Abstract: An apparatus is provided for processing a digital signal for a digital-to-analog converter (“DAC”). The apparatus includes a monitoring component configured to monitor a sequence of samples of the digital signal for a predetermined pattern of signal values. Upon determining that the sequence of samples does include the predetermined pattern of signal values, then samples in the sequence of samples that include the predetermined pattern of signal values are sent to the DAC. Noise is injected into an interpolation component, and the noise is withheld from an output of the DAC.

Abstract: Techniques are provided for training kernels for use in frequency-multiplexed readout of quantum bits. For example, a method comprises performing multiple iterations of a process which comprises setting states of a group of quantum bits using a random process, and performing a readout process to acquire a frequency-multiplexed readout signal which represents readout states of the group of quantum bits. The frequency-multiplexed readout signals that are acquired for at least a portion of the iterations are analyzed to build at least one kernel for each quantum bit of the group of quantum bits, wherein the at least one kernel for a given quantum bit is configured for use in discriminating a state of the given quantum bit in a frequency-multiplexed readout operation applied to the group of quantum bits.

Abstract: Systems and techniques that facilitate qubit differentiation with a numerically controlled oscillator (NCO) kernel are provided. One or more embodiments described herein can comprise a system, which can comprise a memory that can store computer executable components. The system can also comprise a processor, operably coupled to the memory that can execute the computer executable components stored in memory. The computer executable components can comprise an input component that receives a setpoint having a phase or a frequency for a quantum signal as input. The computer executable components can further comprise an execution component that generates a kernel based on the setpoint for the quantum signal using a logic block in an integrated circuit, wherein the logic block comprises an NCO that generates the kernel using a reading of a waveform lookup table.

Abstract: An apparatus is provided for processing a digital signal for a digital-to-analog converter (“DAC”). The apparatus includes a monitoring component configured to monitor a sequence of samples of the digital signal for a predetermined pattern of signal values. Upon determining that the sequence of samples does include the predetermined pattern of signal values, then samples in the sequence of samples that include the predetermined pattern of signal values are sent to the DAC. Noise is injected into an interpolation component, and the noise is withheld from an output of the DAC.