- #1
Albert V
- 26
- 0
Hi,
I have a question about how to interpret the state of an entangled photon
H = horisontal, V = vertical polarization
The global state is |Phi> = (|H>|V> + |V>|H>)/sqrt2.
By density operator formalism:
rho = |Phi><Phi|
= (1/2) ( |H>|V><H|<V| + |H>|V><V|<H| + |V>|H><H|<V| + |V>|H><V|<H| ).
in order to find the state on the right side, trace out the left side :
rho_right = Tr_left(rho) = (1/2) (|H><H|+|V><V|),
How should this state be interpreted? 1) as a photon EITHER in H OR V, or 2) a mixed state (superposition) containing components of both the left and the right side.
This would help me to understand this paper:
http://arxiv.org/abs/1301.1673
I have a question about how to interpret the state of an entangled photon
H = horisontal, V = vertical polarization
The global state is |Phi> = (|H>|V> + |V>|H>)/sqrt2.
By density operator formalism:
rho = |Phi><Phi|
= (1/2) ( |H>|V><H|<V| + |H>|V><V|<H| + |V>|H><H|<V| + |V>|H><V|<H| ).
in order to find the state on the right side, trace out the left side :
rho_right = Tr_left(rho) = (1/2) (|H><H|+|V><V|),
How should this state be interpreted? 1) as a photon EITHER in H OR V, or 2) a mixed state (superposition) containing components of both the left and the right side.
This would help me to understand this paper:
http://arxiv.org/abs/1301.1673