University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Suppression of the radiative decay of atomic coherence in squeezed vacuum

Murch, KW, Weber, SJ, Beck, KM, Ginossar, E and Siddiqi, I (2013) Suppression of the radiative decay of atomic coherence in squeezed vacuum Quantum Physics.

[img] PDF (deleted)
1301.6276v1.pdf
Restricted to Repository staff only
Available under License : See the attached licence file.

Download (3MB)
[img]
Preview
PDF (licence)
SRI_deposit_agreement.pdf

Download (33kB)
[img]
Preview
PDF
1301.6276v1.pdf
Available under License : See the attached licence file.

Download (3MB)

Abstract

Quantum fluctuations of the electromagnetic vacuum are responsible for physical effects such as the Casimir force and the radiative decay of atoms, and set fundamental limits on the sensitivity of measurements. Entanglement between photons can produce correlations that result in a reduction of these fluctuations below the vacuum level allowing measurements that surpass the standard quantum limit in sensitivity. Here we demonstrate that the radiative decay rate of an atom that is coupled to quadrature squeezed electromagnetic vacuum can be reduced below its natural linewidth. We observe a two-fold reduction of the transverse radiative decay rate of a superconducting artificial atom coupled to continuum squeezed vacuum generated by a Josephson parametric amplifier, allowing the transverse coherence time T_2 to exceed the vacuum decay limit of 2T_1. We demonstrate that the measured radiative decay dynamics can be used to tomographically reconstruct the Wigner distribution of the the itinerant squeezed state. Our results are the first confirmation of a canonical prediction of quantum optics and open the door to new studies of the quantum light-matter interaction.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
AuthorsEmailORCID
Murch, KWUNSPECIFIEDUNSPECIFIED
Weber, SJUNSPECIFIEDUNSPECIFIED
Beck, KMUNSPECIFIEDUNSPECIFIED
Ginossar, EUNSPECIFIEDUNSPECIFIED
Siddiqi, IUNSPECIFIEDUNSPECIFIED
Date : 26 January 2013
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 11 Feb 2013 14:55
Last Modified : 23 Sep 2013 20:00
URI: http://epubs.surrey.ac.uk/id/eprint/749750

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800