Qiskit with Java

Quantum computing with Qiskit services.

Configuration

The configuration is in src/test/resources/reference.conf. A sample is provided.

Switch between qx and qc by setting the ENVIRONMENT variable. The default is qx.

The API token has to be provided.

qx {
    // will be used where ENVIRONMENT="qx"
    url: "https://quantumexperience.ng.bluemix.net/api"
    loginPath: "/users/loginWithToken/"
    token: ""
    jobsPath: "/Jobs/"
    backend: "simulator"
  }

Example tests

Run QasmRunTest. A simple QASM script, as well as superdense coding and quantum teleportation are included as samples.

Example input:

OPENQASM 2.0;
include "qelib1.inc";
qreg q[5];
creg c[5];

h q[0];
measure q[0] -> c[0];

Example output:

{
  "deleted": false,
  "backend": {
    "name": "simulator"
  },
  "id": "d32a724abd57b4d42641511bf740416f",
  "shots": 128,
  "usedCredits": 0,
  "creationDate": "2018-03-31T15:22:25.162Z",
  "userId": "2cddbe2751b3161f6a8f33abd15b5b95",
  "calibration": {},
  "maxCredits": 3,
  "qasms": [
    {
      "result": {
        "date": "2018-03-31T15:22:25.431Z",
        "data": {
          "creg_labels": "c[5]",
          "counts": {
            "00000": 76,
            "00001": 52
          },
          "additionalData": {
            "seed": 653237722
          },
          "time": 0.00155116
        }
      },
      "executionId": "3c1502788a4d24391860c2396ec22066",
      "qasm": "include \"qelib1.inc\";qreg q[5];creg c[5];h q[0];measure q[0] -> c[0];",
      "status": "DONE"
    }
  ],
  "status": "COMPLETED"
}

Charts

Simulator

A local simulator is also provided. SuperdenseCodingTest gives a usage example:

int input = 125;

int bits = SuperdenseCoding.getBitsNeeded(input);
Circuit circuit = SuperdenseCoding.entangle(bits);    
circuit = SuperdenseCoding.encode(input, circuit);
int result = SuperdenseCoding.decode(circuit).measureAll();

Output:

22:29:33.292 [main] INFO  l.simulator.circuit.SuperdenseCoding - Encoding Number: 125
22:29:33.302 [main] INFO  l.simulator.circuit.SuperdenseCoding - Start State: |00000000>
 |
 v
22:29:33.302 [main] INFO  l.simulator.circuit.SuperdenseCoding - Progress -- 0/4
22:29:34.712 [main] INFO  l.simulator.circuit.SuperdenseCoding - IN: 125
22:29:34.970 [main] INFO  l.simulator.circuit.SuperdenseCoding - Progress -- 1/4
22:29:34.970 [main] INFO  l.simulator.circuit.SuperdenseCoding - IN: 31
22:29:35.414 [main] INFO  l.simulator.circuit.SuperdenseCoding - Progress -- 2/4
22:29:35.414 [main] INFO  l.simulator.circuit.SuperdenseCoding - IN: 7
22:29:35.802 [main] INFO  l.simulator.circuit.SuperdenseCoding - Progress -- 3/4
22:29:35.802 [main] INFO  l.simulator.circuit.SuperdenseCoding - IN: 1
22:29:35.965 [main] INFO  l.simulator.circuit.SuperdenseCoding - Progress -- 4/4
22:29:35.968 [main] INFO  l.simulator.circuit.SuperdenseCoding - 
 |
 v
22:29:35.968 [main] INFO  l.simulator.circuit.SuperdenseCoding - Final State: |01111101>
22:29:35.968 [main] INFO  l.t.simulator.SuperdenseCodingTest - Decoded number: 125

Credits

https://github.com/Zaba505/qiskit-sdk-java

https://github.com/paltaie/akka-spring-head2head

https://github.com/RoboNeo9/Java-Quantum-Computer-Simulator