Simulator.h

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#pragma once
 
#ifndef _SIMULATOR_INTERFACE_H_
#define _SIMULATOR_INTERFACE_H_
 
#include "State.h"
 
namespace Simulators {

class ISimulator : public IState, std::enable_shared_from_this<ISimulator> {
 public:
  // Native CUDA device, or -1 for CPU/uninitialized simulators.
  virtual int GetGpuDevice() const { return -1; }

  virtual void ApplyGenericOneQubitGate(Types::qubit_t qubit,
                                        const Eigen::Matrix2cd& gate) = 0;

  virtual void ApplyGenericTwoQubitGate(Types::qubit_t qubit0,
                                        Types::qubit_t qubit1,
                                        const Eigen::Matrix4cd& gate) = 0;

  virtual void ApplyP(Types::qubit_t qubit, double lambda) = 0;

  virtual void ApplyX(Types::qubit_t qubit) = 0;

  virtual void ApplyY(Types::qubit_t qubit) = 0;

  virtual void ApplyZ(Types::qubit_t qubit) = 0;

  virtual void ApplyH(Types::qubit_t qubit) = 0;

  virtual void ApplyS(Types::qubit_t qubit) = 0;

  virtual void ApplySDG(Types::qubit_t qubit) = 0;

  virtual void ApplyT(Types::qubit_t qubit) = 0;

  virtual void ApplyTDG(Types::qubit_t qubit) = 0;

  virtual void ApplySx(Types::qubit_t qubit) = 0;

  virtual void ApplySxDAG(Types::qubit_t qubit) = 0;

  virtual void ApplyK(Types::qubit_t qubit) = 0;

  virtual void ApplyRx(Types::qubit_t qubit, double theta) = 0;

  virtual void ApplyRy(Types::qubit_t qubit, double theta) = 0;

  virtual void ApplyRz(Types::qubit_t qubit, double theta) = 0;

  virtual void ApplyU(Types::qubit_t qubit, double theta, double phi,
                      double lambda, double gamma) = 0;

  virtual void ApplyCX(Types::qubit_t ctrl_qubit, Types::qubit_t tgt_qubit) = 0;

  virtual void ApplyCY(Types::qubit_t ctrl_qubit, Types::qubit_t tgt_qubit) = 0;

  virtual void ApplyCZ(Types::qubit_t ctrl_qubit, Types::qubit_t tgt_qubit) = 0;

  virtual void ApplyCP(Types::qubit_t ctrl_qubit, Types::qubit_t tgt_qubit,
                       double lambda) = 0;

  virtual void ApplyCRx(Types::qubit_t ctrl_qubit, Types::qubit_t tgt_qubit,
                        double theta) = 0;

  virtual void ApplyCRy(Types::qubit_t ctrl_qubit, Types::qubit_t tgt_qubit,
                        double theta) = 0;

  virtual void ApplyCRz(Types::qubit_t ctrl_qubit, Types::qubit_t tgt_qubit,
                        double theta) = 0;

  virtual void ApplyCH(Types::qubit_t ctrl_qubit, Types::qubit_t tgt_qubit) = 0;

  virtual void ApplyCSx(Types::qubit_t ctrl_qubit,
                        Types::qubit_t tgt_qubit) = 0;

  virtual void ApplyCSxDAG(Types::qubit_t ctrl_qubit,
                           Types::qubit_t tgt_qubit) = 0;

  virtual void ApplySwap(Types::qubit_t qubit0, Types::qubit_t qubit1) = 0;

  virtual void ApplyCCX(Types::qubit_t qubit0, Types::qubit_t qubit1,
                        Types::qubit_t qubit2) = 0;

  virtual void ApplyCSwap(Types::qubit_t ctrl_qubit, Types::qubit_t qubit0,
                          Types::qubit_t qubit1) = 0;

  virtual void ApplyCU(Types::qubit_t ctrl_qubit, Types::qubit_t tgt_qubit,
                       double theta, double phi, double lambda,
                       double gamma) = 0;

  virtual void ApplyNop() = 0;

  void InitializeToBasisState(size_t num_qubits,
                              Types::qubit_t basisState) override {
    if (num_qubits == 0) return;
    Clear();
    AllocateQubits(num_qubits);
    Initialize();
    for (size_t q = 0; q < num_qubits; ++q)
      if ((basisState >> q) & 1ULL) ApplyX(static_cast<Types::qubit_t>(q));
  }

  void InitializeToBasisState(size_t num_qubits,
                              const std::vector<bool> &basisState) override {
    if (num_qubits == 0) return;
    Clear();
    AllocateQubits(num_qubits);
    Initialize();
    for (size_t q = 0; q < num_qubits && q < basisState.size(); ++q)
      if (basisState[q]) ApplyX(static_cast<Types::qubit_t>(q));
  }

  virtual std::unique_ptr<ISimulator> Clone() = 0;

  std::shared_ptr<ISimulator> getptr() { return shared_from_this(); }
};
}  // namespace Simulators
 
#endif  // !_SIMULATOR_INTERFACE_H_