Tomograms for open quantum systems: in(finite) dimensional optical and spin systems

TL;DR

This paper investigates the evolution of quantum state tomograms in finite and infinite dimensional systems under realistic conditions, accounting for decoherence and dissipation in open quantum systems, with implications for quantum information processing.

Contribution

It provides a comprehensive analysis of tomogram dynamics in open quantum systems, bridging theoretical formalism with experimental relevance for quantum state reconstruction.

Findings

Decoherence affects the shape of quantum tomograms.

Dissipation influences the nonclassical features observed.

The formalism aids in accurate quantum state reconstruction under realistic conditions.

Abstract

Tomograms are obtained as probability distributions and are used to reconstruct a quantum state from experimentally measured values. We study the evolution of tomograms for different quantum systems, both finite and infinite dimensional. In realistic experimental conditions, the quantum states are exposed to the ambient environment and hence subject to effects like decoherence and dissipation, which are dealt with here, consistently, using the formalism of open quantum systems. This is extremely relevant from the perspective of experimental implementation and issues related to state reconstruction in quantum computation and communication. These considerations are also expected to affect the quasiprobability distribution obtained from experimentally generated tomograms and nonclassicality observed from them.