Quantum computing with superconductors

In summary, the current status of gate fidelity and coherence times in quantum computing has been improving but still faces challenges, particularly with scalability. The approach of using superconductors for quantum computing may not be the most effective, and current research is also focusing on other areas such as virtual conferences and recent reviews to address these issues. However, it's important to note that all numbers need context, as smaller circuits may have better numbers due to fewer challenges, and coherence times for superconducting qubits can fluctuate over time.
  • #1
annaphys
69
1
I have some questions to this Ansatz and I would really appreciate it if I can get some insight:

1. What is the current status of gate fidelity and what are the current struggles to improve it?
2. Same question but with coherence times.
3. What are the current issues with scalability?
4. Could qc with superconductors be the wrong approach?
5. Is there anything else that the current research is focusing on?
 
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  • #2
  • #3
You should be able to find some current numbers just by Googling. For the rest of the questions I would suggest reading a recent review
E.,g.
https://www.nature.com/articles/s41578-021-00370-4
(I believe there is a free preprint version available if you don't have access)

Note that all numbers need some context. It is much easier to achieve good numbers for both coherence and fidelity in small circuits (2-qubits) where there are fewer challenges when it comes to fabrication, control and you don't have to worry about e.g. crosstalk
Also, coherence times for SC qubits fluctuate over time (by sometimes as much as 2-3 times). meaning a single number doesn't necessarily tell you very much about how well a circuit would run
 
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FAQ: Quantum computing with superconductors

What is quantum computing with superconductors?

Quantum computing with superconductors is a type of quantum computing that uses superconducting materials, which are materials that have zero electrical resistance at very low temperatures. This allows for the creation of quantum bits (qubits) that can store and process information in a quantum state.

How does quantum computing with superconductors differ from traditional computing?

Traditional computing uses binary bits (0s and 1s) to store and process information, while quantum computing with superconductors uses qubits that can exist in multiple states at the same time. This allows for much faster and more efficient processing of complex problems.

What are the potential applications of quantum computing with superconductors?

Quantum computing with superconductors has the potential to revolutionize many industries, including finance, healthcare, and cybersecurity. It can be used to solve complex optimization problems, simulate quantum systems, and break encryption codes.

What are the challenges facing quantum computing with superconductors?

One of the main challenges is the requirement for extremely low temperatures (near absolute zero) to maintain the superconducting state of the materials. This makes it difficult to scale up quantum computers for practical use. There are also challenges in controlling and manipulating qubits without introducing errors.

How close are we to achieving practical quantum computing with superconductors?

While significant progress has been made in developing quantum computers with superconductors, there are still many technical challenges that need to be overcome. It is difficult to predict an exact timeline, but experts estimate that it could take several more years to achieve practical quantum computing with superconductors.

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