GENERATING ENTANGLED QUBITS AND QUDITS WITH FULLY ON-CHIP PHOTONIC QUANTUM SOURCE

As the world of computing and communication draws ever closer to a quantum future, researchers are faced with many of the similar challenges encountered with classical computing and the associated semiconductor hurdles. For the use of entangled photon pairs, for example, it was already possible to perform the entanglement using miniaturized photonic structures, but these still required a bulky external laser source. In a recently demonstrated first, a team of researchers have created a fully on-chip integrated laser source with photonic circuitry that can perform all of these tasks without external modules.

In their paper published in Nature Photonics, Hatam Mahmudlu and colleagues cover the process in detail. Key to this achievement was finding a way to integrate the laser and photonics side into a single, hybric chip while overcoming the (refractive) mismatch between the InP optical amplifier and Si3N4 waveguide feedback circuit. The appeal of photon-based quantum entanglement should be obvious when one considers the relatively stable nature of these pairs and their compatibility with existing optical (fiber) infrastructure. What was missing previously was an economical and compact way to create these pairs outside of a laboratory setup. Assuming that the described approach can be scaled up for mass-production, it may just make quantum communications a realistic option outside of government organizations.

HarveyH55 wrote:
Link

[img]https://hackaday.com/wp-content/uploads/2023/04/nature_photonics_2023_photonic_quantum_qubit_light_source.jpg?w=800[/img]

As the world of computing and communication draws ever closer to a quantum future, researchers are faced with many of the similar challenges encountered with classical computing and the associated semiconductor hurdles. For the use of entangled photon pairs, for example, it was already possible to perform the entanglement using miniaturized photonic structures, but these still required a bulky external laser source. In a recently demonstrated first, a team of researchers have created a fully on-chip integrated laser source with photonic circuitry that can perform all of these tasks without external modules.

In their paper published in Nature Photonics, Hatam Mahmudlu and colleagues cover the process in detail. Key to this achievement was finding a way to integrate the laser and photonics side into a single, hybric chip while overcoming the (refractive) mismatch between the InP optical amplifier and Si3N4 waveguide feedback circuit. The appeal of photon-based quantum entanglement should be obvious when one considers the relatively stable nature of these pairs and their compatibility with existing optical (fiber) infrastructure. What was missing previously was an economical and compact way to create these pairs outside of a laboratory setup. Assuming that the described approach can be scaled up for mass-production, it may just make quantum communications a realistic option outside of government organizations.

Another example of just how far off quantum computers are from any practical application outside of a lab. Should also note, this is just paper, and not an actual prototype. It'll still be many years, presuming they can get somebody with the money, and specialty equipment to fabricate their proposal.

HarveyH55 wrote:Another example of just how far off quantum computers are from any practical application outside of a lab.

GENERATING ENTANGLED QUBITS AND QUDITS WITH FULLY ON-CHIP PHOTONIC QUANTUM SOURCE
by: Maya Posch
Key to this achievement was finding a way to integrate the laser and photonics side into a single, hybric chip while overcoming the (refractive) mismatch between the InP optical amplifier and Si3N4 waveguide feedback circuit. The appeal of photon-based quantum entanglement should be obvious when one considers the relatively stable nature of these pairs and their compatibility with existing optical (fiber) infrastructure.

Natural Intraseasonal and Interannual Variability
Dennis L. Hartmann
One objective way of searching for important patterns in SST variability is EOF analysis. For example, if we start with monthly anomalies of SST over the globe, then the first pattern that comes out is ENSO, and it explains about 17% of the global SST variance, much more than any other mode of variability.

Measuring Ocean Acidification: New Technology for a New Era of Ocean Chemistry
Robert H. Byrne
The declining concentration ratio shown here, in conjunction with similar data at diverse locations around the world, indicates that major global change is occurring in the equilibrium status of chemical reactions in the oceans. The increasing departure of the carbonate:bicarbonate concentration ratio from a value of 1 (i.e., the point of maximum buffer intensity) shows that the ability of the oceans' surface layer to buffer pH excursions (including those attributable to local processes such as photosynthesis and respiration) is declining. The concentration ratios shown here were calculated from measurements of pH, S, and T. The black line shows the least-squares best-fit slope: −4.444 (±0.383) × 10–4 yr–1.

HarveyH55 wrote:
Link

[img]https://hackaday.com/wp-content/uploads/2023/04/nature_photonics_2023_photonic_quantum_qubit_light_source.jpg?w=800[/img]

As the world of computing and communication draws ever closer to a quantum future, researchers are faced with many of the similar challenges encountered with classical computing and the associated semiconductor hurdles. For the use of entangled photon pairs, for example, it was already possible to perform the entanglement using miniaturized photonic structures, but these still required a bulky external laser source. In a recently demonstrated first, a team of researchers have created a fully on-chip integrated laser source with photonic circuitry that can perform all of these tasks without external modules.

In their paper published in Nature Photonics, Hatam Mahmudlu and colleagues cover the process in detail. Key to this achievement was finding a way to integrate the laser and photonics side into a single, hybric chip while overcoming the (refractive) mismatch between the InP optical amplifier and Si3N4 waveguide feedback circuit. The appeal of photon-based quantum entanglement should be obvious when one considers the relatively stable nature of these pairs and their compatibility with existing optical (fiber) infrastructure. What was missing previously was an economical and compact way to create these pairs outside of a laboratory setup. Assuming that the described approach can be scaled up for mass-production, it may just make quantum communications a realistic option outside of government organizations.

Another example of just how far off quantum computers are from any practical application outside of a lab. Should also note, this is just paper, and not an actual prototype. It'll still be many years, presuming they can get somebody with the money, and specialty equipment to fabricate their proposal.

HarveyH55 wrote:
Funny, how you only understand copy/paste... Stick to planting tomatoes.

Swan wrote:

HarveyH55 wrote:
Link

[img]https://hackaday.com/wp-content/uploads/2023/04/nature_photonics_2023_photonic_quantum_qubit_light_source.jpg?w=800[/img]

As the world of computing and communication draws ever closer to a quantum future, researchers are faced with many of the similar challenges encountered with classical computing and the associated semiconductor hurdles. For the use of entangled photon pairs, for example, it was already possible to perform the entanglement using miniaturized photonic structures, but these still required a bulky external laser source. In a recently demonstrated first, a team of researchers have created a fully on-chip integrated laser source with photonic circuitry that can perform all of these tasks without external modules.

In their paper published in Nature Photonics, Hatam Mahmudlu and colleagues cover the process in detail. Key to this achievement was finding a way to integrate the laser and photonics side into a single, hybric chip while overcoming the (refractive) mismatch between the InP optical amplifier and Si3N4 waveguide feedback circuit. The appeal of photon-based quantum entanglement should be obvious when one considers the relatively stable nature of these pairs and their compatibility with existing optical (fiber) infrastructure. What was missing previously was an economical and compact way to create these pairs outside of a laboratory setup. Assuming that the described approach can be scaled up for mass-production, it may just make quantum communications a realistic option outside of government organizations.

Another example of just how far off quantum computers are from any practical application outside of a lab. Should also note, this is just paper, and not an actual prototype. It'll still be many years, presuming they can get somebody with the money, and specialty equipment to fabricate their proposal.

LOL Qubits are already being entangled in the real World, not just on paper. Silly

Swan wrote:
Prof Yin's experiment, which was a bit more complicated in detail than the above simplification, observed no difference in polarization direction. The time it would take light to travel between Alice and Bob was about 50 μs, while the action of the entanglement dynamics had to be less than 0.35 ns. The minimum speed of the entanglement influence is just the one divided by the other, or 144,500 times the speed of light. However, a number of factors go into the interpretation of the results, which reduce the lower limit of the speed of entanglement influence to about 10,000 times the speed of light.

Swan wrote:
Notice that this result does not eliminate the possibility that the influence of entanglement actually is instantaneous – it merely sets a limit saying how close the influence must be to infinitely fast. Another possibility that is gaining credence is that entanglement dynamics may operate external to time, or at least may ignore time as it ignores distance.

Swan wrote:
Niels Bohr, one of the prime developers of quantum theory, once said that those who are not shocked when they first encounter quantum theory cannot possibly have understood it. (as you can't) Eighty years later, this is still true, and applies even to those of us who first encountered quantum theory decades ago. It has been refined into an amazing tool, but we are woefully lacking in the ability to say how the world can work this way. Hope springs eternal.

Swan wrote:

HarveyH55 wrote:
Funny, how you only understand copy/paste... Stick to planting tomatoes.

When I copy and paste you cannot argue the point with me as you are forced to argue with MIT, CAL Tech or whomever, which makes you the silly clown.

Now tell us again that Einstoopud said that nothing can ever travel faster than light, because I need my daily laugh!

Into the Night wrote:

Swan wrote:

HarveyH55 wrote:
Funny, how you only understand copy/paste... Stick to planting tomatoes.

When I copy and paste you cannot argue the point with me as you are forced to argue with MIT, CAL Tech or whomever, which makes you the silly clown.

Now tell us again that Einstoopud said that nothing can ever travel faster than light, because I need my daily laugh!

You are not quoting MIT or CAL Tech. You are quoting individuals. Colleges and universities do not speak or post.

Swan wrote:

Into the Night wrote:You are not quoting MIT or CAL Tech. You are quoting individuals. Colleges and universities do not speak or post.

Actually Universities are made up of individuals, and the leaders of area's often are the spokesperson for the unit.

IBdaMann wrote:

Swan wrote:

Into the Night wrote:You are not quoting MIT or CAL Tech. You are quoting individuals. Colleges and universities do not speak or post.

Actually Universities are made up of individuals, and the leaders of area's often are the spokesperson for the unit.

When you pretend to quote a "university," why shouldn't any presume you are simply quoting the wrong individuals?

Swan wrote:

Into the Night wrote:

Swan wrote:

HarveyH55 wrote:
Funny, how you only understand copy/paste... Stick to planting tomatoes.

When I copy and paste you cannot argue the point with me as you are forced to argue with MIT, CAL Tech or whomever, which makes you the silly clown.

Now tell us again that Einstoopud said that nothing can ever travel faster than light, because I need my daily laugh!

You are not quoting MIT or CAL Tech. You are quoting individuals. Colleges and universities do not speak or post.

Actually Universities are made up of individuals, and the leaders of area's often are the spokesperson for the unit.

Swan wrote:

IBdaMann wrote:

Swan wrote:

Into the Night wrote:You are not quoting MIT or CAL Tech. You are quoting individuals. Colleges and universities do not speak or post.

Actually Universities are made up of individuals, and the leaders of area's often are the spokesperson for the unit.

When you pretend to quote a "university," why shouldn't any presume you are simply quoting the wrong individuals?

MIT Entanglement open course

Into the Night wrote:

Swan wrote:

IBdaMann wrote:

Swan wrote:

Into the Night wrote:You are not quoting MIT or CAL Tech. You are quoting individuals. Colleges and universities do not speak or post.

Actually Universities are made up of individuals, and the leaders of area's often are the spokesperson for the unit.

When you pretend to quote a "university," why shouldn't any presume you are simply quoting the wrong individuals?

MIT Entanglement open course

It is not possible to entangle particles on command. You are still discarding quantum mechanics.

Swan wrote:

Into the Night wrote:

Swan wrote:

IBdaMann wrote:

Swan wrote:

Into the Night wrote:You are not quoting MIT or CAL Tech. You are quoting individuals. Colleges and universities do not speak or post.

Actually Universities are made up of individuals, and the leaders of area's often are the spokesperson for the unit.

When you pretend to quote a "university," why shouldn't any presume you are simply quoting the wrong individuals?

MIT Entanglement open course

It is not possible to entangle particles on command. You are still discarding quantum mechanics.

Actually

Into the Night wrote:

Swan wrote:

Into the Night wrote:

Swan wrote:

IBdaMann wrote:

Swan wrote:

Into the Night wrote:You are not quoting MIT or CAL Tech. You are quoting individuals. Colleges and universities do not speak or post.

Actually Universities are made up of individuals, and the leaders of area's often are the spokesperson for the unit.

When you pretend to quote a "university," why shouldn't any presume you are simply quoting the wrong individuals?

MIT Entanglement open course

It is not possible to entangle particles on command. You are still discarding quantum mechanics.

Actually

Mantra 40a.

Swan wrote:

Into the Night wrote:

Swan wrote:

Into the Night wrote:

Swan wrote:

IBdaMann wrote:

Swan wrote:

Into the Night wrote:You are not quoting MIT or CAL Tech. You are quoting individuals. Colleges and universities do not speak or post.

Actually Universities are made up of individuals, and the leaders of area's often are the spokesperson for the unit.

When you pretend to quote a "university," why shouldn't any presume you are simply quoting the wrong individuals?

MIT Entanglement open course

It is not possible to entangle particles on command. You are still discarding quantum mechanics.

Actually

Mantra 40a.

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