Process Tomography for Systems in a Thermal State

Abstract

We propose a new method for implementing process tomography that is based on the information extracted from temporal correlations between observables, rather than on state preparation and state tomography. As such, the approach is applicable to systems that are in a mixed state, and in particular to thermal states. We illustrate the method for an arbitrary evolution described by Kraus operators, as well as for simpler cases such as a general Gaussian channels, and qubit dynamics.

References in corpus (10)

• Complete Characterization of a Quantum Process: the Two-Bit Quantum Gate
• Scalable Noise Estimation with Random Unitary Operators
• AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
• Experimental violation of a Bell's inequality in time with weak measurement
• Symmetrised Characterisation of Noisy Quantum Processes
• Quantum channels and their entropic characteristics
• From Completely Positive Maps to the Quantum Markovian Semigroup Master Equation
• Sequential weak measurement
• Gaussian quantum channels
• Spectral properties of a resonator driven by a superconducting single-electron transistor

Cited by in corpus (5)

• Measuring incompatible observables of a single photon
• Determination of weak values of quantum operators using only strong measurements
• Experimental Realization of Sequential Weak Measurements of Arbitrary Non-commuting Pauli Observables
• Probing finite coarse-grained virtual Feynman histories with sequential weak values
• Memory effects in a sequence of measurements of non-commuting observables