High Resolution non-Markovianity in NMR

TL;DR

This paper demonstrates how engineered environmental correlations in NMR can induce and control non-Markovian effects in a qubit's evolution, highlighting the role of measurement resolution in detecting these effects.

Contribution

It introduces a collisional model in NMR to precisely control and observe non-Markovian dynamics in a quantum system, revealing how measurement resolution influences detectability.

Findings

Engineered environmental correlations induce non-Markovian effects.

Measurement resolution can hide memory effects in quantum dynamics.

NMR effectively simulates open quantum system behaviors.

Abstract

Memoryless time evolutions are ubiquitous in nature but often correspond to a resolution-induced approximation, i.e. there are correlations in time whose effects are undetectable. Recent advances in the dynamical control of small quantum systems provide the ideal scenario to probe some of these effects. Here we experimentally demonstrate the precise induction of memory effects on the evolution of a quantum coin (qubit) by correlations engineered in its environment. In particular, we design a collisional model in Nuclear Magnetic Resonance (NMR) and precisely control the strength of the effects by changing the degree of correlation in the environment and its time of interaction with the qubit. We also show how these effects can be hidden by the limited resolution of the measurements performed on the qubit. The experiment reinforces NMR as a test bed for the study of open quantum systems and the simulation of their classical counterparts.