Reference

639 Block Reference

Every block available in the visual canvas. Drag any block from the palette, configure it in the Properties panel, and connect with wires.

Full Visual Engine Guide

This compatibility reference stays available for quick lookup. The exhaustive generated cookbook for every block, port, parameter, code generator, canvas action, and UI workflow lives on the Sansqrit Visual Engine page.

Total Blocks

Block Anatomy

Every block has:

Header — Block name + category, coloured by type
Parameters — Configurable in the Properties panel (right side)
Input ports — Left side, coloured by data type
Output ports — Right side, drag to draw wires

Port Colour	Data Type	Example
● Purple	Quantum register	Output of Quantum Register block
● Blue	Number	Measurement result (0 or 1)
● Teal	List	Array of numbers or strings
● Amber	Dictionary	Histogram {"00":503}
● Grey	String	Molecule name, filename
● Green	Any	Accepts any compatible type

Quantum Blocks

Registers (3 blocks)

Block ID	Label	Parameters	Description
`quantum_register`	Quantum Register	n_qubits, name	Creates n qubits all in state \|0⟩. Starting point for every circuit.
`register_slice`	Register Slice	start, end	Extracts a sub-range of qubits.
`multi_register`	Multi-Register	names, sizes	Creates multiple named registers at once.

Single-Qubit Gates (10 blocks)

Block ID	Gate	Effect
`hadamard`	H	\|0⟩→(\|0⟩+\|1⟩)/√2. Creates superposition.
`x_gate`	X	Bit flip. \|0⟩↔\|1⟩. Quantum NOT.
`y_gate`	Y	Bit + phase flip. \|0⟩→i\|1⟩, \|1⟩→-i\|0⟩.
`z_gate`	Z	Phase flip on \|1⟩. \|1⟩→-\|1⟩.
`s_gate`	S	Phase gate. \|1⟩→i\|1⟩. S²=Z.
`sdg_gate`	S†	Inverse S. \|1⟩→-i\|1⟩.
`t_gate`	T	π/8 gate. \|1⟩→e^(iπ/4)\|1⟩. T²=S.
`tdg_gate`	T†	Inverse T gate.
`sx_gate`	√X	Square root of X. SX²=X.
`identity`	I	Identity (no-op). Used for timing/barriers.

Two-Qubit Gates (9 blocks)

Block ID	Gate	Description
`cnot_gate`	CNOT / CX	Controlled-NOT. Most important entangling gate.
`cz_gate`	CZ	Controlled-Z. Symmetric. Native on Google Sycamore.
`cy_gate`	CY	Controlled-Y.
`swap_gate`	SWAP	Exchange quantum states. = 3 CNOTs.
`iswap_gate`	iSWAP	SWAP with i phase on \|01⟩ and \|10⟩.
`rzz_gate`	RZZ(θ)	Ising ZZ interaction. Used in QAOA cost unitaries.
`rxx_gate`	RXX(θ)	Mølmer-Sørensen XX. Native on IonQ hardware.
`ryy_gate`	RYY(θ)	Ising YY interaction.
`cp_gate`	CP(θ)	Controlled phase e^(iθ) on \|11⟩. Used in QFT.

Algorithm Blocks (8 blocks)

Block ID	Algorithm	Description
`vqe_block`	VQE	Variational Quantum Eigensolver. Inputs: molecule. Outputs: {energy, n_iter, converged}.
`qaoa_block`	QAOA	Quantum Approximate Optimisation. MaxCut, TSP, portfolio.
`grover_block`	Grover	O(√N) search. Inputs: n_qubits, target, shots.
`shor_block`	Shor	Integer factoring via quantum period finding.
`qpe_block`	QPE	Quantum Phase Estimation. Used in chemistry and HHL.
`qft_block`	QFT	Quantum Fourier Transform. Forward or inverse.
`teleport_block`	Teleportation	Full quantum teleportation protocol.
`vqs_block`	VQS	Variational Quantum Simulation. Real-time dynamics.

Chemistry & Drug Discovery

Chemistry Blocks (8 blocks)

Block ID	Label	What It Does
`molecule_builder`	Molecule Builder	Define molecular geometry, atoms, basis set
`vqe_chemistry`	VQE Chemistry	Full VQE pipeline with Hamiltonian generation
`orbital_analysis`	Orbital Analysis	HOMO/LUMO energies, orbital diagrams
`conformer_search`	Conformer Search	Find low-energy molecular conformations
`retrosynthesis`	Retrosynthesis	Predict synthetic routes to target molecules
`nmr_predictor`	NMR Predictor	Predict NMR chemical shifts
`excited_states`	Excited States	Calculate excited state energies
`dipole_moment`	Dipole Moment	Calculate molecular dipole moment

Drug Discovery (6 blocks)

Block ID	Label	What It Does
`virtual_screening`	Virtual Screening	Screen compound library against target protein
`molecular_docking`	Molecular Docking	Predict binding pose and affinity
`pharmacophore`	Pharmacophore	Extract pharmacophore features
`admet_prediction`	ADMET	Predict absorption, distribution, metabolism, excretion, toxicity
`similarity_search`	Similarity Search	Find similar compounds by fingerprint
`lead_optimisation`	Lead Optimisation	Suggest structural modifications

Machine Learning (20+ blocks)

QSVMVQCQuantum Kernel Quantum TransformerQGNNQRL XGBoostAutoMLNeural Network Random ForestSVMPCAt-SNE Prompt TemplateLLM Complete Vector StoreEmbeddingAgent

Data Sources & Transforms

CSV SourceJSON SourceSQL Source MongoDBParquet FilterGroup ByJoin SortPivotMeltImpute

Output & Charts

PrintLine ChartBar Chart HeatmapScatter Circuit DiagramResults Table

Utility Blocks

TimerAssertFor Loop ConditionalUUIDTimestamp HTTP RequestShell CommandWebhook Custom CodeCustom GateImport Library