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9 papers · 2 filters
Multiplexed Readout of Transmon Qubits with Josephson Bifurcation Amplifiers
V. Schmitt, X. Zhou, K. Juliusson +4
Achieving individual qubit readout is a major challenge in the development of scalable superconducting quantum processors. We have implemented the multiplexed readout of a four tra…
Antibunching and unconventional photon blockade with Gaussian squeezed states
Marc-Antoine Lemonde, Nicolas Didier, Aashish A. Clerk
Photon antibunching is a quantum phenomenon typically observed in strongly nonlinear systems where photon blockade suppresses the probability for detecting two photons at the same…
Wigner function negativity and contextuality in quantum computation on rebits
Nicolas Delfosse, Philippe Allard Guerin, Jacob Bian +1
We describe a universal scheme of quantum computation by state injection on rebits (states with real density matrices). For this scheme, we establish contextuality and Wigner funct…
Photon-mediated interactions between distant artificial atoms
Arjan F. van Loo, Arkady Fedorov, Kevin Lalumière +3
Photon-mediated interactions between atoms are of fundamental importance in quantum optics, quantum simulations and quantum information processing. The exchange of real and virtual…
The Trotter Step Size Required for Accurate Quantum Simulation of Quantum Chemistry
David Poulin, M. B. Hastings, Dave Wecker +3
The simulation of molecules is a widely anticipated application of quantum computers. However, recent studies \cite{WBCH13a,HWBT14a} have cast a shadow on this hope by revealing th…
A note on the minimum distance of quantum LDPC codes
Nicolas Delfosse, Zhentao Li, Stéphan Thomassé
We provide a new lower bound on the minimum distance of a family of quantum LDPC codes based on Cayley graphs proposed by MacKay, Mitchison and Shokrollahi. Our bound is exponentia…