Related Experiment Video
Updated: May 9, 2025
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
14.4K
Quantum coordinates, localisation of events, and the quantum hole argument
Viktoria Kabel1,2, Anne-Catherine de la Hamette1,2, Luca Apadula1,2
1Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences, Boltzmanngasse 3, A-1090 Vienna, Austria.
Communications Physics
|May 2, 2025
Summary
Quantum reference frames (QRFs) show that superposition and entanglement are not absolute but depend on the chosen frame. This research explores frame-dependent locations and their impact on causality and locality.
Area of Science:
- Quantum physics
- Foundations of physics
- Quantum information theory
Background:
- Classical reference frames are fundamental in physics.
- Quantum Reference Frames (QRFs) incorporate quantum properties of frames.
- Existing frameworks often treat reference frames classically.
Purpose of the Study:
- To investigate how quantum reference frames (QRFs) affect notions of superposition and entanglement.
- To explore the relational definition of physical quantities in the context of QRFs.
- To analyze the frame-dependence of spacetime localization and its implications.
Main Methods:
- Examining configuration identification across superposed branches.
- Utilizing symmetries to analyze sameness and difference across branches.
- Applying QRF concepts to semi-classical spacetimes in superposition.
- Constructing comparison maps using scalar field coincidences.
Main Results:
- Superposition and entanglement lose their absolute meaning in QRFs.
- The identification of configurations across branches is QRF-dependent.
- Event localization in semi-classical spacetimes is frame-dependent.
- A generalization of Einstein's hole argument to the quantum context is presented.
Conclusions:
- The choice of QRF fundamentally alters the interpretation of quantum states.
- Frame-dependent localization has significant implications for causal order and locality.
- This work provides a new perspective on the relational nature of physical properties.
Related Concept Videos
02:45The Quantum-Mechanical Model of an Atom
41.5K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing...
41.5K
02:43Quantum Numbers
34.0K
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
34.0K
04:08The Uncertainty Principle
22.8K
Werner Heisenberg considered the limits of how accurately one can measure properties of an electron or other microscopic particles. He determined that there is a fundamental limit to how accurately one can measure both a particle’s position and its momentum simultaneously. The more accurate the measurement of the momentum of a particle is known, the less accurate the position at that time is known and vice versa. This is what is now called the Heisenberg uncertainty principle. He...
22.8K
02:32The de Broglie Wavelength
25.1K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
25.1K
03:06The Pauli Exclusion Principle
33.4K
The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
33.4K
02:28Electronic Structure of Atoms
20.7K
An atom comprises protons and neutrons, which are contained inside the dense, central core called the nucleus, with electrons present around the nucleus. Taking into account the wave–particle duality of electrons and the uncertainty in position around the nucleus, quantum mechanics provides a more accurate model for the atomic structure. It describes atomic orbitals as the regions around the nucleus where electrons of discrete energy exist, characterized by four quantum...
20.7K