539 citations · 1.2k across the 7 of their papers we have counts for
7 papers
Implications of Superstrong Nonlocality for Cryptography
Harry Buhrman, Matthias Christandl, Falk Unger +2
Non-local boxes are hypothetical ``machines'' that give rise to superstrong non-local correlations, leading to a stronger violation of Bell/CHSH inequalities than is possible withi…
Uncertainty, Monogamy, and Locking of Quantum Correlations
Matthias Christandl, Andreas Winter
Squashed entanglement and entanglement of purification are quantum mechanical correlation measures and defined as certain minimisations of entropic quantities. We present the first…
Perfect Transfer of Arbitrary States in Quantum Spin Networks
Matthias Christandl, Nilanjana Datta, Tony C. Dorlas +3
We propose a class of qubit networks that admit perfect state transfer of any two-dimensional quantum state in a fixed period of time. We further show that such networks can distri…
Quantum Anonymous Transmissions
Matthias Christandl, Stephanie Wehner
We consider the problem of hiding sender and receiver of classical and quantum bits (qubits), even if all physical transmissions can be monitored. We present a quantum protocol for…
The Spectra of Density Operators and the Kronecker Coefficients of the Symmetric Group
Matthias Christandl, Graeme Mitchison
Determining the relationship between composite systems and their subsystems is a fundamental problem in quantum physics. In this paper we consider the spectra of a bipartite quantu…
Mirror Inversion of Quantum States in Linear Registers
Claudio Albanese, Matthias Christandl, Nilanjana Datta +1
Transfer of data in linear quantum registers can be significantly simplified with pre-engineered but not dynamically controlled inter-qubit couplings. We show how to implement a mi…