English

Selective continuous-variable quantum process tomography

Quantum Physics 2025-04-22 v2

Abstract

Quantum process tomography is a useful tool for characterizing quantum processes. This task is essential for the development of different areas, such as quantum information processing. In this work, we present a protocol for selective continuous-variable quantum process tomography. Our proposal allows one to selectively estimate any element of an unknown continuous-variable quantum process in the position representation, without requiring the complete reconstruction of the process. By resorting to controlled squeezing and translation operations, and adaptatively discretizing the process, a direct measure of an estimate of any process element can be obtained. Furthermore, we show, supported by numerical simulations, how the protocol can be used to partially reconstruct on a region a continuous-variable quantum process.

Keywords

Cite

@article{arxiv.2410.17516,
  title  = {Selective continuous-variable quantum process tomography},
  author = {Virginia Feldman and Ariel Bendersky},
  journal= {arXiv preprint arXiv:2410.17516},
  year   = {2025}
}