Power of one bit of quantum information in quantum metrology

• Main Authors: Cable, Hugo, Gu, Mile, Modi, Kavan
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2018
• Subjects: Quantum Metrology; DRNTU::Science::Physics; Quantum Information
• Online Access: https://hdl.handle.net/10356/87796; http://hdl.handle.net/10220/46857
• Institution: Nanyang Technological University

We present a model of quantum metrology inspired by the computational model known as deterministic quantum computation with one quantum bit (DQC1). Using only one pure qubit together with l fully mixed qubits we obtain measurement precision (defined as root-mean-square error for the parameter being...