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Noisy gates for simulating quantum computers / Di Bartolomeo, Giovanni (Trieste U. ; INFN, Trieste) ; Vischi, Michele (Trieste U. ; INFN, Trieste) ; Cesa, Francesco (Trieste U. ; INFN, Trieste) ; Wixinger, Roman (Zurich, ETH) ; Grossi, Michele (CERN) ; Donadi, Sandro (INFN, Trieste) ; Bassi, Angelo (Trieste U. ; INFN, Trieste)
We present a novel method for simulating the noisy behaviour of quantum computers, which allows to efficiently incorporate environmental effects in the driven evolution implementing the gates acting on the qubits. We show how to modify the noiseless gate executed by the computer to include any Markovian noise, hence resulting in what we will call a noisy gate. [...]
arXiv:2301.04173.- 2023-12-06 - 19 p. - Published in : Phys. Rev. Res. 5 (2023) 043210 Fulltext: 2301.04173 - PDF; Publication - PDF;

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Estimates of loss function concentration in noisy parametrized quantum circuits / Crognaletti, Giulio (INFN, Trieste ; CERN ; Trieste U.) ; Grossi, Michele (CERN) ; Bassi, Angelo (INFN, Trieste ; Trieste U.)
Variational quantum computing provides a versatile computational approach, applicable to a wide range of fields such as quantum chemistry, machine learning, and optimization problems. [...]
arXiv:2410.01893. - 24.
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Spontaneous collapse models lead to the emergence of classicality of the Universe / Gaona-Reyes, José Luis (Trieste U. ; INFN, Trieste) ; Menéndez-Pidal, Lucía (Madrid U.) ; Faizal, Mir (British Columbia U., Okanagan ; CQRC, Vernon ; CERN) ; Carlesso, Matteo (Trieste U. ; INFN, Trieste ; Queen's U., Belfast)
Assuming that Quantum Mechanics is universal and that it can be applied over all scales, then the Universe is allowed to be in a quantum superposition of states, where each of them can correspond to a different space-time geometry. How can one then describe the emergence of the classical, well-defined geometry that we observe? Considering that the decoherence-driven quantum-to-classical transition relies on external physical entities, this process cannot account for the emergence of the classical behaviour of the Universe. [...]
arXiv:2401.08269.- 2024-02-23 - 17 p. - Published in : JHEP 2402 (2024) 193 Fulltext: 2401.08269 - PDF; Publication - PDF;

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Wide-angle effects in the galaxy bispectrum / Pardede, Kevin (SISSA, Trieste ; ICTP, Trieste ; IFPU, Trieste ; INFN, Trieste ; Trieste Observ.) ; Di Dio, Enea (CERN) ; Castorina, Emanuele (Milan U.)
Primordial non-Gaussianities (PNG) leave unique signatures in the bispectrum of the large-scale structure. With upcoming galaxy surveys set to improve PNG constraints by at least one order of magnitude, it is important to account for any potential contamination. [...]
arXiv:2302.12789; CERN-TH-2023-033.- 2023-09-14 - 27 p. - Published in : JCAP 2309 (2023) 030 Fulltext: 2302.12789 - PDF; document - PDF;

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Constraints on dark photon dark matter from Lyman-$\alpha$ forest simulations and an ultra-high signal-to-noise quasar spectrum / Trost, Andrea (Trieste U. ; Trieste Observ. ; INFN, Trieste) ; Bolton, James S. (Nottingham U.) ; Caputo, Andrea (CERN) ; Liu, Hongwan (Boston U. ; Chicago U., KICP ; Fermilab) ; Cristiani, Stefano (Trieste Observ. ; INFN, Trieste ; IFPU, Trieste) ; Viel, Matteo (Trieste Observ. ; INFN, Trieste ; IFPU, Trieste ; SISSA, Trieste)
The ultralight dark photon is a well-motivated, hypothetical dark matter candidate. [...]
arXiv:2410.02858 ; FERMILAB-PUB-24-0739-V. - 14.
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Euclid. IV. The NISP Calibration Unit / Euclid Collaboration
The near-infrared calibration unit (NI-CU) on board Euclid's Near-Infrared Spectrometer and Photometer (NISP) is the first astronomical calibration lamp based on light-emitting diodes (LEDs) to be operated in space. [...]
arXiv:2405.13494. - 21.
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Taming Mass Gaps with Anti–de Sitter Space / Copetti, Christian (Oxford U., Inst. Math.) ; Di Pietro, Lorenzo (Trieste U. ; INFN, Trieste) ; Ji, Ziming (INFN, Trieste ; SISSA, Trieste) ; Komatsu, Shota (CERN)
Anti-de-Sitter space acts as an infra-red cut off for asymptotically free theories, allowing interpolation between a weakly-coupled small-sized regime and a strongly-coupled flat-space regime. We scrutinize the interpolation for theories in two dimensions from the perspective of boundary conformal theories. [...]
arXiv:2312.09277.- 2024-08-19 - 6 p. - Published in : Phys. Rev. Lett. 133 (2024) 081601 Fulltext: 2312.09277 - PDF; Publication - PDF;

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Cosmological Correlators at Finite Coupling / Di Pietro, Lorenzo (Trieste U. ; INFN, Trieste) ; Gorbenko, Victor (EPFL, Lausanne, FSL) ; Komatsu, Shota (CERN)
We study finite-coupling effects of QFT on a rigid de Sitter (dS) background taking the $O(N)$ vector model at large $N$ as a solvable example. [...]
arXiv:2312.17195. - 25.
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Holography and Localization of Information in Quantum Gravity / Bahiru, Eyoab (SISSA, Trieste ; INFN, Trieste ; ICTP, Trieste) ; Belin, Alexandre (Milan Bicocca U. ; Ecole Polytechnique, Lausanne) ; Papadodimas, Kyriakos (CERN) ; Sarosi, Gabor (CERN) ; Vardian, Niloofar (SISSA, Trieste ; INFN, Trieste)
Within the AdS/CFT correspondence, we identify a class of CFT operators which represent diff-invariant and approximately local observables in the gravitational dual. Provided that the bulk state breaks all asymptotic symmetries, we show that these operators commute to all orders in $1/N$ with asymptotic charges, thus resolving an apparent tension between locality in perturbative quantum gravity and the gravitational Gauss law. [...]
arXiv:2301.08753; CERN-TH-2023-003.- 2024-05-23 - 83 p. - Published in : JHEP 2405 (2024) 261 Fulltext: 2301.08753 - PDF; document - PDF;

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Neutral Hadrons Disappearing into the Darkness / Barducci, D. (SISSA, Trieste) ; Fabbrichesi, M. (INFN, Trieste) ; Gabrielli, E. (INFN, Trieste ; NICPB, Tallinn ; CERN)
We study the invisible decay of neutral hadrons in a representative model of the dark sector. The mesons $K_L$ and $B^0$ decay into the dark sector with branching rates that can be at the current experimental limits. [...]
arXiv:1806.05678.- 2018-09-01 - 9 p. - Published in : Phys. Rev. D 98 (2018) 035049 Article from SCOAP3: PDF; Fulltext: PDF;

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