Quantum Teleportation of Energy

[sanman]

As you know a Prof Hotta of Japan has come up with a theory on how there can be quantum teleportation of energy, and not just of information states.

What are the greater implications of this? What practical applications might become possible?

Could we one day power "nanobots" using the mechanism of quantum energy teleportation?

He points out that the measurement on the first particle injects quantum energy into the system. He then shows that by carefully choosing the measurement to do on the second particle, it is possible to extract the original energy.

So how do we know what measurement to make on the second particle? Again, only by relying on classical communication? In which case we can't "quantum-transmit" our energy anywhere that classical transmission techniques won't get to.

 

[DrChinese]

Reference for that:Energy-Entanglement Relation for Quantum Energy Teleportation (2010)

"Protocols of quantum energy teleportation (QET), while retaining causality and local energy conservation, enable the transportation of energy from a subsystem of a many-body quantum system to a distant subsystem by local operations and classical communication through ground-state entanglement. We prove two energy-entanglement inequalities for a minimal QET model. These relations help us to gain a profound understanding of entanglement itself as a physical resource by relating entanglement to energy as an evident physical resource. "

Also from 2009:

http://arxiv.org/abs/0911.3430

"Ground-state entanglement induces emergence of negative-energy-density regions in quantum systems by squeezing zero-point oscillation, keeping total energy of the systems nonnegative. By use of the negativity of quantum energy density, protocols of quantum energy teleportation are proposed that transport energy to distant sites by local operations and classical communication. The energy is teleported without breaking any physical laws including causality and local energy conservation. Because intermediate subsystems of the energy transfer channel are not excited during the protocol execution, the protocol attains energy transportation without heat generation in the channel. We discuss the protocol focusing around qubit chains. In addition, we address a related problem of breaking ground-state entanglement by measurements."

 

[spikenigma]

Can we please have one of our resident physicists weigh in on this? - and any possible applications it may have?

The mind tends to run wild with possibilities of lossless wireless power transmission over thousands of miles and the like. Whilst most fantastical world-changing discoveries tend to start with someone saying "huh?,isn't that little effect funny? " the bitter reality for these announcements is always more mundane

 

[Fightfish]

Indeed, this does bring about many queries and thoughts. Though I'm not quite thinking along the same line as you about possible applications, but rather more technical issues to do with the teleportation process. I think it would be interesting to consider how the effects of noise would affect the energy recovery process.

 

[sanman]

Indeed, this does bring about many queries and thoughts. Though I'm not quite thinking along the same line as you about possible applications, but rather more technical issues to do with the teleportation process. I think it would be interesting to consider how the effects of noise would affect the energy recovery process.

I assume the effects of the noise would be the same as in decoherence, whereby the energy is "lost to the vacuum" in the same manner that information would be lost.

I'm surprised it took someone so long to see this new effect, since energy is just a state, and quantum communication is all about states too.

 

[Frame Dragger]

Hmmmm... I may use this in some fiction writing.

 

[Fightfish]

"Lost to the vacuum"? Would that not violate conservation of energy?

 

[sanman]

"Lost to the vacuum"? Would that not violate conservation of energy?

Why? If we consider the Vacuum to be part of the system, as the intermediary, then energy is conserved. Perhaps it is the increase in energy of the Vacuum that permits the entanglement to exist across a distance.

I'm wondering if one could somehow perform a Bell's Inequality experiment to show the extend to which energy is conserved across a distance through entanglement.