X gate qiskit

Is there any way that I can self define a control gate in qiskit? I have define a new quantum gate qgand it will be applied to the "data" qubit if the "control" qubit is 1, x gate qiskit, and it will not be applied if the "control" qubit is 0. How can I implement this?

In this article, we are going to see how to apply NOT gate on a given input 0 or 1 using quantum gates, we have to convert 0 to 1 and 1 to 0. This can be done easily in classical computers, but how can we do this in quantum computers. We have to represent the input in qubits and then we apply the X representation of NOT gate in the quantum computer operation in that qubit after that return the resultant qubit. QISKIT is the package that sits between quantum algorithms from one side, and the physical quantum device from the other side. It translates the common programming languages like Python into quantum machine language.

X gate qiskit

In Qiskit, quantum programs are normally expressed with quantum circuits that contain quantum operations. Quantum circuits are represented by the QuantumCircuit class, and quantum operations are represented by subclasses of the class Instruction. A quantum circuit may be created by supplying an argument that indicates the number of desired quantum wires qubits for that circuit. This is often supplied as an integer:. Optionally, the number of desired classical wires bits may also be specified. The first argument refers to the number of quantum wires, and the second argument the number of classical wires:. The number of desired quantum and classical wires may also be expressed by supplying instances of QuantumRegister and ClassicalRegister as arguments to QuantumCircuit. The QuantumCircuit class contains a large number of methods and attributes. The purpose of many of its methods is to apply quantum operations to a quantum circuit. Most of its other methods and attributes either manipulate or report information about a quantum circuit. The variable qc refers to an instance of QuantumCircuit that contains at least four quantum wires. Applies S gate to qubit 3. Applies SX square root of X gate to qubit 2. Applies T gate to qubit 1. Applies rotation with 3 Euler angles to qubit 1.

Chapter 1. The copy method returns a copy of the original circuit.

.

Interested in learning how to program quantum computers? Bell states are the four states that can be created when two qubits are maximally entangled. The four states are represented as so:. Now we will go through each state and see how to implement it using quantum circuits. The first Bell state is incredibly easy to implement as it can be created using a two qubit circuit consisting of a Hadamard gate and CNOT gate found below:. This will entangle the two qubits such that the combined state becomes:. Now lets see how the circuit actually creates the first Bell state.

X gate qiskit

In Qiskit, quantum programs are normally expressed with quantum circuits that contain quantum operations. Quantum circuits are represented by the QuantumCircuit class, and quantum operations are represented by subclasses of the class Instruction. A quantum circuit may be created by supplying an argument that indicates the number of desired quantum wires qubits for that circuit. This is often supplied as an integer:. Optionally, the number of desired classical wires bits may also be specified. The first argument refers to the number of quantum wires, and the second argument the number of classical wires:.

John lennon wallpaper iphone

This is often supplied as an integer:. Using the initialize method The initialize method initializes qubits of a quantum circuit to a given state and is not a unitary operation. Applies I gate to qubit 2. Creating a Parameter Instance The Parameter class is used to represent a parameter in a quantum circuit. Applies T gate to qubit 1. Notice that the measure method appended the requested measurement operations to the circuit. Additional Information. Current difficulty :. Interview Experiences. Toffoli gate with a control qubit and an anticontrol qubit. Qiskit transpiles the gates into those implemented on the target platform, combining gates where possible to optimize the circuit.

.

Example circuit resulting from the append method. RZ qc. Applies the Z gate to quantum wire 2, subject to the state of the control qubit on wire 1. Example circuit using the measure method. Applies the SX square root of X gate to quantum wire 1, subject to the state of the control qubit on wire 0. Like Article Like. I don't know if you may have already solved this problem already but I think the closest tool Qiskit provides to do what you are asking is the ControlledGate Class. Skip to main content. I notice you have two qubits in your data register, so just to be thorough I've provided an example below with a two qubit controlled, two target qubit gate based:. By defining a QuantumRegister consisting of three qubits, methods such as h , barrier , and measure may be applied to all three wires by passing a QuantumRegister reference.