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23 papers · 2 filters
A heat bath can generate all classes of three-qubit entanglement
Christopher Eltschka, Daniel Braun, Jens Siewert
It is common knowledge that coupling to a heat bath, in general, tends to reduce the entanglement in a quantum system. In recent years, increasing interest has been devoted to the…
Biomimetic Cloning of Quantum Observables
U. Alvarez-Rodriguez, M. Sanz, L. Lamata +1
We propose a bio-inspired sequential quantum protocol for the cloning and preservation of the statistics associated to quantum observables of a given system. It combines the clonin…
Efficient quantum simulation of fermionic and bosonic models in trapped ions
L. Lamata, A. Mezzacapo, J. Casanova +1
We analyze the efficiency of quantum simulations of fermionic and bosonic models in trapped ions. In particular, we study the optimal time of entangling gates and the required numb…
Digital Quantum Simulation of Spin Systems in Superconducting Circuits
U. Las Heras, A. Mezzacapo, L. Lamata +3
We propose the implementation of a digital quantum simulator for prototypical spin models in a circuit quantum electrodynamics architecture. We consider the feasibility of the quan…
Practical method to obtain a lower bound to the three-tangle
Christopher Eltschka, Jens Siewert
The quantitative assessment of the entanglement in multipartite quantum states is, apart from its fundamental importance, a practical problem. Recently there has been significant p…
Spin squeezing and entanglement for arbitrary spin
Giuseppe Vitagliano, Iagoba Apellaniz, Inigo L. Egusquiza +1
A complete set of generalized spin-squeezing inequalities is derived for an ensemble of particles with an arbitrary spin. Our conditions are formulated with the first and second mo…