Equivalence of approaches to relational quantum dynamics in relativistic settings
We have previously shown that three approaches to relational quantum dynamics—
relational Dirac observables, the Page-Wootters formalism and quantum deparametrizations …
relational Dirac observables, the Page-Wootters formalism and quantum deparametrizations …
Quantum clocks observe classical and quantum time dilation
At the intersection of quantum theory and relativity lies the possibility of a clock experiencing
a superposition of proper times. We consider quantum clocks constructed from the internal …
a superposition of proper times. We consider quantum clocks constructed from the internal …
Spacetime Quantum Reference Frames and superpositions of proper times
F Giacomini - Quantum, 2021 - quantum-journal.org
In general relativity, the description of spacetime relies on idealised rods and clocks, which
identify a reference frame. In any concrete scenario, reference frames are associated to …
identify a reference frame. In any concrete scenario, reference frames are associated to …
Second-quantized Unruh-DeWitt detectors and their quantum reference frame transformations
F Giacomini, A Kempf - Physical Review D, 2022 - APS
We generalize the Unruh-DeWitt detector model to second quantization. We illustrate this
model by applying it to an excited particle in a superposition of relativistic velocities. We …
model by applying it to an excited particle in a superposition of relativistic velocities. We …
Quantum reference frame transformations as symmetries and the paradox of the third particle
In a quantum world, reference frames are ultimately quantum systems too–but what does it
mean to" jump into the perspective of a quantum particle"? In this work, we show that …
mean to" jump into the perspective of a quantum particle"? In this work, we show that …
Gravitational time dilation as a resource in quantum sensing
Atomic clock interferometers are a valuable tool to test the interface between quantum theory
and gravity, in particular via the measurement of gravitational time dilation in the quantum …
and gravity, in particular via the measurement of gravitational time dilation in the quantum …
Quantized mass-energy effects in an Unruh-DeWitt detector
A simple but powerful particle detector model consists of a two-level system coupled to a
field, where the detected particles are the field excitations. This is known as the Unruh …
field, where the detected particles are the field excitations. This is known as the Unruh …
Quantum reference frames for lorentz symmetry
L Apadula, E Castro-Ruiz, Č Brukner - Quantum, 2024 - quantum-journal.org
Since their first introduction, Quantum Reference Frame (QRF) transformations have been
extensively discussed, generalising the covariance of physical laws to the quantum domain …
extensively discussed, generalising the covariance of physical laws to the quantum domain …
Hawking radiation for detectors in superposition of locations outside a black hole
J Paczos, LC Barbado - Physical Review D, 2023 - APS
Hawking radiation is the proposed thermal black-body radiation of quantum nature emitted
from a black hole. One common way to give an account of Hawking radiation is to consider a …
from a black hole. One common way to give an account of Hawking radiation is to consider a …
Quantum time dilation in a gravitational field
According to relativity, the reading of an ideal clock is interpreted as the elapsed proper time
along its classical trajectory through spacetime. In contrast, quantum theory allows the …
along its classical trajectory through spacetime. In contrast, quantum theory allows the …