Gabriele Cosmo
135 lines
5.3 KiB
C++
135 lines
5.3 KiB
C++
//
|
|
// ********************************************************************
|
|
// * License and Disclaimer *
|
|
// * *
|
|
// * The Geant4 software is copyright of the Copyright Holders of *
|
|
// * the Geant4 Collaboration. It is provided under the terms and *
|
|
// * conditions of the Geant4 Software License, included in the file *
|
|
// * LICENSE and available at http://cern.ch/geant4/license . These *
|
|
// * include a list of copyright holders. *
|
|
// * *
|
|
// * Neither the authors of this software system, nor their employing *
|
|
// * institutes,nor the agencies providing financial support for this *
|
|
// * work make any representation or warranty, express or implied, *
|
|
// * regarding this software system or assume any liability for its *
|
|
// * use. Please see the license in the file LICENSE and URL above *
|
|
// * for the full disclaimer and the limitation of liability. *
|
|
// * *
|
|
// * This code implementation is the result of the scientific and *
|
|
// * technical work of the GEANT4 collaboration. *
|
|
// * By using, copying, modifying or distributing the software (or *
|
|
// * any work based on the software) you agree to acknowledge its *
|
|
// * use in resulting scientific publications, and indicate your *
|
|
// * acceptance of all terms of the Geant4 Software license. *
|
|
// ********************************************************************
|
|
//
|
|
//
|
|
//
|
|
// --------------------------------------------------------------------
|
|
// GEANT4 class header file
|
|
//
|
|
// Class Description:
|
|
// Base class for a clipboard for communicating between quantum entangled tracks.
|
|
//
|
|
// ------------------ G4VEntanglementClipBoard ------------------
|
|
//
|
|
// Author: J.Allison, May 2017
|
|
//
|
|
// --------------------------------------------------------------------
|
|
|
|
// Usage:
|
|
//
|
|
// In the method that generates entangled secondaries
|
|
// (See, for example, G4eplusAnnihilation::AtRestDoIt)
|
|
// Make a shared pointer to a clip board and attach it to the tracks through
|
|
// G4EntanglementAuxInfo. That way the clip board lasts the life of both tracks.
|
|
// (G4XXXEntanglementClipBoard is your class inherited from this class)
|
|
// (See, for example, G4eplusAnnihilationEntanglementClipBoard)
|
|
// auto clipBoard = std::make_shared<G4XXXEntanglementClipBoard>();
|
|
// For each secondary
|
|
// G4Track* track = new G4Track(...
|
|
// ...
|
|
// clipBoard->SetTrackA(track);
|
|
// track->SetAuxiliaryTrackInformation(0,new G4EntanglementAuxInfo(clipBoard));
|
|
// Then repeat for track B
|
|
//
|
|
// In the method that does the quantum "measurement"
|
|
// (See, for example, G4LivermorePolarizedComptonModel::SampleSecondaries)
|
|
// const auto* auxInfo = fParticleChange->GetCurrentTrack()->GetAuxiliaryTrackInformation(0);
|
|
// if (auxInfo) {
|
|
// const auto* entanglementAuxInfo = dynamic_cast<const G4EntanglementAuxInfo*>(auxInfo);
|
|
// if (entanglementAuxInfo) {
|
|
// auto* clipBoard = dynamic_cast<G4XXXEntanglementClipBoard*>
|
|
// (entanglementAuxInfo->GetEntanglementClipBoard());
|
|
// if (clipBoard) {
|
|
// if (clipBoard->IsTrack1Measurement()) {
|
|
// if (clipBoard->GetTrackB() == fParticleChange->GetCurrentTrack()) {
|
|
// clipBoard->ResetTrack1Measurement();
|
|
// // Store information
|
|
// ...
|
|
// }
|
|
// } else if (clipBoard->IsTrack2Measurement()) {
|
|
// if (clipBoard->GetTrackA() == fParticleChange->GetCurrentTrack()) {
|
|
// clipBoard->ResetTrack2Measurement();
|
|
// // Retrieve information and apply quantum mechanics
|
|
// ...
|
|
// }
|
|
// }
|
|
// }
|
|
// }
|
|
// }
|
|
|
|
#ifndef G4VEntanglementClipBoard_hh
|
|
#define G4VEntanglementClipBoard_hh
|
|
|
|
#include "globals.hh"
|
|
|
|
class G4ParticleDefinition;
|
|
class G4Track;
|
|
|
|
class G4VEntanglementClipBoard {
|
|
|
|
public:
|
|
|
|
G4VEntanglementClipBoard()
|
|
: fpParentParticleDefinition(0)
|
|
, fTrackA(0)
|
|
, fTrackB(0)
|
|
, fTrack1Measurement(true)
|
|
, fTrack2Measurement(true)
|
|
{}
|
|
virtual ~G4VEntanglementClipBoard() {}
|
|
|
|
void SetParentParticleDefinition(G4ParticleDefinition* p)
|
|
{fpParentParticleDefinition = p;}
|
|
G4ParticleDefinition* GetParentParticleDefinition() const
|
|
{return fpParentParticleDefinition;}
|
|
|
|
void SetTrackA(const G4Track* track) {fTrackA = track;}
|
|
void SetTrackB(const G4Track* track) {fTrackB = track;}
|
|
const G4Track* GetTrackA() const {return fTrackA;}
|
|
const G4Track* GetTrackB() const {return fTrackB;}
|
|
|
|
// The entanglement-sensitive process is responsible for setting this.
|
|
void ResetTrack1Measurement() {fTrack1Measurement = false;}
|
|
void ResetTrack2Measurement() {fTrack2Measurement = false;}
|
|
G4bool IsTrack1Measurement() const {return fTrack1Measurement;}
|
|
G4bool IsTrack2Measurement() const {return fTrack2Measurement;}
|
|
|
|
private:
|
|
|
|
G4ParticleDefinition* fpParentParticleDefinition;
|
|
|
|
// Use pointer values to identify tracks. We don't know in which order the
|
|
// tracks will be processed so let us call them A & B.
|
|
const G4Track* fTrackA;
|
|
const G4Track* fTrackB;
|
|
|
|
// False until first measurement...
|
|
G4bool fTrack1Measurement; // ...of the first encountered track
|
|
G4bool fTrack2Measurement; // ...of the second encountered track
|
|
|
|
};
|
|
|
|
#endif
|