Quantum Systems under Gravitational Time Dilation

1. Front Matter

   Pages i-xiii

   PDF

2. Introduction

   • Magdalena Zych

   Pages 1-8

3. Classical Clocks in General Relativity

   • Magdalena Zych

   Pages 9-28

4. Quantum Clocks in General Relativity

   • Magdalena Zych

   Pages 29-35

5. Quantum Complementarity and Time Dilation

   • Magdalena Zych

   Pages 37-46

6. Interference of “Clocks”—Experimental Proposals

   • Magdalena Zych

   Pages 47-69

7. Decoherence from Time Dilation

   • Magdalena Zych

   Pages 71-79

8. Quantum Formulation of the Einstein Equivalence Principle

   • Magdalena Zych

   Pages 81-97

9. Clocks Beyond Classical Space-Time

   • Magdalena Zych

   Pages 99-114

10. Conclusions and Outlook

    • Magdalena Zych

    Pages 115-118

11. Back Matter

    Pages 119-139

    PDF

This thesis introduces a new theoretical tool to explore the notion of time and temporal order in quantum mechanics: the relativistic quantum "clock" framework. It proposes novel thought experiments showing that proper time can display quantum features, e.g. when a  “clock” runs different proper times in superposition. The resulting new physical effects can be tested in near-future laboratory experiments (with atoms, molecules and photons as "clocks"). The notion of time holds the key to the regime where quantum theory and general relativity overlap, which has not been directly tested yet and remains largely unexplored by the theory. The framework also applies to scenarios in which causal relations between events become non-classical and which were previously considered impossible to address without refuting quantum theory. The relativistic quantum "clock" framework offers new insights into the foundations of quantum theory and general relativity.  

• Quantum Clocks
• Time Dilation in Quantum Physics
• Gravitational Decoherence
• Quantum and Gravity Interplay
• Gravity Effects in Atom Interferometry
• Quantum Einstein Equivalence Principle
• Quantum Weak Equivalence Principle
• Quantum Causal Structures
• Superpositions of Time Order

• Centre for Engineered Quantum Systems, School of Mathematics and Physics, The University of Queensland , Brisbane, Australia

  Magdalena Zych

After graduating in Physics from the University of Łódź, Poland, Magdalena Zych joined the group of Časlav Brukner in Vienna -- first as an Erwin Schrödinger Junior Research Fellow, and then as a PhD student.  Inspired by  discussions with Vienna's frequent guests: Danny Greenberger ("G" of the GHZ) and Oxford philosopher Harvey Brown, she quickly shifted her research interest from entanglement in relativistic quantum fields to joint foundations of quantum theory and general relativity. Currently, she continues to pursue this fascinating research line in sunny Brisbane (Australia) as a Fellow of the University of Queensland.

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