Digital-Analog Quantum Computation

Understand

Digital quantum computing paradigm offers highly-desirable features such as universality, scalability, and quantum error correction.

• However, physical resource requirements to implement useful error-corrected quantum algorithms are prohibitive in the current era of NISQ devices.
• As an alternative path to performing universal quantum computation, within the NISQ era limitations, we propose to merge digital single-qubit operations with analog multi-qubit entangling blocks in an approach we call digital-analog quantum computing (DAQC).
• Along these lines, although the techniques may be extended to any resource, we propose to use unitaries generated by the ubiquitous Ising Hamiltonian for the analog entangling block and we prove its universal character.