Quantum foundations for quantum technologies in the International Year of Quantum (2025)
arXiv:2603.04630 · doi:10.1088/2058-9565/ae49bc
Abstract
From the very beginning, Quantum Mechanics has been accompanied by crucial foundational questions: the possibility of visualizing physical processes, the limits of measurement epitomized by the Heisenberg uncertainty principle, the existence of a deeper underlying reality with additional degrees of freedom, the role of measurements, and the status of locality. Long regarded as philosophical speculations, these issues were progressively reformulated into precise mathematical statements and ultimately subjected to experimental verification. The trajectory proved unpredictable: questions once dismissed as metaphysical gave rise to experimental platforms, which in turn matured into devices and technologies powering quantum computation, communication, and sensing. Yet this development is not unidirectional: advances in technology also feed back into foundations, enabling tests of principles that were previously out of reach, for example, whether quantum superposition persists at larger and larger scales and whether reality, gravity included, is fundamentally quantum. In this way, the dialogue between foundational inquiry and technological progress continues to shape both our theoretical understanding and the practical realization of quantum phenomena.
21 pages, LaTeX
References in corpus (47)
- Many-Body Physics with Ultracold Gases
- Cavity Optomechanics
- Surface codes: Towards practical large-scale quantum computation
- Quantum Simulation
- Quantum information with Rydberg atoms
- Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
- Device-independent security of quantum cryptography against collective attacks
- Topological quantum memory
- Significant-loophole-free test of Bell's theorem with entangled photons
- Improved Simulation of Stabilizer Circuits
- A quantum gas microscope - detecting single atoms in a Hubbard regime optical lattice
- Interfacing single photons and single quantum dots with photonic nanostructures
- A strong loophole-free test of local realism
- Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
- Models of Wave-function Collapse, Underlying Theories, and Experimental Tests
- Many-Body Physics with Individually-Controlled Rydberg Atoms
- Cavity-based quantum networks with single atoms and optical photons
- No Signalling and Quantum Key Distribution
- A Spin Entanglement Witness for Quantum Gravity
- Ultrasensitive Beam Deflection Measurement via Interferometric Weak Value Amplification
- Gravitationally-induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity
- Direct Measurement of the Quantum Wavefunction
- Colloquium: Understanding Quantum Weak Values: Basics and Applications
- Motional Quantum Ground State of a Levitated Nanoparticle from Room Temperature
- Noncommuting mixed states cannot be broadcast
- Quantum jumps of light recording the birth and death of a photon in a cavity
- Contextuality supplies the magic for quantum computation
- A Straightforward Introduction to Continuous Quantum Measurement
- Fully device independent quantum key distribution
- Testing the limits of quantum mechanical superpositions
- Observing single quantum trajectories of a superconducting qubit
- Real-time optimal quantum control of mechanical motion at room temperature
- Observation of quantum jumps in a superconducting artificial atom
- Colloquium: Quantum interference of clusters and molecules
- Quantum control of a nanoparticle optically levitated in cryogenic free space
- To catch and reverse a quantum jump mid-flight
- Technical advantages for weak value amplification: When less is more
- Quantum back-action of variable-strength measurement
- Contextuality in Measurement-based Quantum Computation
- Near-field interferometry of a free-falling nanoparticle from a point-like source
- Mapping the optimal route between two quantum states
- A classical channel model for gravitational decoherence
- Upper bounds on spontaneous wave-function collapse models using millikelvin-cooled nanocantilevers
- Present status and future challenges of non-interferometric tests of collapse models
- Improved noninterferometric test of collapse models using ultracold cantilevers
- An ultra-narrow line width levitated nano-oscillator for testing dissipative wavefunction collapse
- Ghirardi-Rimini-Weber model with massive flashes