Anticipative measurements in hybrid quantum-classical computation
arXiv:2209.05338 · doi:10.1103/PhysRevA.107.032612
Abstract
Before the availability of large scale fault-tolerant quantum devices, one has to find ways to make the most of current noisy intermediate-scale quantum devices. One possibility is to seek smaller repetitive hybrid quantum-classical tasks with higher fidelity, rather than directly pursuing large complex tasks. We present an approach in this direction where the quantum computation is supplemented by a classical result. While the presence of the supplementary classical information helps alone, taking advantage of its anticipation also leads to a new type of quantum measurements, which we call anticipative. Anticipative quantum measurements lead to improved success rate over cases where we would use quantum measurements optimized without assuming the later arriving supplementing information. Importantly, in an anticipative quantum measurement the combination of the results from classical and quantum computations happens only in the end, without the need for feedback from the one to the other computation, a feature which hence allows for running both computations in parallel. We demonstrate the method with an experiment using an IBMQ device and show that it leads to an improved success rate even in a real noisy setting.
References in corpus (20)
- Quantum Computing in the NISQ era and beyond
- Noisy intermediate-scale quantum (NISQ) algorithms
- Trading classical and quantum computational resources
- Mitigation of readout noise in near-term quantum devices by classical post-processing based on detector tomography
- Simulating positive-operator-valued measures with projective measurements
- Doubling the size of quantum simulators by entanglement forging
- Hybrid quantum-classical algorithms in the noisy intermediate-scale quantum era and beyond
- Experimental Deep Reinforcement Learning for Error-Robust Gateset Design on a Superconducting Quantum Computer
- Protected quantum computing: Interleaving gate operations with dynamical decoupling sequences
- Quantum Incompatibility Witnesses
- Structure of minimum-error quantum state discrimination
- Operational framework for quantum measurement simulability
- Rigorous measurement error correction
- Quantum measurements on finite dimensional systems: relabeling and mixing
- A hybrid quantum-classical approach to mitigating measurement errors
- Computational speedups using small quantum devices
- State discrimination with post-measurement information and incompatibility of quantum measurements
- Witnessing incompatibility of quantum channels
- Dynamically corrected gates suppress spatio-temporal error correlations as measured by randomized benchmarking
- Quantum guessing games with posterior information