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6 papers · 2 filters
Systematic Dimensionality Reduction for Quantum Walks: Optimal Spatial Search and Transport on Non-Regular Graphs
Leonardo Novo, Shantanav Chakraborty, Masoud Mohseni +2
Continuous time quantum walks provide an important framework for designing new algorithms and modelling quantum transport and state transfer problems. Often, the graph representing…
Violations of the second law of thermodynamics by a non completely positive dynamics
G. Argentieri, F. Benatti, R. Floreanini +1
We consider a recently proposed model of driven open quantum microcircuit [F. Pellegrini et al., Phys. Rev. Lett. 107, 060401 (2011)] amenable to experimental investigations. We sh…
Oblivious transfer based on single-qubit rotations
J. Rodrigues, P. Mateus, N. Paunković +1
We present a bit-string quantum oblivious transfer protocol based on single-qubit rotations. Our protocol is built upon a previously proposed quantum public-key protocol and its pr…
Noise and measurement errors in a practical two-state quantum bit commitment protocol
Ricardo Loura, Álvaro J. Almeida, Paulo S. André +3
We present a two-state practical quantum bit commitment protocol, the security of which is based on the current technological limitations, namely the nonexistence of either stable…
Pretty good state transfer of entangled states through quantum spin chains
Rúben Sousa, Yasser Omar
The XX model with uniform couplings represents the most natural choice for quantum state transfer through spin chains. Given that it has long been established that single-qubit sta…
Oblivious transfer based on quantum state computational distinguishability
A. Souto, P. Mateus, P. Adão +1
Oblivious transfer protocol is a basic building block in cryptography and is used to transfer information from a sender to a receiver in such a way that, at the end of the protocol…