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A benchmarking procedure for quantum networks
Jonas Helsen, Stephanie Wehner
We propose network benchmarking: a procedure to efficiently benchmark the quality of a quantum network link connecting quantum processors in a quantum network. This procedure is ba…
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…
Benchmarking Gate Fidelities in a Si/SiGe Two-Qubit Device
X. Xue, T. F. Watson, J. Helsen +7
We report the first complete characterization of single-qubit and two-qubit gate fidelities in silicon-based spin qubits, including cross-talk and error correlations between the tw…
Efficient Unitarity Randomized Benchmarking of Few-qubit Clifford Gates
Bas Dirkse, Jonas Helsen, Stephanie Wehner
Unitarity randomized benchmarking (URB) is an experimental procedure for estimating the coherence of implemented quantum gates independently of state preparation and measurement er…