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Additivity for transpose depolarizing channels
Nilanjana Datta, Alexander S. Holevo, Yuri Suhov
Additivity of the minimal output entropy for the family of transpose depolarizing channels introduced by Fannes et al. [quant-ph/0410195] is considered. It is shown that using the…
Perfect Transfer of Arbitrary States in Quantum Spin Networks
Matthias Christandl, Nilanjana Datta, Tony C. Dorlas +3
We propose a class of qubit networks that admit perfect state transfer of any two-dimensional quantum state in a fixed period of time. We further show that such networks can distri…
Multipartite entanglement in quantum spin chains
D. Bruss, N. Datta, A. Ekert +2
We study the occurrence of multipartite entanglement in spin chains. We show that certain genuine multipartite entangled states, namely W states, can be obtained as ground states o…
Multiplicativity of Maximal p-Norms in Werner-Holevo channels for
Nilanjana Datta
Recently, King and Ruskai [1] conjectured that the maximal p-norm of the Werner--Holevo channel is multiplicative for all . In this paper we prove this conjecture. Ou…
Additivity in Isotropic Quantum Spin Channels
Nilanjana Datta
We prove additivity of the minimum output entropy and the Holevo capacity for rotationally invariant quantum channels acting on spin-1/2 and spin-1 systems. The physical significan…
Mirror Inversion of Quantum States in Linear Registers
Claudio Albanese, Matthias Christandl, Nilanjana Datta +1
Transfer of data in linear quantum registers can be significantly simplified with pre-engineered but not dynamically controlled inter-qubit couplings. We show how to implement a mi…