Cloning Entangled Qubits to Scales One Can See

Details Cloning Entangled Qubits to Scales One Can See Cloning Entangled Qubits to Scales One Can See

2010-05-27

arxiv.org/abs/1005.5083v1

Phys. Rev. A 82 (2010)

Physics

Quantum Physics

15 pages, 9 figures

Scientific paper

10.1103/PhysRevA.82.053814

By amplifying photonic qubits it is possible to produce states that contain enough photons to be seen with a human eye, potentially bringing quantum effects to macroscopic scales [1]. In this paper we theoretically study quantum states obtained by amplifying one side of an entangled photon pair with different types of optical cloning machines for photonic qubits. We propose a detection scheme that involves lossy threshold detectors (such as human eye) on the amplified side and conventional photon detectors on the other side. We show that correlations obtained with such coarse-grained measurements prove the entanglement of the initial photon pair and do not prove the entanglement of the amplified state. We emphasize the importance of the detection loophole in Bell violation experiments by giving a simple preparation technique for separable states that violate a Bell inequality without closing this loophole. Finally we analyze the genuine entanglement of the amplified states and its robustness to losses before, during and after amplification.

Affiliated with

Also associated with

No associations

Rating

Cloning Entangled Qubits to Scales One Can See does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cloning Entangled Qubits to Scales One Can See, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cloning Entangled Qubits to Scales One Can See will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-192569