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8 papers · 2 filters
Entanglement and its Role in Shor's Algorithm
Vivien M Kendon, William J Munro
Entanglement has been termed a critical resource for quantum information processing and is thought to be the reason that certain quantum algorithms, such as Shor's factoring algori…
Crucial Role of Quantum Entanglement in Bulk Properties of Solids
Caslav Brukner, Vlatko Vedral, Anton Zeilinger
We demonstrate that the magnetic susceptibility of strongly alternating antiferromagnetic spin-1/2 chains is an entanglement witness. Specifically, magnetic susceptibility of coppe…
Equation of state for Entanglement in a Fermi gas
Christian Lunkes, Caslav Brukner, Vlatko Vedral
Entanglement distance is the maximal separation between two entangled electrons in a degenerate electron gas. Beyond that distance, all entanglement disappears. We relate entanglem…
Thermodynamical Cost of Accessing Quantum Information
K. Maruyama, C. Brukner, V. Vedral
Thermodynamics is a macroscopic physical theory whose two very general laws are independent of any underlying dynamical laws and structures. Nevertheless, its generality enables us…
Complementarity and quantum walks
Viv Kendon, Barry C. Sanders
We show that quantum walks interpolate between a coherent `wave walk' and a random walk depending on how strongly the walker's coin state is measured; i.e., the quantum walk exhibi…
Proper and Improper Separability
Christopher G Timpson, Harvey R Brown
The distinction between proper and improper mixtures is a staple of the discussion of foundational questions in quantum mechanics. Here we note an analogous distinction in the cont…