3-qubit repetition code that encodes 1 logical qubit and corrects single bit-flip (X) errors.

• Updated Feb 19, 2026

Demonstrate the phase kickback trick: a CNOT with ancilla in |-> imprints a phase on the control qubit.

• Updated Feb 19, 2026
• OpenQASM

3-qubit code that corrects single phase-flip (Z) errors by encoding in the X basis.

• Updated Feb 19, 2026

Teleport an arbitrary single-qubit state from Alice to Bob using a shared Bell pair and two classical bits.

• Updated Feb 19, 2026
• OpenQASM

W state: symmetric 3-qubit entangled state (|001> + |010> + |100> )/3.

• Updated Feb 19, 2026
• OpenQASM

Count the number of solutions to a 2-qubit oracle (marks |11> ) using QPE applied to Grover's operator.

• Updated Feb 19, 2026
• OpenQASM

Find the hidden period s='11' of a 2-to-1 function f(x) = f(xs) with exponential quantum speedup.

• Updated Feb 19, 2026
• OpenQASM

Quadratic speedup for unstructured search: finds |11> among 4 basis states with one Grover iteration.

• Updated Feb 19, 2026
• OpenQASM

Fair coin flipping over a quantum channel: Alice and Bob each contribute randomness via entanglement.

• Updated Feb 19, 2026
• OpenQASM

One first-order Trotter step simulating the 1D transverse-field Ising model on 4 qubits (J=1, h=0.5, dt=0.1).

• Updated Feb 19, 2026

Reversible quantum half-adder: computes sum = a XOR b and carry = a AND b for 1-bit inputs.

• Updated Feb 19, 2026
• OpenQASM

Estimate the eigenphase ph=1/8 of the T gate: U|ps> =e^{i2pph}|ps> using 3 counting qubits.

• Updated Feb 19, 2026
• OpenQASM

Generate 4 truly random bits using quantum superposition and measurement.

• Updated Feb 19, 2026
• OpenQASM

4-qubit Quantum Fourier Transform (QFT): the quantum analogue of the discrete Fourier transform.

• Updated Feb 19, 2026
• OpenQASM

3-party quantum secret sharing using a GHZ state: Alice distributes a secret that requires Bob and Charlie to cooperate.

• Updated Feb 19, 2026
• OpenQASM

Core period-finding subroutine of Shor's algorithm: find the period r of f(x) = 7^x mod 15.

• Updated Feb 19, 2026
• OpenQASM

Estimate Re( ) for U=Z gate and |ps> =|+> using a single ancilla qubit.

• Updated Feb 19, 2026
• OpenQASM

Preparation of the maximally entangled two-qubit Bell state |Ph+> = (|00> + |11> )/2.

• Updated Feb 19, 2026
• OpenQASM

Estimate the amplitude a = sin2(p/8) 0.146 using 3 precision qubits via quantum phase estimation.

• Updated Feb 19, 2026
• OpenQASM

First quantum error-correcting code: encodes 1 logical qubit into 9 physical qubits, correcting any single-qubit error.

• Updated Feb 19, 2026
• OpenQASM