QubitHub

Circuit Repository

Browse reproducible quantum circuits with rich metadata.
52 TOTAL CIRCUITS

Circuits (52)

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/smoke-track-a-8
00

Smoke Track A #8

Track A #8 staging smoke test

qiskit20
/quantum-kernel-svm
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Quantum Kernel SVM

Quantum Kernel SVM — Classification in Hilbert Space What You'll Learn: How quantum kernels K(x,y) = |⟨φ(x)|φ(y)⟩|² enab...

AdvancedMachine_Learning+4
pennylane48
/bit-flip-code
00

3-Qubit Bit Flip Code

3-Qubit Bit-Flip Code What You'll Learn: How quantum error correction encodes logical qubits into physical qubits How sy...

IntermediateError_Correction+3
qiskit34
/fidelity-kernel
00

Fidelity Kernel (SWAP Test)

Fidelity Quantum Kernel — SWAP Test What You'll Learn: How the SWAP test uses quantum interference to measure state over...

AdvancedMachine_Learning+4
pennylane56
/trainable-kernel
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Trainable Quantum Kernel

Trainable Quantum Kernel — KTA Optimization What You'll Learn: How adding learnable parameters to a quantum feature map ...

AdvancedMachine_Learning+4
pennylane44
/hardware-efficient-ansatz
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Hardware-Efficient Ansatz

Hardware-Efficient Ansatz (HEA) A parameterized quantum circuit designed for NISQ devices that uses native gate sets and...

AdvancedAnsatz+3
cirq48
/shor-code
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Shor's 9-Qubit Code

Shor's 9-Qubit Code Overview Shor's code is the first quantum error correcting code (1995), proving that quantum informa...

IntermediateError_Correction+4
qiskit94
/lih-excited-states
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LiH Excited States

VQE for LiH Excited States — 4-Qubit VQD What You'll Learn: How VQD scales from 2-qubit H2 to 4-qubit LiH with a richer ...

AdvancedChemistry+3
qiskit44
/uccsd-ansatz
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UCCSD Ansatz

UCCSD Ansatz What You'll Learn: How the gold-standard quantum chemistry ansatz encodes electron correlation into a param...

AdvancedAnsatz+3
cirq45
/vqd-algorithm
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VQD Algorithm

Variational Quantum Deflation (VQD) — General Implementation What You'll Learn: How VQD scales to larger systems (4 qubi...

AdvancedChemistry+3
qiskit46
/ssvqe
00

SSVQE Algorithm

Subspace-Search VQE (SSVQE) What You'll Learn: How to find multiple eigenstates in a single optimization, not sequential...

AdvancedChemistry+3
qiskit45
/surface-code
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Surface Code (Distance-3)

Surface Code (Distance-3) Overview The surface code is a topological quantum error correcting code and the leading candi...

IntermediateError_Correction+5
qiskit177
/steane-code
00

Steane's 7-Qubit Code

Steane's 7-Qubit Code Overview Steane's code is a [[7,1,3]] CSS code — it encodes 1 logical qubit into 7 physical qubits...

IntermediateError_Correction+4
qiskit75
/h2-excited-states
00

H2 Excited States (VQD)

VQE for H2 Excited States — Variational Quantum Deflation (VQD) What You'll Learn: How to find excited states of molecul...

AdvancedChemistry+4
qiskit24
/data-reuploading
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Data Re-uploading Classifier

Data Re-uploading Classifier Overview Data re-uploading is a quantum classification technique that achieves universal ap...

IntermediateMachine_Learning+4
qiskit14
/angle-encoding
10

Angle Encoding

Angle Encoding (Rotation Encoding) Overview Angle encoding is the simplest and most hardware-efficient quantum data enco...

IntermediateMachine_Learning+4
qiskit46
/multistate-vqe
00

Multistate VQE

Multistate Contracted VQE (MC-VQE) What You'll Learn: How to find multiple eigenstates simultaneously using a contracted...

AdvancedChemistry+3
qiskit46
/quantum-teleportation
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Quantum Teleportation

Quantum Teleportation What You'll Learn: How to transfer a quantum state from one qubit to another using a shared entang...

BeginnerCommunication+2
qiskit33
/knapsack
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QAOA for Knapsack

QAOA for 0/1 Knapsack Problem What You'll Learn: How to map a constrained optimization problem to an unconstrained QUBO ...

IntermediateOptimization+3
qiskit33
/phase-estimation
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Quantum Phase Estimation

Quantum Phase Estimation (QPE) > Prerequisites: Quantum Fourier Transform -- QPE uses the inverse QFT as its core readou...

AdvancedAlgorithm+4
qiskit44