Radiofrequency cryogenic amplifier
First-stage cryogenic amplifier for radiofrequency (rf) signals in cryogenic environments and in presence of externally applied magnetic fields.
Applications: Quantum computing, communication
| Features | Benefits |
|---|---|
| A carbon-nanotube used as parametric amplifier; Amplification of radio-frequency signals can be achieved by utilising the phenomenon arising from the non-linear interactions in carbon nanotubes | Provides a first-stage amplifier for quantum technologies requiring magnetic fields for qubit operations; Parametric amplification enables low noise, large gain of bandwidth |
| A method where a parametric amplifier is used in a low temperature regime in which a quantum dot is formed in a carbon nanotube | Compatible with use in low temperature environments, such as in dilution fridges or other cryogenic devices |
| No magnetic field-sensitive materials in the system | Allows the amplifier to be used for applications that require magnetic fields, such as spin qubits |
| The carbon-nanotubes have low disorder, leading to very high-quality factors (up to 5 million) | Extremely low dissipation achieved for the carbon-nanotubes |
| The carbon-nanotube possesses nanoscale dimensions | Achieves a small footprint and the possibility to integrate the carbon-nanotube right next to the quantum devices |