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8 papers · 2 filters
Daylight operation of a free space, entanglement-based quantum key distribution system
Matthew P. Peloso, Ilja Gerhardt, Caleb Ho +2
Many quantum key distribution (QKD) implementations using a free space transmission path are restricted to operation at night time in order to distinguish the signal photons used f…
Positive phase space transformation incompatible with classical physics
Wonmin Son, Johannes Kofler, M. S. Kim +2
Bell conjectured that a positive Wigner function does not allow violation of the inequalities imposed by local hidden variable theories. A requirement for this conjecture is "when…
Heisenberg chains cannot mirror a state
Marcin Wiesniak
Faithful exchange of quantum information can in future become a key part of many computational algorithms. Some Authors suggest to use chains of mutually coupled spins as channels…
Enhancing the Detection of Natural Thermal Entanglement with Disorder
Jenny Hide, Wonmin Son, Vlatko Vedral
Physical systems have some degree of disorder present in them. We discuss how to treat natural, thermal entanglement in any random macroscopic system from which a thermodynamic wit…
Quantum instability and edge entanglement in a quasi-long-range order
Wonmin Son, Luigi Amico, Francesco Plastina +1
We investigate the build-up of quasi-long-range order in the XX chain with transverse magnetic field at finite size. As the field is varied, the ground state of the system displays…
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…