67 citations · 422 across the 19 of their papers we have counts for
20 papers
Solving approximate hidden subgroup problems: quantum heuristics to detect weak entanglement
Petar Simidzija, Eugene Koskin, Elton Yechao Zhu +2
How can we use a quantum computer to detect the entanglement structure of a quantum state? Bouland et al. (2024) recently provided an algorithm that, given multiple input copies of…
Bubbles of cosmology in AdS/CFT
Abhisek Sahu, Petar Simidzija, Mark Van Raamsdonk
Gravitational effective theories associated with holographic CFTs have cosmological solutions, which are typically big-bang / big-crunch cosmologies. These solutions are not asympt…
Accelerating cosmology from gravitational effective field theory
Stefano Antonini, Petar Simidzija, Brian Swingle +2
A large class of cosmologies have big-bang / big crunch spacetimes with time-symmetric backgrounds and asymptotically AdS Euclidean continuations suggesting a possible holog…
Covariant Predictions for Planck-Scale Features in Primordial Power Spectra
Aidan Chatwin-Davies, Achim Kempf, Petar Simidzija
In this companion to our letter (arXiv:2208.10514), we elaborate the full details of the predicted corrections to the primordial scalar and tensor power spectra that arise from qua…
Predictions for Quantum Gravitational Signatures from Inflation
Aidan Chatwin-Davies, Achim Kempf, Petar Simidzija
We compute the corrections to the primordial power spectrum that should arise in realistic inflationary scenarios if there exists a generic covariant ultraviolet (UV) cutoff, as co…
Can one hear the shape of a wormhole?
Stefano Antonini, Petar Simidzija, Brian Swingle +1
A large class of flat big bang - big crunch cosmologies with negative cosmological constant are related by analytic continuation to asymptotically AdS traversable wormholes with pl…
Accelerating cosmology from a holographic wormhole
Stefano Antonini, Petar Simidzija, Brian Swingle +1
We consider cosmological models in which the cosmology is related via analytic continuation to a Euclidean asymptotically AdS planar wormhole geometry defined holographically via a…
Cosmology from the vacuum
Stefano Antonini, Petar Simidzija, Brian Swingle +1
We argue that standard tools of holography can be used to describe fully non-perturbative microscopic models of cosmology in which a period of accelerated expansion may result from…
Looking for (and not finding) a bulk brane
Wyatt Reeves, Moshe Rozali, Petar Simidzija +3
When does a holographic CFT with a boundary added to it (a BCFT) also have a `good' holographic dual with a localized gravitating end-of-the-world brane? We argue that the answer t…
Negative energy enhancement in layered holographic conformal field theories
Alex May, Petar Simidzija, Mark Van Raamsdonk
Using a holographic model, we study quantum field theories with a layer of one CFT surrounded by another CFT, on either a periodic or an infinite direction. We study the vacuum ene…
Holo-ween
Petar Simidzija, Mark Van Raamsdonk
We argue that given holographic CFT in some state with a dual spacetime geometry M, and given some other holographic CFT, we can find states of CFT whose dual geometrie…
Learning to Utilize Correlated Auxiliary Noise: A Possible Quantum Advantage
Aida Ahmadzadegan, Petar Simidzija, Ming Li +1
This paper has two messages. First, we demonstrate that neural networks that process noisy data can learn to exploit, when available, access to auxiliary noise that is correlated w…
Superadditivity of channel capacity through quantum fields
Koji Yamaguchi, Aida Ahmadzadegan, Petar Simidzija +2
Given that any communication is communication through quantum fields, we here study the scenario where a sender, Alice, causes information-carrying disturbances in a quantum field.…
Transmission of quantum information through quantum fields
Petar Simidzija, Aida Ahmadzadegan, Achim Kempf +1
We investigate the quantum channel consisting of two localized quantum systems that communicate through a scalar quantum field. We choose a scalar field rather than a tensor or vec…
Gravitational wave emission from the CMB and other thermal fields
Petar Simidzija, Achim Kempf, Eduardo Martin-Martinez
We calculate the gravitational wave power density emitted by quantum thermal sources. As particular cases, we calculate the emission of gravitational waves from the cosmic microwav…
Harvesting correlations from thermal and squeezed coherent states
Petar Simidzija, Eduardo Martin-Martinez
We study the harvesting of entanglement and mutual information by Unruh-DeWitt particle detectors from thermal and squeezed coherent field states. We prove (for arbitrary spatial d…
General no-go theorem for entanglement extraction
Petar Simidzija, Robert H. Jonsson, Eduardo Martin-Martinez
We study under what circumstances a separable bipartite system A-B can or cannot become entangled through local interactions with a bi-local entangled source -$\text{S}…
Non-perturbative analysis of entanglement harvesting from coherent field states
Petar Simidzija, Eduardo Martin-Martinez
We study (non-perturbatively) the interactions of delta-coupled detectors with coherent states of a scalar field. We show that the time-evolved density matrix spectra of i) a singl…
All coherent field states entangle equally
Petar Simidzija, Eduardo Martin-Martinez
We analyze the interactions of particle detectors with coherent states of a free scalar field. We find that the eigenvalues of the post-interaction density matrices of i) a single…
Information carrying capacity of a cosmological constant
Petar Simidzija, Eduardo Martin-Martinez
We analyze the exchange of information in different cosmological backgrounds when sender and receiver are timelike separated and communicate through massless fields (without the ex…