TY - JOUR
T1 - Entanglement between degrees of freedom of single neutrons
AU - Hasegawa, Y.
AU - Badurek, G.
AU - Filipp, S.
AU - Klepp, J.
AU - Loidl, R.
AU - Sponar, S.
AU - Rauch, H.
N1 - Funding Information:
This work has been supported partly by the Japanese Science and Technology Agency (JST) and the Austrian Science Foundation (FWF) (Project no. F1513, P18943-N20 and P17803-N02).
PY - 2009/12/1
Y1 - 2009/12/1
N2 - Non-local correlations between subsystems sufficiently separated in spacetime have been extensively discussed in the light of the Einstein, Podolsky and Rosen (EPR) paradox, together with Bell's inequality. Within quantum terminology, such a non-locality can be interpreted as a consequence of the entanglement of subsystems. A more general concept, i.e., quantum contextuality, compared to non-locality, can be introduced to describe other striking phenomena predicted by quantum theory. As examples of quantum contextuality, we report several neutron interferometer experiments: a violation of a Bell-like inequality, a Kochen-Specker-like phenomenon, a quantum state tomography. Entanglement is achieved not between the particles, but between the degrees of freedom of a single-particle. Furthermore, an experiment dealing with triple entanglement is presented.
AB - Non-local correlations between subsystems sufficiently separated in spacetime have been extensively discussed in the light of the Einstein, Podolsky and Rosen (EPR) paradox, together with Bell's inequality. Within quantum terminology, such a non-locality can be interpreted as a consequence of the entanglement of subsystems. A more general concept, i.e., quantum contextuality, compared to non-locality, can be introduced to describe other striking phenomena predicted by quantum theory. As examples of quantum contextuality, we report several neutron interferometer experiments: a violation of a Bell-like inequality, a Kochen-Specker-like phenomenon, a quantum state tomography. Entanglement is achieved not between the particles, but between the degrees of freedom of a single-particle. Furthermore, an experiment dealing with triple entanglement is presented.
KW - Bell inequality
KW - Contextuality
KW - GHZ state
KW - Kochen-Specker theorem
KW - Neutron interferometer
KW - State tomography
UR - http://www.scopus.com/inward/record.url?scp=71649084094&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2009.07.060
DO - 10.1016/j.nima.2009.07.060
M3 - Article
AN - SCOPUS:71649084094
SN - 0168-9002
VL - 611
SP - 310
EP - 313
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 2-3
ER -