We investigate the error tolerance of quantum cryptographic protocols using d-level systems. In particular, we focus on prepare-and-measure schemes that use two mutually unbiased bases and aâ€¦ (More)

We show that, for a finite-dimensional Hilbert space, there exist observables that induce a tensor product structure such that the entanglement properties of any pure state can be tailored. Inâ€¦ (More)

Wolfgang P. Schleich1 Â· Kedar S. Ranade1 Â· Christian Anton2 Â· Markus Arndt3 Â· Markus Aspelmeyer4 Â· Manfred Bayer5 Â· Gunnar Berg6 Â· Tommaso Calarco7 Â· Harald Fuchs8 Â· Elisabeth Giacobino9 Â· Markusâ€¦ (More)

Positive maps which are not completely positive are used in quantum information theory as witnesses for convex sets of states, in particular as entanglement witnesses and, more generally, asâ€¦ (More)

We present a construction method for complete sets of cyclic mutually unbiased bases (MUBs) in Hilbert spaces of even prime-power dimensions. In comparison to the usual complete sets of MUBs,â€¦ (More)

The concept of asymptotic correctability of Bell-diagonal quantum states is generalised to elementary quantum systems of higher dimensions. Based on these results basic properties of quantum stateâ€¦ (More)

Related Articles Uncertainty inequalities among frequency moments and radial expectation values: Applications to atomic systems J. Math. Phys. 53, 043512 (2012) Quantum spin holography with surfaceâ€¦ (More)

The general conditions are discussed which quantum state purification protocols have to fulfill in order to be capable of purifying Bell-diagonal qubit-pair states, provided they consist of stepsâ€¦ (More)

We examine the phenomenon of entanglement sudden death (ESD) for (2 Ã— 3)dimensional systems. As for 2Ã— 2 systems, the negativity vanishes in finite time for some entangled pure as well as mixedâ€¦ (More)