Related Experiment Video
Updated: Apr 24, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
Published on: April 4, 2017
Quantum Hamiltonian identification from measurement time traces
1Joint Institute of UM-SJTU and Key Laboratory of System Control and Information Processing (MOE), Shanghai Jiao Tong University, Shanghai 200240, China.
Abstract:
Precise identification of parameters governing quantum processes is a critical task for quantum information and communication technologies. In this Letter, we consider a setting where system evolution is determined by a parametrized Hamiltonian, and the task is to estimate these parameters from temporal records of a restricted set of system observables (time traces). Based on the notion of system realization from linear systems theory, we develop a constructive algorithm that provides estimates of the unknown parameters directly from these time traces. We illustrate the algorithm and its robustness to measurement noise by applying it to a one-dimensional spin chain model with variable couplings.
Related Concept Videos
¹H NMR: Interpreting Distorted and Overlapping Signals
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
The de Broglie Wavelength
The Quantum-Mechanical Model of an Atom
¹H NMR of Labile Protons: Temporal Resolution
The –OH proton in alcohols typically appears in the range of δ 2 to 5 ppm but can vary depending on the...
The Uncertainty Principle

