Volume 78, Number 2, April 2007
Article Number 20006
Number of page(s) 5
Section General
Published online 04 April 2007
EPL, 78 (2007) 20006
DOI: 10.1209/0295-5075/78/20006

Detection of gravitational waves -An application of relativistic quantum information theory

Ye Yeo, Zhi Han Lim, Chee Leong Ching, J. Chong, Wee Kang Chua and A. Dewanto

Department of Physics, National University of Singapore - 10 Kent Ridge Crescent, Singapore 119260, Singapore

received 21 November 2006; accepted in final form 7 March 2007; published April 2007
published online 4 April 2007

We show that a passing gravitational wave may influence the spin entropy and spin negativity of a system of N massive spin-(1/2) particles, in a way that is characteristic of the radiation. We establish the specific conditions under which this effect may be nonzero. The change in spin entropy and negativity, however, is extremely small. Here, we propose and show that this effect may be amplified through entanglement swapping. Relativistic quantum information theory may have a contribution towards the detection of gravitational waves.

03.65.Ud - Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.) .
03.67.-a - Quantum information.

© Europhysics Letters Association 2007