Particle detectors as witnesses for quantum gravity

Faure, Rémi; Perche, T. Rick; Torres, Bruno de S. L.

doi:10.1103/physrevd.101.125018

Cited by 22 publications

(17 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, we note that there are experimental setups where the correlations acquired by qubits due to their interaction with a field is detrimental to the purposes of the experiment (see, e.g., [47]). In those cases, the sabotage of correlations between the two target qubits can be useful to shield the target quantum systems from spurious correlations that would introduce noise in the setup.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Sabotaging the harvesting of correlations from quantum fields

Sahu,

Melgarejo-Lermas,

Martín-Martínez

2021

Preprint

View full text Add to dashboard Cite

We study the non-perturbative harvesting of classical and quantum correlations between two parties coupled to a quantum field. First, we consider a scenario with an arbitrary number of two-level systems that couple to a quantum field locally in time. Then, we study the impact of the presence of additional detectors (interlopers) on the ability for two target detectors (Alice and Bob) to acquire correlations through their interaction with the field. We analyze the harvesting of different correlation measures in this non-perturbative regime and we demonstrate that even a single interloper can completely sabotage all correlation harvesting between Alice and Bob by acting on the causal past of one of them. Specifically, we show that the interloper is able to interact with the field so that the field itself 'floods' one of the parties with entropy. This prevents Alice and Bob from acquiring any correlations. Furthermore, we show that this kind of attack cannot be defended against.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Here we follow the approach in [39] to calculate the correlation function C(ρ). Recall that it is defined (47) as…”

Section: Henderson-vedral C Correlation Functionmentioning

confidence: 99%

Sabotaging the harvesting of correlations from quantum fields

Sahu,

Melgarejo-Lermas,

Martín-Martínez

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…These can be used not only to probe fundamental aspects of QFT, such as the Unruh effect and Hawking radiation [6][7][8][9][10][11][12], but also to probe the entanglement structure of the states associated with a quantum field [13][14][15][16][17]. On top of that, numerous physical systems can be well modelled by particle detectors, such as atoms interacting with light [15,18,19] or gravity [20], and nucleons that decay via the weak force [21].…”

Section: The Udw Modelmentioning

confidence: 99%

A path integral formulation for particle detectors: the Unruh-DeWitt model as a line defect

Burbano

Perche

Torres

2021

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

Particle detectors are an ubiquitous tool for probing quantum fields in the context of relativistic quantum information (RQI). We formulate the Unruh-DeWitt (UDW) particle detector model in terms of the path integral formalism. The formulation is able to recover the results of the model in general globally hyperbolic spacetimes and for arbitrary detector trajectories. Integrating out the detector’s degrees of freedom yields a line defect that allows one to express the transition probability in terms of Feynman diagrams. Inspired by the light-matter interaction, we propose a gauge invariant detector model whose associated line defect is related to the derivative of a Wilson line. This is another instance where nonlocal operators in gauge theories can be interpreted as physical probes for quantum fields.

show abstract

“…As a simple and useful tool, the UDW detector has also received considerable attention in many other areas, including the study of black hole thermodynamics [3,4], Lorentz-violating dispersion relations [5][6][7], finite spacial extensions of the detector and the corresponding regularization schemes [8][9][10][11][12], and the coupling to a fermionic field [13][14][15][16] (for more examples, see recent reviews [17][18][19] and references therein). More recently, UDW detectors have been used extensively in the so-called entanglement harvesting protocol [20], where a pair of UDW detectors coupled to a quantum field can be used to extract the vacuum entanglement of the field, and therefore to probe the nontrivial field properties in a wide range of scenarios [21][22][23][24][25][26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Unruh-DeWitt detector's response to a non-relativistic particle

2021

Preprint

View full text Add to dashboard Cite

Unruh-DeWitt (UDW) detector that couples locally to a quantum field is an important tool for operationally studying field properties. Here, we study the response of an inertial UDW detector to a non-relativistic particle state of a massive scalar field and we find that the transition probability of the detector splits into the vacuum contribution and the matter contribution. We show that the matter part oscillates with the interaction time duration and the oscillation period depends on the difference between the mass of the particle and the energy gap of the detector; a strong resonance pattern for the transition probability is found when such difference equals to zero. We compare the matter part contribution with the non-relativistic probability density of the particle and find that they provide qualitatively similar description of the particle.

show abstract

Particle detectors as witnesses for quantum gravity

Cited by 22 publications

References 19 publications

Sabotaging the harvesting of correlations from quantum fields

Sabotaging the harvesting of correlations from quantum fields

A path integral formulation for particle detectors: the Unruh-DeWitt model as a line defect

Unruh-DeWitt detector's response to a non-relativistic particle

Contact Info

Product

Resources

About