Posted on 07/16/2019 4:14:38 PM PDT by BenLurkin
The more entanglement in the so-called Hilbert space—the realm where quantum information processing can take place—the better.
Previous photonic approaches were able to reach 18 qubits encoded in six entangled photons in the Hilbert space. Purdue researchers maximized entanglement with a gate using four qudits—the equivalent of 20 qubits—encoded in only two photons.
In quantum communication, less is more. "Photons are expensive in the quantum sense because they're hard to generate and control, so it's ideal to pack as much information as possible into each photon," said Poolad Imany, a postdoctoral researcher in Purdue's School of Electrical and Computer Engineering.
The team achieved more entanglement with fewer photons by encoding one qudit in the time domain and the other in the frequency domain of each of the two photons. They built a gate using the two qudits encoded in each photon, for a total of four qudits in 32 dimensions, or possibilities, of both time and frequency. The more dimensions, the more entanglement.
Starting from two photons entangled in the frequency domain and then operating the gate to entangle the time and frequency domains of each photon generates four fully-entangled qudits, which occupy a Hilbert space of 1,048,576 dimensions, or 32 to the fourth power.
Typically, gates built on photonic platforms to manipulate quantum information encoded in separate photons work only some of the time because photons naturally don't interact with each other very well, making it extremely difficult to manipulate the state of one photon based on the state of another. By encoding quantum information in the time and frequency domains of photons, Purdue researchers made operating the quantum gate deterministic as opposed to probabilistic.
(Excerpt) Read more at phys.org ...
I read that article twice.
I am still not sure what they are doing. But they seem pretty happy about it. So, that’s good.
This can only mean one thing...more and faster porn.
They plan on using qudits to make widgets...
Clarification, AI controlled widgets
[”Photons are expensive in the quantum sense because they’re hard to generate and control, so it’s ideal to pack as much information as possible into each photon,”]
Means those Photon Torpedoes are really, really expensive.
Lotus Notes, Office 365, and Skype For Business still won’t be able to run with enough resources.
What weapons system isn’t?
I don't know why a Hilbert space is "so-called," when the term is considerably older than the term "quantum entanglement."
With government oversight and defense contractors, big price tags come with the territory.
More rights violations... I know lots of photons which are "probabilistic" and forcing them to be "deterministic" is a clear case of deterministicphiles violating the rights of the "probabilistic" population...
Is that anything like a vacuum tube?
Quidits??? Are they crazy? Harry Potter almost got killed during that game.
It’s like totally the same, and totally different. Just like quantum physics.
Very interesting.
But is it qudits or qubits?
They have both in the article, clearly talking about the same thing.
Will this improve the test pattern? Cool.
We’ve come a long way since Newton’s tidbits.
“They must use a caulking gun and a trowel and several buckets. Probably a sprayer, too.”
When they ask for a billion or so for further research we’ll pay closer attention.
True. Or road-work in my area.
We have two seasons: Winter and Construction.
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