Physics within a quantum reference frame

Abstract

We investigate the physics of quantum reference frames. Specifically, we study several simple scenarios involving a small number of quantum particles, whereby we promote one of these particles to the role of a quantum observer and ask what is the description of the rest of the system, as seen by this observer? We highlight the interesting aspects of such questions by presenting a number of apparent paradoxes. By unravelling these paradoxes we get a better understanding of the physics of quantum reference frames.

11 pages, 4 figures. v2: Published version

References in corpus (8)

• Reference frames, superselection rules, and quantum information
• The resource theory of quantum reference frames: manipulations and monotones
• Measuring the quality of a quantum reference frame: the relative entropy of frameness
• Quantum communication using a bounded-size quantum reference frame
• Nonclassical correlations from randomly chosen local measurements
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• Switching quantum reference frames in the N-body problem and the absence of global relational perspectives
• Edge modes as reference frames and boundary actions from post-selection
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• Information-reality complementarity: The role of measurements and quantum reference frames
• Trajectories without quantum uncertainties
• Relativity of Quantum States and Observables
• Quantum reference frames associated with non-compact groups: the case of translations and boosts, and the role of mass
• Reexamination of Pure Qubit Work Extraction
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• Kinematics and dynamics in noninertial quantum frames of reference
• Optimal Universal Quantum Error Correction via Bounded Reference Frames
• Galilei covariance and Einstein's equivalence principle in quantum reference frames
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• Nonlocality, quantum correlations, and violations of classical realism in the dynamics of two noninteracting quantum walkers
• Second-quantized Unruh-DeWitt detectors and their quantum reference frame transformations
• Non-inertial quantum clock frames lead to non-Hermitian dynamics
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• Switching Quantum Reference Frames for Quantum Measurement
• Quantum reference frames for an indefinite metric
• Testing quantum theory with thought experiments
• Quantum resource covariance
• Coherence and realism in the Aharonov-Bohm effect
• Flow of time during energy measurements and the resulting time-energy uncertainty relations
• Entanglement-asymmetry correspondence for internal quantum reference frames
• Inference of gravitational field superposition from quantum measurements
• Sharing nonfungible information requires shared nonfungible information
• A model of quantum spacetime
• Gravitational entropy is observer-dependent
• Mesoscopic Mechanical Resonators as Quantum Non-Inertial Reference Frames
• Quantum Reference Frames for Lorentz Symmetry
• Quantum conformal symmetries for spacetimes in superposition
• The Cosmological Constant Problem and Quantum Spacetime Reference Frame
• Generalised second law beyond the semiclassical regime
• Crossed products and quantum reference frames: on the observer-dependence of gravitational entropy
• Nonrelativistic spatiotemporal quantum reference frames
• Aharonov-Bohm effect with an effective complex-valued vector potential
• A Statistical Fields Theory underlying the Thermodynamics of Ricci Flow and Gravity
• Universality of quantum time dilation
• Quantum tunneling of composite object coupled with quantized radiation field
• Quantum Mechanics from Relational Properties, Part III: Path Integral Implementation
• The decoherence and interference of cosmological arrows of time for a de Sitter universe with quantum fluctuations
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• Quantum Gravity, Hydrodynamics and Emergent Cosmology: A Collection of Perspectives
• The Ricci Flow and the Early Universe
• Time Contraction Within Lightweight Reference Frames
• What can we do in a symmetry-constrained perspective? The importance of the total charge's status in quantum reference frame frameworks
• Quantum Galilei group as quantum reference frame transformations
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• Gravitational null rays: Covariant Quantization and the Dressing Time
• Quantum reference frames: derivation of perspective-dependent descriptions via a perspective-neutral structure
• Considering a superposition of classical reference frames
• Energy Cost of Localization of Relational Quantum Information