What is quantum computing?

What is quantum computing?

Quantum computing is a fascinating and complex field.

Here's an overview:

**Basics of Quantum Computing **

- Quantum Bits (Qubits):

Unlike classical computing, which uses bits that are either 0 or 1, quantum computing uses quantum bits, or qubits. Qubits can exist in a state of 0, 1, or both simultaneously, thanks to the principle of superposition. This allows quantum computers to process a vast amount of information at once. - Superposition:

It's a quantum phenomenon where a qubit can be in multiple states (both 0 and 1) at the same time. This contrasts with classical bits, which are definitively 0 or 1.

- Entanglement:

This is another quantum phenomenon where qubits become interconnected and the state of one qubit can depend on the state of another, no matter the distance between them. This interconnectedness can help in performing complex calculations more efficiently. - Quantum Gates:

In classical computing, we use logic gates (like AND, OR, NOT) to process information. In quantum computing, quantum gates manipulate the state of qubits. They are crucial for creating superposition and entanglement. - Quantum Decoherence:

This is a major challenge in quantum computing. Qubits are extremely sensitive to their environment, and even the smallest interference can cause them to lose their quantum properties, a process known as decoherence.

**Applications and Challenges **

- Applications:

Quantum computing holds potential in various fields such as cryptography, drug discovery, optimization problems, financial modeling, and more. Its ability to process complex calculations much faster than classical computers is particularly appealing. - Challenges:

Building stable qubits that can maintain their quantum state, scaling up the number of qubits for practical applications, and error correction are significant challenges in the field. - Current State:

As of now, quantum computers are in their early stages. They're not yet ready for widespread commercial use, primarily due to challenges related to decoherence and scalability.

**Conclusion**

Quantum computing represents a significant leap from classical computing, offering potential solutions to problems that are currently intractable. However, it's still a developing field, with ongoing research focused on overcoming its numerous challenges. The progress in this field is closely watched as it promises to revolutionize the way we process information.

Here is an illustration that visually represents key concepts of quantum computing. This image includes a futuristic quantum computer with glowing qubits, symbolizing the superposition of states. Additionally, it features a pair of entangled qubits, a quantum gate altering a qubit's state, and a representation of quantum decoherence. The background with a digital grid and quantum mechanics formulas adds to the educational aspect of the illustration.

### I hope this helped a little!π

Made with assistance of curitosity champion GPT

Recent Comments

51

I haven't hear the words "logic gates" since I was in college, Fleeky. Don't forget about your XOR, XNOR and XAND logic too! I'm trying to remember if there was a XNAND.π€

Isaiah π

Hi Isaiah

There is not a XNAND logic gate.

It would essentially have the same function as an XOR gate. π

Rock On! π€

Frank πΈ

Thanks for clarifying, Frank. It's slowly coming back to me now - logic gates, and the truth tables I used to complete from a combinatorial logic circuit. I'm a bit rusty and need to brush up on it. π€

No problem, Isaiah.

I used to analyze digital circuits with a logic probe and an oscilloscope.

The probe was a Hewlett-Packard, but I remember that Radio Shack sold a much cheaper version that still worked pretty good. Lol π

Frank πΈ

Hi Fleeky

I'm part of a team of mathematicians, physicists, and computer engineers doing research with quantum computing to develop Quantum Blockchain for future electronic health record security, privacy, and interoperability.

Quantum computers are only practical for commercial/industrial environments.

Most quantum computers operate at temperatures around -273Β°C (-459Β°F), which means they have to be supercooled.

Magnetic shielding to help prevent quantum decoherence is another issue. Quantum computers can require shielding that reduces the Earth's magnetic field by a factor of 100,000 or more.

At some point, home computers may be able to communicate with quantum computer co-processors, but this will be very cost-prohibitive.

Check out D Wave Systems to learn more:

https://www.dwavesys.com/

Frank πΈ

ππ awesome Frank

Thank you for sharing your own experience and link!

As for the QC

Some times i fear

IT is 2squared

Ps

cern is shut down several times a year... too costly

You're welcome, Fleeky. π

Now, think about this: We are rapidly reaching the point where AI will co-exist with quantum computing, which will be really interesting. Lol

One potentially big concern, in my opinion, is the combination of AI with advanced robotics. Check out what Boston Dynamics is doing. I've seen some of their "classified" technology, and it's very impressive!

https://bostondynamics.com/

Yes, between hardware/software upgrades and funding issues, CERN can be offline frequently.

Frank πΈ

Yep, Thanks, awesome indeed... great links!

As for CERN, Also energy... they consume as much as the whole city of Geneva...

So... perhaps moving the qc's to antartica would save a lot of energy or on the back side of the moon ...

ππππ

Hi Fleeky

Yes, energy is a major factor with a supercollider that big! Lol π

I don't think Antarctica would be particularly beneficial for quantum computing since it's right at the planet's magnetic south pole. Magnetic fields are a huge issue in QC.

Frank πΈ

Yes... perhaps we need a different type of approach...

- 0 +

Would enhance the computing and save tons of energy, now 2squared

Currently, server farms for classic (0 or 1) computers use more energy worldwide than quantum computers, especially for things like mining cryptocurrency, etc.

Hep indeed, no future because of that... burning the soil as they say

-1

0

+1

Would be better

And make it accessible for all

The egg of Columbo

Using quantum superposition to give 0, or 1, or 0 and 1 simultaneously can typically produce about 10,000 times more computational power.

However, I can't imagine that I'll still be around by the time they figure out a way to make quantum computing energy efficient. Lol π

Yeah, although Qubits can have negative probability wave amplitudes, quantum superposition has only been achieved for two probabilistic states simultaneously; even then, quantum decoherence happens very quickly. π

You could think of it as: -1 and zero simultaneously, but not as -1, 0, and +1 simultaneously. So it's helpful from a quantum modeling point of view, but the basic physics does not change.

Hi Fleeky

Definitely not in the realm of quantum physics. Alternating current just flips voltage amplitudes through zero.

For example, AC for common residential use in the USA cycles between +120 volts and -120 volts (through zero) at 60 cycles per second for single and poly-phase alternators. π

Frank πΈ

Yes, the magnitude as a function of time in that example would vary between [zero and +120 volts] and [zero and -120 volts]. However, the current is not practically usable as discrete vectors in common household items. π

Hey Kyle, we want some of these!

On second thought, I bet you have one in your basement right now...:-)

Uh... what makes you think I am Kyle?

As for the qc,

i have one very little tiny ice qubit

in the freezer of my kitchen

and some times it complains

it is not cold enough

πππ

Hi Fleeky, I know you're not Kyle...I figured he would be reading this, though...

Yes, those little buggers do like the cold...

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Ps

This image is one of my favorite posters...