Realizing an Unruh-DeWitt detector through electro-optic sampling of the electromagnetic vacuum
arXiv:2103.14360 · doi:10.1103/PhysRevD.105.056023
Abstract
A new theoretical framework to describe the experimental advances in electro-optic detection of broadband quantum states, specifically the quantum vacuum, is devised. By making use of fundamental concepts from quantum field theory on spacetime metrics, the nonlinear interaction behind the electro-optic effect can be reformulated in terms of an Unruh-DeWitt detector coupled to a conjugate field during a very short time interval. When the coupling lasts for a time interval comparable to the oscillation periods of the detected field mode (i.e. the subcycle regime), virtual particles inhabiting the field vacuum are transferred to the detector in the form of real excitations. We demonstrate that this behavior can be rigorously translated to the scenario of electro-optic sampling of the quantum vacuum, in which the (spectrally filtered) probe works as an Unruh-DeWitt detector, with its interaction-generated photons arising from virtual particles inhabiting the electromagnetic vacuum. We discuss the specific working regime of such processes, and the consequences through characterization of the quantum light involved in the detection.
References in corpus (25)
- Gaussian Quantum Information
- Coupling Superconducting Qubits via a Cavity Bus
- Observation of the Dynamical Casimir Effect in a Superconducting Circuit
- Continuous variable quantum information: Gaussian states and beyond
- Quantum vacuum properties of the intersubband cavity polariton field
- Nonlinear optical signals and spectroscopy with quantum light
- Entanglement from the vacuum
- DeSitter entropy, quantum entanglement and ADS/CFT
- Considerations on the Unruh Effect: Causality and Regularization
- Theory of quantum frequency conversion and type-II parametric down-conversion in the high-gain regime
- Electric field correlation measurements on the electromagnetic vacuum state
- Spectral structure and decompositions of optical states, and their applications
- Diamonds's Temperature: Unruh effect for bounded trajectories and thermal time hypothesis
- Entanglement in curved spacetimes and cosmology
- Effects of time ordering in quantum nonlinear optics
- Interferometric Unruh detectors for Bose-Einstein condensates
- Brief History of Quantum Cryptography: A Personal Perspective
- Paraxial Theory of Direct Electro-Optic Sampling of the Quantum Vacuum
- Entangled photons from the polariton vacuum in a switchable optical cavity
- Subcycle squeezing of light from a time flow perspective
- Bloch-Messiah decomposition and Magnus expansion for parametric down-conversion with monochromatic pump
- Spectra of ultrabroadband squeezed pulses and the finite-time Unruh-Davies effect
- Quantum simulation of Unruh-DeWitt detectors with nonlinear optics
- Decoherence of the radiation from an accelerated quantum source
- Universal Transformation of Displacement Operators and its Application to Homodyne Tomography In Differing Relativistic Reference Frames
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- Electro-optic sampling of the electric-field operator for ultrabroadband pulses of Gaussian quantum light
- Subcycle tomography of quantum light