Beyond the standard quantum limit for parametric amplification of broadband signals
Abstract The low-noise amplification of weak microwave signals is crucial for countless protocols in quantum information processing. Quantum mechanics sets an ultimate lower limit of half a photon to the added input noise for phase-preserving amplification of narrowband signals, also known as the st...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2021-11-01
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| Series: | npj Quantum Information |
| Online Access: | https://doi.org/10.1038/s41534-021-00495-y |