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Cryogenic Variable-Temperature Noise Source

Measurement Infrastructure

The Cryogenic Variable-Temperature Noise Source is a diagnostic tool that adds a controlled amount of noise to an input line, making it possible to calibrate the intrinsic noise of a device under test.

Highlights
Technical Specifications
Technical Requirements
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The Cryogenic Variable-Temperature Noise Source is used to calibrate the intrinsic noise of a device under test, such as a microwave amplifier.

When installed on the Cold Plate, the noise source can be operated at temperatures between 0.1 K < T < 5 K without causing significant heating in the experimental space. Importantly, this dynamic range enables the user to calibrate the noise added by both quantum-limited parametric microwave amplifiers and HEMT amplifiers.

Product Highlights

1.0

Cryogenic Variable-Temperature Noise Source

Measurement Infrastructure

Better Optimization of Readout Lines

The Cryogenic Variable-Temperature Noise Source improves the speed and accuracy of validating the qubit readout lines.

Calibration Tool in the Cryogenic Environment

The tool is located inside the cryogenic environment and adds controlled amounts of noise to the signal paths to calibrate the intrinsic noise added by the amplifiers, cables, and all other components.

Limited Heating of Experimental Space

The tool does not cause significant back action heating in the experimental space.

Qubit Noise Experiments

The tool can be used to directly examine how qubits behave when disturbed by noise.

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Technical Specifications

2.0

Cryogenic Variable-Temperature Noise Source

Measurement Infrastructure

Transmission and reflection measurement results of the noise emitting element (20 dB copper-cased bulkhead attenuator) are shown in the figure.

Technical Requirements

3.0

Cryogenic Variable-Temperature Noise Source

Measurement Infrastructure

A free KF25 or KF40 port on the Cold Plate is required for installation. In a typical application, the CVTNS is mounted to the Cold Plate stage on an available KF25 LOS (line-of-sight) port. If an adapter plate is used, it can also be installed on a KF40 port.

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