|Objectives:||Initialize, manipulate, and read out the quantum state of a superconducting circuit.|
|Benefits:||Integrating the signal generation and detection improves synchronization and simplifies setup.|
|Relevant products:||UHFLI Lock-in Amplifier, UHF-AWG Arbitrary Waveform Generator, UHF-DIG Digitizer, UHF-MF Multi-frequency option|
Circuit quantum electrodynamics (cQED) aims at speeding up numerical computation by using on-chip superconducting resonant circuits (so-called quantum bits, qubits). For cQED experiments the UHF hardware offers arbitrary signal generation with advanced modulation features for quadrature (I/Q) pulse generation as well as digital homodyne detection at an unprecedented speed.
The two phases of a typical cQED experiment are performed with the following tools:
All tools are fully integrated into the LabOne user interface and support easy integration into LabVIEW, Python, and Matlab. Internal cross-domain triggering simplifies the synchronization of preparation and measurement phase, and open the possibility to perform ultra-fast feed-forward protocols for deterministic qubit reset and quantum error correction.
Circuit QED Setup
The qubit chip is mounted inside a cryostat. Signals sent to and from the qubit are in the microwave domain (5-10 GHz). The UHFLI generates and analyzes the signals in the baseband 0-600 MHz. Up- and downconversion is achieved with analog mixers.
Key features of the UHFLI Lock-in Amplifier for this application