Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Entanglement of optical photons using non-linear crystals has been around for a long time. Macroscopic entanglement using diamonds recently reported in the literature and receiving considerable attention. Quantum mechanics in biology has been the subject of fascinating research. Has anyone demonstrated entanglement of low frequency (i.e., microwave) photons? I see no theoretical objection, has it ever been demonstrated? Ditto entanglement at xray?

share|cite|improve this question

The first report on entangled microwaves seems to be http://arxiv.org/abs/1204.0732. A clear proof of spatially separated entanglement with degenerate frequencies is reported in http://arxiv.org/abs/1210.4413.

share|cite|improve this answer
    
Hi Bob. If you want to merge your 2 accounts go here. – Qmechanic 2 days ago

You can certainly entangle microwave photons with other quantum objects: http://arxiv.org/abs/1209.0441

share|cite|improve this answer
    
Well but my question is can you entangle two photons at microwave frequencies? – carl Oct 6 '12 at 2:47
    
It is very difficult to measure single microwave photons. Compare the per photon energy to that of a visible photon, and to the room temperature energy scale, $kT$. – user2963 Oct 6 '12 at 3:23

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.