The Unruh effect, a fundamental prediction of quantum field theory, postulates that a uniformly accelerated observer perceives the vacuum as a thermal bath. Direct experimental verification remains a formidable challenge due to the minuscule magnitude of the effect under linear acceleration. We have previously proposed a tabletop experiment utilizing the circular motion of fluxon-antifluxon...
Analogue Hawking radiation from acoustic horizons is now a well-established phenomenon, both theoretically and experimentally. Its persistence, despite the modified dispersion relations characterizing phonons in analogue spacetimes, represents an evidence of the robustness of this effect against the ultraviolet non-relativistic modification of the particles' behavior. Previous theoretical...
Gravity simulators enable the study of black-hole quasinormal modes (QNMs) in controlled experimental settings. However, realistic laboratory setups introduce two key effects absent in traditional gravitational QNM analyses: dispersion and spatial confinement. The former introduces Lorentz-breaking terms in the wave equation, as encountered in modified gravity theories, whereas the latter...
Gravitational wave studies and detection efforts have traditionally focused on their effects on test masses and geodesic deviation. In contrast, we show that gravitational waves can nontrivially influence spontaneous emission from point-like atoms, inducing directionality in the emission pattern and generating sidebands in the spectrum. We examine how much information about the gravitational...
Experimental studies of information in continuous—variable quantum systems have thus far been highly limited due to the difficulty of accessing the full state of the system. Recently, novel reconstruction methods for Gaussian states — those fully characterised by mean and covariance — have been utilised, enabling the verification of the area-law scaling of mutual information in a...
In this talk, I will introduce a proposal for a quantum computing model that leverages a qubit's motion to suppress decoherence while enabling quantum gates. By treating the qubit as a moving Unruh-DeWitt detector interacting with a quantum field in a cavity, we use its trajectory to eliminate dominant decoherence channels—an effect known as acceleration-induced transparency. One-qubit gates...
Backaction plays a fundamental role in measurements made on quantum systems. In this talk I will discuss the role of backaction in quantum simulators on analogue spacetime, presenting both a non-perturbative treatment of backaction for an analogue realization of the circular Unruh effect and a general analogy incorporating perturbative backaction for Unruh-deWitt detectors in (2+1) dimensions....
Implementing RQI protocols such as entanglement harvesting in superconducting circuits requires moving beyond idealized UDW detector models. These implementations use superconducting qubits tunably coupled to transmission lines, which serve as one-dimensional quantum fields. We will present a series of upgrades to UDW detector models needed to capture such experimental implementations, and...
I review a number of theoretical results suggesting that gravitational (notably, cosmological) dynamics can be reproduced in the hydrodynamic regime of quantum many-body systems, and argue for a change in perspective (based on a relational understanding of spacetime physics and on these recent results) on what analogue simulations should strive for, to reproduce cosmology also in the lab. More...
In sonic models of relativity, observers outside the sonic medium perceive the violation of ordinary Lorentz symmetry, while agents measuring distances and durations using sound pulses within the medium don't. Surprisingly, these "sonic observers" will interpret the physics of ordinary particles (like photons) as violating their own sonic Lorentz symmetries. In previous work, we argued that...
We propose a special relativistic framework for quantum mechanics. It is based on introducing a Hilbert space for events. Events are taken as primitive notions (as customary in relativity), whereas quantum systems (e.g. fields and particles) are emergent in the form of joint probability amplitudes for position and time of events. Textbook relativistic quantum mechanics and quantum field theory...
We model relativistic equations of motion, i.e. the physics of first quantization, using a port-based teleportation protocol. The entanglement resource is found in a quantum field's vacuum, and the measurement needed for a teleportation protocol is found in the interaction between a piece of matter and the vacuum of a quantum field. In this way, we find an interesting mapping between...
