Berkeley Lab
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Advanced Quantum Testbed
Computational Research Division
AQT at Berkeley Lab

2020 February

February 20, 2020
  • By : srmorgan
  • News, Quantum Computation & Simulation
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Simulations of two qubit gate dynamics have illustrated well known trade-offs

Simulations of two qubit gate dynamics have illustrated the well known trade-off between coherent and incoherent errors as a function of gate speed. Faster gates are less susceptible to the incoherent error caused by qubit relaxation, while slower gates have lower levels of coherent error due to unwanted interactions with the non-computational states of the

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February 16, 2020
  • By : srmorgan
  • News, Quantum Computation & Simulation
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Photodetector tested in continuous mode

First acquisition of long trajectories (~ms) to test detector performance when the photon’s arrival time is unknown. The blue trace is the filtered detector response when a weak continuous tone was sent into the detector. Same for the orange trace, except the tone was off so when the trajectory crosses the threshold we measure a

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February 4, 2020
  • By : srmorgan
  • News, Quantum Processor Development
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Junction fabrication process

Junction fabrication process is ported to a new oxygen plasma asher. This new tool significantly simplifies the process, improves critical current uniformity, and improves the uniformity of how the junctions age with time.

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