Demolition measurement protocol for transmon qubits

• URL: http://arxiv.org/abs/2502.18322v2
• Date: Mon, 31 Mar 2025 09:46:50 GMT
• Title: Demolition measurement protocol for transmon qubits
• Authors: Ashutosh Mishra, Frank K. Wilhelm, Shai Machnes,
• Abstract summary: We propose a protocol for a textitdemolition measurement of a transmon qubit that integrates qubit readout with the reset process to minimize qubit idle time.<n>We demonstrate that this protocol could be implemented in $1, mu$s with greater than $95, %$ reset fidelity and a $99, %$ readout fidelity without any hardware overhead beyond those commonly used.
• Score: 0.7646713951724011
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The process of measuring a qubit and re-initializing it to the ground state practically lead to long qubit idle times between re-runs of experiments on a superconducting quantum computer. Here, we propose a protocol for a \textit{demolition measurement} of a transmon qubit that integrates qubit readout with the reset process to minimize qubit idle time. We present a three-staged implementation of this protocol, involving a combined qubit readout and resonator reset scheme that unconditionally resets the resonator at the end of the readout; a leakage removal scheme that can be integrated with the measurement stage; and an unconditional qubit reset. We demonstrate that this protocol could be implemented in $1 \, \mu$s with greater than $95 \, \%$ reset fidelity and a $99 \, \%$ readout fidelity without any hardware overhead beyond those commonly used. This provides at least a 50x speed up compared to the passive decay of the qubit, thereby significantly increasing the data-acquisition rate.

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