Observing the double slit experiment

In summary, in the experiment of wave particle duality, the concept of "observation" is better understood as "detection" which is the result of a measurement made by a detector coupled to the quantum system. The wavefunction is used to calculate the probability of obtaining this measurement result, and without observation, there is no wave function. The theory of quantum mechanics does not describe what the particle is doing before detection, and the particle is always detected as a particle. An observation is a measurement result that gives a value for a specified observable, and the particle detector serves as the observer in the experiment. The presence of a human observer is not necessary for the experiment to take place. The use of a conductive piece of material in and around the
  • #36
Here is a small but relevant part from the table of content in the monograph of Auletta:

9 The measurement problem in quantum mechanics 277 9.1 Statement of the problem 278 9.2 A brief history of the problem 284 9.3 Schrödinger cats 291 9.4 Decoherence 297 9.5 Reversibility/irreversibility 308 9.6 Interaction-free measurement 315 9.7 Delayed-choice experiments 320 9.8 Quantum Zeno effect 322 9.9 Conditional measurements or postselection 325 9.10 Positive operator valued measure 327 9.11 Quantum non-demolition measurements 335 9.12 Decision and estimation theory 341 Summary 349 Problems 351 Further reading 353

Part IV Quantum information: state and correlations 14 Quantum theory of open systems 513 14.1 General considerations 514 14.2 The master equation 516 14.3 A formal generalization 523 14.4 Quantum jumps and quantum trajectories 528 14.5 Quantum optics and Schrödinger cats 533 Summary 540 Problems 541 Further reading 542 15 State measurement in quantum mechanics 544 15.1 Protective measurement of the state 544 15.2 Quantum cloning and unitarity violation 548 15.3 Measurement and reversibility 550 15.4 Quantum state reconstruction 554 15.5 The nature of quantum states 564 Summary 565 Problems 565 Further reading 566 16 Entanglement: non-separability 567 16.1 EPR 568 16.2 Bohm’s version of the EPR state 573 16.3 HV theories 577 16.4 Bell’s contribution 582 16.5 Experimental tests 595 16.6 Bell inequalities with homodyne detection 605 16.7 Bell theorem without inequalities 613 16.8 What is quantum non-locality? 619 16.9 Further developments about inequalities 623 16.10 Conclusion 625 Summary 625 Problems 626 Further reading 627 17 Entanglement: quantum information and computation 628 17.1 Information and entropy 628 17.2 Entanglement and information 631 17.3 Measurement and information 639 17.4 Qubits 642 17.5 Teleportation 643 17.6 Quantum cryptography 646 17.7 Elements of quantum computation 650 17.8 Quantum algorithms and error correction 659 Summary 671
 

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