274 citations · 932 across the 21 of their papers we have counts for
3 papers · 2 filters
Counting single-qubit Clifford equivalent graph states is #P-Complete
Axel Dahlberg, Jonas Helsen, Stephanie Wehner
Graph states, which include for example Bell states, GHZ states and cluster states, form a well-known class of quantum states with applications ranging from quantum networks to err…
Transforming graph states to Bell-pairs is NP-Complete
Axel Dahlberg, Jonas Helsen, Stephanie Wehner
Critical to the construction of large scale quantum networks, i.e. a quantum internet, is the development of fast algorithms for managing entanglement present in the network. One f…
Spectral Quantum Tomography
Jonas Helsen, Francesco Battistel, Barbara M. Terhal
We introduce spectral quantum tomography, a simple method to extract the eigenvalues of a noisy few-qubit gate, represented by a trace-preserving superoperator, in a SPAM-resistant…