89 citations · 212 across the 14 of their papers we have counts for
14 papers
Quantum Simulation of Coupled Harmonic Oscillators: From Theory to Implementation
Viraj Dsouza, Weronika Golletz, Dimitrios Kranas +3
We investigate the quantum algorithm of Babbush et al. (arXiv:2303.13012v3) for simulating coupled harmonic oscillators, which promises exponential speedups over classical methods.…
An introduction to nonlinear fiber optics and optical analogues to gravitational phenomena
Dimitrios Kranas, Andleeb Zahra, Friedrich König
The optical fiber is a revolutionary technology of the past century. It enables us to manipulate single modes in nonlinear interactions with precision at the quantum level without…
Entanglement in the Schwinger effect
Dimitrios Kranas, Amaury Marchon, Silvia Pla
We analyze entanglement generated by the Schwinger effect using a mode-by-mode formalism for scalar and spinor QED in constant backgrounds. Starting from thermal initial states, we…
Recoherence, adiabaticity, and Markovianity in Gaussian maps
Dimitrios Kranas, Julien Grain, Vincent Vennin
Motivated by the recent discovery of situations where cosmological fluctuations recohere during inflation, we investigate the relationship between quantum recoherence (late-time pu…
Entanglement in an expanding toroidal Bose-Einstein condensate
Anshuman Bhardwaj, Ivan Agullo, Dimitrios Kranas +2
Recent experiments have employed rapidly expanding toroidal Bose-Einstein condensates (BECs) to mimic the inflationary expansion in the early universe. One expected signature of th…
Entanglement from rotating black holes in thermal baths
Ivan Agullo, Anthony J. Brady, Adrià Delhom +1
We extend previous efforts to quantify the entanglement generated in Hawking's evaporation process by including rotation and thermal environments (e.g. the cosmic microwave backgro…
How ubiquitous is entanglement in quantum field theory?
Ivan Agullo, Béatrice Bonga, Patricia Ribes-Metidieri +2
It is well known that entanglement is widespread in quantum field theory, in the following sense: every Reeh-Schlieder state contains entanglement between any two spatially separat…
Robustness of entanglement in Hawking radiation for optical systems immersed in thermal baths
Ivan Agullo, Anthony J. Brady, Dimitrios Kranas
Entanglement is the quantum signature of Hawking's particle pair-creation from causal horizons, for gravitational and analog systems alike. Ambient thermal fluctuations, ubiquitous…
Symplectic circuits, entanglement, and stimulated Hawking radiation in analog gravity
Anthony J. Brady, Ivan Agullo, Dimitrios Kranas
We introduce a convenient set of analytical tools (the Gaussian formalism) and diagrams (symplectic circuits) to analyze multi-mode scattering events in analog gravity, such as pai…
Event horizons are tunable factories of quantum entanglement
Ivan Agullo, Anthony J. Brady, Dimitrios Kranas
That event horizons generate quantum correlations via the Hawking effect is well known. We argue, however, that the creation of entanglement can be modulated as desired, by appropr…
Stimulating the Quantum Aspects of an Optical Analog White-Black Hole
Ivan Agullo, Anthony J. Brady, Dimitrios Kranas
This work introduces a synergistic combination of analytical methods and numerical simulations to study the propagation of weak wave-packet modes in an optical medium containing th…
Anomalies in the Cosmic Microwave Background and their Non-Gaussian Origin in Loop Quantum Cosmology
Ivan Agullo, Dimitrios Kranas, V. Sreenath
Anomalies in the cosmic microwave background (CMB) refer to features that have been observed, mostly at large angular scales, and which show some tension with the statistical predi…
Large scale anomalies in the CMB and non-Gaussianity in bouncing cosmologies
Ivan Agullo, Dimitrios Kranas, V. Sreenath
We propose that several of the anomalies that have been observed at large angular scales in the CMB have a common origin in a cosmic bounce that took place before the inflationary…
Friedmann-like universes with torsion
D. Kranas, C. G. Tsagas, J. D. Barrow +1
We consider spatially homogeneous and isotropic cosmologies with non-zero torsion. Given the high symmetry of these universes, we adopt a specific form for the torsion tensor that…