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17 papers · 2 filters
Cumulants and the moment algebra: tools for analysing weak measurements
Johan Aberg, Graeme Mitchison
Recently it has been shown that cumulants significantly simplify the analysis of multipartite weak measurements. Here we consider the mathematical structure that underlies this, an…
Generalized relative entropies and the capacity of classical-quantum channels
Milan Mosonyi, Nilanjana Datta
We provide lower and upper bounds on the information transmission capacity of one single use of a classical-quantum channel. The lower bound is expressed in terms of the Hoeffding…
Interfacing with Hamiltonian Dynamics
Alastair Kay
Simple constructions and protocols are demonstrated to allow the implementation of universal quantum computation on an arbitrarily large quantum system by controlling a fixed numbe…
Max- Relative Entropy of Entanglement, alias Log Robustness
Nilanjana Datta
Properties of the max- relative entropy of entanglement are investigated, and its significance as an upper bound to the one shot rate for perfect entanglement dilution, under a par…
The Non-Equilibrium Reliability of Quantum Memories
Alastair Kay
The ability to store quantum information without recourse to constant feedback processes would yield a significant advantage for future implementations of quantum information proce…
Implementation of Quantum Gates via Optimal Control
Sonia Schirmer
Starting with the basic control system model often employed in NMR pulse design, we derive more realistic control system models taking into account effects such as off-resonant exc…