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Shadow process tomography of quantum channels [PDF]
Physical Review A, 2021 Quantum process tomography is a critical capability for building quantum computers, enabling quantum networks, and understanding quantum sensors. Like quantum state tomography, the process tomography of an arbitrary quantum channel requires a number of ...
Jonathan Kunjummen +3 more
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Dividing Quantum Channels [PDF]
Communications in Mathematical Physics, 2008 welcome (23 pages); references and comments ...
Michael M. Wolf, J. I. Cirac
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Partially Coherent Direct Sum Channels [PDF]
Quantum, 2021 We introduce $\textit{Partially Coherent Direct Sum}$ (PCDS) quantum channels, as a generalization of the already known $\textit{Direct Sum}$ quantum channels.
Stefano Chessa, Vittorio Giovannetti
doaj +1 more source
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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Quantum Channels with Quantum Group Symmetry [PDF]
Communications in Mathematical Physics, 2022 In this paper we will demonstrate that any compact quantum group can be used as symmetry groups for quantum channels, which leads us to the concept of covariant channels. We, then, unearth the structure of the convex set of covariant channels by identifying all extreme points under the assumption of multiplicity-free condition for the associated fusion
Hun Hee Lee, Sang-Gyun Youn
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Optimal teleportation via noisy quantum channels without additional qubit resources
npj Quantum Information, 2021 Quantum teleportation exemplifies how the transmission of quantum information starkly differs from that of classical information and serves as a key protocol for quantum communication and quantum computing.
Dong-Gil Im +6 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 Broadcast Channels [PDF]
IEEE Transactions on Information Theory, 2011 15 pages; IEEE Trans. Inform. Theory, vol. 57, no.
Yard, Jon +2 more
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Generating random quantum channels [PDF]
Journal of Mathematics and Physics, 2020 Several techniques of generating random quantum channels, which act on the set of $d$-dimensional quantum states, are investigated. We present three approaches to the problem of sampling of quantum channels and show under which conditions they become ...
Ryszard Kukulski +4 more
semanticscholar +1 more source
Quantifying the magic of quantum channels [PDF]
New Journal of Physics, 2019 To achieve universal quantum computation via general fault-tolerant schemes, stabilizer operations must be supplemented with other non-stabilizer quantum resources.
Xin Wang, M. Wilde, Yuan Su
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