages, 5 figures, REVTeX 4, typographical corrections and added ...
Daniel K. L. Oi
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Quasirandom quantum channels [PDF]
Quantum, 2020 Mixing (or quasirandom) properties of the natural transition matrix associated to a graph can be quantified by its distance to the complete graph. Different mixing properties correspond to different norms to measure this distance. For dense graphs, two such properties known as spectral expansion and uniformity were shown to be equivalent in seminal ...
Bannink, Tom +3 more
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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
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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
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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
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Quantum circuits for quantum channels [PDF]
Physical Review A, 2017 We study the implementation of quantum channels with quantum computers while minimizing the experimental cost, measured in terms of the number of Controlled-NOT (C-NOT) gates required (single-qubit gates are free). We consider three different models. In the first, the Quantum Circuit Model (QCM), we consider sequences of single-qubit and C-NOT gates ...
Iten, Raban +2 more
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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
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