# Learn about quantum computing and algorithm on quantum computing

### Related tags

Deep Learning quantum_computing

# quantum_computing

this repo contains everything i learn about quantum computing and algorithm on quantum computing

## what is aquantum computing

quantum computing is an area of study focused on the development of computer based technologies centered around the principles of quantum theory. quantum computing uses a combination of bits to perform specific computational taks. all at much higher efficiency than their classical counterparts. development of quantum computers mark a leap forward in computing capability, with massive performance gains for specifig use cases. for example quantum computing excels at like simulations.

## working with quantum

to code any quantum circuit, step

1. build design a quantum circuit that represent the problem considering
2. execute run a circuits on a backedn, either a system or a simulator
3. analyze calculate summary statistic and visualize the result of circuit jobs

simple code to build circuit

circuit = QuantumCircuit(2,2)

# add a H gate on qubit 0
circuit.h(0)

# add a CX(CNOT) gate control qubit 0 and target qubit 1
circuit.cx(0, 1)

# map the quantum measurement to the classical bits
circuit.measure([0, 1], [0,1])

explanation

first, initialize two qubits in the zero state and two classical bits in the zero state in the quantum circuit called circuit:

circuit = QuantumCircuit(2, 2)

next, add gates that manipulate th qubits in circuit to frm bell state:

in this state, there is a 50% chance of finding both qubits to have the value 0 and a 50% chance of finding both qubits to have the value 1.

gates:

• QuantumCircuit.h(0)

A handmard gate (h) on qubit 0, which puts it into a superposition state

• QuantumCircuit.cx(0, 1)

A controlled-NOT operantion (CX) on control qubit 0 and target qubit 1, putting the qubits in an entangled state.

• QuantumCircuit.measure([0, 1], [0, 1])

The first argument indexes the qubits; the second argument indexes the classical bits, then the n qubit's measueremtn result ill be stroed in the n classical bit.

circuit.h(0)
circutir.cx(0, 1)
circuit.measure([0, 1], [0, 1])
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