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12 papers · 2 filters
Robustness of quantum memories based on Majorana zero modes
Leonardo Mazza, Matteo Rizzi, Mikhail D. Lukin +1
We analyze the rate at which quantum information encoded in zero-energy Majorana modes is lost in the presence of perturbations. We show that information can survive for times that…
Thermodynamics of discrete quantum processes
Janet Anders, Vittorio Giovannetti
We define thermodynamic configurations and identify two primitives of discrete quantum processes between configurations for which heat and work can be defined in a natural way. Thi…
Electromagnetic channel capacity for practical purposes
Vittorio Giovannetti, Seth Lloyd, Lorenzo Maccone +1
We give analytic upper bounds to the channel capacity C for transmission of classical information in electromagnetic channels (bosonic channels with thermal noise). In the practica…
Ergodic and Mixing Quantum Channels in Finite Dimensions
Daniel Burgarth, Giulio Chiribella, Vittorio Giovannetti +2
The paper provides a systematic characterization of quantum ergodic and mixing channels in finite dimensions and a discussion of their structural properties. In particular, we disc…
Positive Wigner functions render classical simulation of quantum computation efficient
A. Mari, J. Eisert
We show that quantum circuits where the initial state and all the following quantum operations can be represented by positive Wigner functions can be classically efficiently simula…
Wick's theorem for matrix product states
R. Hübener, A. Mari, J. Eisert
Matrix-product states and their continuous analogues are variational classes of states that capture quantum many-body systems or quantum fields with low entanglement; they are at t…