Macroscopic Schrödinger-cat states of nonequilibrium electrons induced by cat-state optical driving and projective measurements on the light field
arXiv:2508.11769 · doi:10.1103/kzr9-fxx3
Abstract
We show that projective measurements on quantum light can induce macroscopic cat states in many-electron systems driven by such light. Here we investigate the quantum dynamics of independent two-level electrons interacting with Schrödinger-cat or -kitten states of light. Without measurement, a macroscopic cat state of the electrons appears only in an ultrashort time window. In contrast, we demonstrate that photon-number parity or quadrature projective measurements can restore a macroscopic cat state in nonequilibrium electrons, even in the thermodynamic limit. These dynamics are captured by an external-field approximation, in which the electronic system evolves into a Rabi-oscillation cat state. Our results highlight the need for precise quantum measurement techniques for light to control macroscopic quantum states of matter driven by quantum light.
17 pages, 11 figures
References in corpus (32)
- Finite-Time Disentanglement via Spontaneous Emission
- Photovoltaic Hall effect in graphene
- Sudden Death of Entanglement
- Delayed (sudden) birth of entanglement
- Generation of optical Schrödinger cat states in intense laser-matter interactions
- High harmonic generation driven by quantum light
- Measures of macroscopicity for quantum spin systems
- Ultrafast control of Rabi oscillations in a polariton condensate
- Quantum electrodynamics of intense laser-matter interactions: A tool for quantum state engineering
- Photon-statistics force in ultrafast electron dynamics
- Metrological Detection of Multipartite Entanglement from Young Diagrams
- 100 Gbps Integrated Quantum Random Number Generator Based on Vacuum Fluctuations
- High photon number entangled states and coherent state superposition from the extreme-ultraviolet to the far infrared
- High Harmonic Generation by Bright Squeezed Vacuum
- Light emission from strongly driven many-body systems
- Strong laser physics, non-classical light states and quantum information science
- Strong laser fields and their power to generate controllable high-photon-number coherent-state superpositions
- A long-lived solid-state optical quantum memory for high-rate quantum repeaters
- Operational formulation of homodyne detection
- Quantum phenomena in attosecond science
- Theory of entanglement and measurement in high harmonic generation
- Wigner negativity in spin- systems
- Witnessing Light-Driven Entanglement using Time-Resolved Resonant Inelastic X-Ray Scattering
- Towards quantum state tomography of a single polariton state of an atomic ensemble
- Noise excess free record/upload of non-classical states to continuous-variable quantum memory
- High-Harmonic Generation in a Crystal Driven by Quantum Light
- A Quantum Theory of Temporally Mismatched Homodyne Measurements with Applications to Optical Frequency Comb Metrology
- Nonlinear optics using intense optical coherent state superpositions
- Atomic quantum superposition state generation via optical probing
- Exploring Supersymmetry: Interchangeability Between Jaynes-Cummings and Anti-Jaynes-Cummings Models
- Quantum state engineering of light using intensity measurements and post-selection
- A note on the emission spectrum and trapping states in the Jaynes-Cummings model