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Improving Quantum Gate Fidelities by Using a Qubit to Measure Microwave Pulse Distortions
- Source :
- Physical Review Letters, 110(4):040502. AMER PHYSICAL SOC
- Publication Year :
- 2013
-
Abstract
- We present a new method for determining pulse imperfections and improving the single-gate fidelity in a superconducting qubit. By applying consecutive positive and negative pi pulses, we amplify the qubit evolution due to microwave pulse distortions, which causes the qubit state to rotate around an axis perpendicular to the intended rotation axis. Measuring these rotations as a function of pulse period allows us to reconstruct the shape of the microwave pulse arriving at the sample. Using the extracted response to predistort the input signal, we are able to reduce the average error per gate by 37%, which enables us to reach an average single-qubit gate fidelity higher than 0.998. DOI: 10.1103/PhysRevLett.110.040502
- Subjects :
- Flux qubit
Charge qubit
FOS: Physical sciences
General Physics and Astronomy
02 engineering and technology
01 natural sciences
Phase qubit
Quantum gate
Optics
Computer Science::Emerging Technologies
Quantum mechanics
TOMOGRAPHY
0103 physical sciences
SUPERCONDUCTING FLUX QUBIT
010306 general physics
Quantum computer
Physics
Quantum Physics
business.industry
PHASE QUBITS
021001 nanoscience & nanotechnology
Pulse (physics)
Qubit
Quantum Physics (quant-ph)
0210 nano-technology
business
Microwave
Subjects
Details
- Language :
- English
- ISSN :
- 00319007
- Volume :
- 110
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters
- Accession number :
- edsair.doi.dedup.....0b059aa6a86d72fc585d5f8054ac6fd8