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7 papers · 2 filters
Entanglement renormalization and boundary critical phenomena
P. Silvi, V. Giovannetti, P. Calabrese +2
The multiscale entanglement renormalization ansatz is applied to the study of boundary critical phenomena. We compute averages of local operators as a function of the distance from…
Critical properties of homogeneous binary trees
P. Silvi, V. Giovannetti, S. Montangero +3
Many-body states whose wave-function admits a representation in terms of a uniform binary-tree tensor decomposition are shown to obey to power-law two-body correlations functions.…
Efficient Generation of a Maximally Entangled State by Repeated On- and Off-Resonant Scattering of Ancilla Qubits
Kazuya Yuasa, Daniel Burgarth, Vittorio Giovannetti +1
A scheme for preparing two fixed non-interacting qubits in a maximally entangled state is presented. By repeating on- and off-resonant scattering of ancilla qubits, the state of th…
Teleportation-Induced Correlated Quantum Channels
Filippo Caruso, Vittorio Giovannetti, G. Massimo Palma
Quantum teleportation of a n-qubit state performed using as entangled resource a general bipartite state of 2n qubits instead of n Bell states is equivalent to a correlated Pauli c…
Capacities of lossy bosonic memory channels
Cosmo Lupo, Vittorio Giovannetti, Stefano Mancini
We introduce a general model for a lossy bosonic memory channel and calculate the classical and the quantum capacity, proving that coherent state encoding is optimal. The use of a…
Optimal Control at the Quantum Speed Limit
Tommaso Caneva, Michael Murphy, Tommaso Calarco +4
Optimal control theory is a promising candidate for a drastic improvement of the performance of quantum information tasks. We explore its ultimate limit in paradigmatic cases, and…