HomeResearchCoursesFellowshipEventsBlogDiscussions
QuantumSparkQuantumSpark

Research-grade quantum learning, papers, textbooks, mentorship, and project work for motivated students.

Platform

  • Research
  • Courses
  • Mentorship
  • Events

Resources

  • Blog
  • Research Standards
  • Papers
  • Textbooks

Trust

  • Terms
  • Privacy
  • Cookies
  • Security

Updates

Occasional notes on new resources, workshops, and student research opportunities.

© 2026 QuantumSpark.

Built for careful learning, reproducible work, and early research fluency.

Home Explore

Communities

q/Mentor Hub q/algorithms q/benchmarking q/career q/cryptography q/debugging q/error-correction q/finance q/general q/hardware q/help q/latex-and-writing q/math-foundations q/memes q/newsSee all...

q/help

Debugging, maths help, and beginner questions.

Create Post

Top Communities

1
q/Mentor Hub
2
q/algorithms
3
q/benchmarking
4
q/career
5
q/cryptography

q/help

Community Hub

Post

Debugging, maths help, and beginner questions.

PostsWikiResources
72
q/help•
u/Alice Quantum
• 5 months agoHELP

Understanding Phase Kickback in Deutsch-Jozsa

I get the math, but I don't intuitively 'feel' how the oracle bit flips the phase of the control qubit. Can someone explain it like I'm 5?

3 Comments
Share
Report
42
q/help•
u/Alice JohnsonMENTOR
• 5 months agoHELP

Why does my GHZ state have such low fidelity?

Running on `ibm_brussels`. The counts for |000> and |111> are high, but I see a lot of noise in between. Is this T1 decoherence or just readout error?

3 Comments
Share
Report