Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Revealing the emergence of classicality in nitrogen-vacancy centers

Published

Author(s)

Thomas Unden, Daniel Louzon, Michael P. Zwolak, Wojciech Zurek, Fedor Jelezko

Abstract

The origin of classical behavior of quantum systems is a long-standing mystery. Here, we examine a nitrogen vacancy center evolving naturally in the presence of its environment to study the proliferation of information about preferred quantum states via the environment. This redundantly imprinted information accounts for objective behavior, as it is independently accessible by many without perturbing the system of interest. To observe the emergence of redundant information, we implement a novel dynamical decoupling scheme that enables the measurement/control of several nuclear spins (the environment E) interacting with a nitrogen vacancy (the system S). In addition to showing how to create entangled SE states relevant to quantum metrology, we demonstrate that under the decoherence of S, redundant information is imprinted onto E, giving rise to classical objectivity -- a consensus of the nuclear spins about the state of S. This provides the first laboratory verification of the objective classical behavior emerging from the underlying quantum substrate.
Citation
Physical Review Letters
Volume
123
Issue
14

Keywords

NV centers, decoherence, entanglement, dynamical decoupling
Created October 1, 2019, Updated October 8, 2019