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5 papers · 2 filters
Quantum processing with ensembles of rare earth ions in a stoichiometric crystal
R. L. Ahlefeldt, M. J. Pearce, M. R. Hush +1
We describe a method for creating small quantum processors in a crystal stoichiometric in an optically active rare earth ion. The crystal is doped with another rare earth, creating…
Feasibility study of a coherent feedback squeezer
Shota Yokoyama, Daniel Peace, Warit Asavanant +6
We investigate a coherent feedback squeezer that uses quantum coherent feedback (measurement-free) control. Our squeezer is simple, easy to implement, robust to the gain fluctuatio…
Global Entanglement Distribution with Multi-mode Non-Gaussian Operations
Mingjian He, Robert Malaney, Jonathan Green
Non-Gaussian operations have been studied intensively in recent years due to their ability to enhance the entanglement of quantum states. However, most previous studies on such ope…
High-Fidelity Entangling Gates for Quantum-Dot Hybrid Qubits Based on Exchange Interactions
Yuan-Chi Yang, S. N. Coppersmith, Mark Friesen
Quantum dot hybrid qubits exploit an extended charge-noise sweet spot that suppresses dephasing and has enabled the experimental achievement of high-fidelity single-qubit gates. Ho…
Calibration of cryogenic amplification chains using normal-metal--insulator--superconductor junctions
Eric Hyyppä, Máté Jenei, Shumpei Masuda +7
Various applications of quantum devices call for an accurate calibration of cryogenic amplification chains. To this end, we present a convenient calibration scheme and use it to ac…