Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Raasakka, Matti"'
Fault-tolerant quantum computers could facilitate the simulation of quantum systems unfeasible for classical computation. However, the noisy intermediate-scale quantum (NISQ) devices of the present and near term are limited and their utilisation requ
Externí odkaz:
http://arxiv.org/abs/2402.16692
Autor:
Rindell, Tom, Yenilen, Berat, Halonen, Niklas, Pönni, Arttu, Tittonen, Ilkka, Raasakka, Matti
Publikováno v:
Phys Lett A 475, 5:128860 (2023)
We study the approximate state preparation problem on noisy intermediate-scale quantum (NISQ) computers by applying a genetic algorithm to generate quantum circuits for state preparation. The algorithm can account for the specific characteristics of
Externí odkaz:
http://arxiv.org/abs/2210.06411
We study the performance and resource usage of the variational quantum factoring (VQF) algorithm for different instance sizes and optimization algorithms. Our simulations show better chance of finding the ground state when using VQE rather than QAOA
Externí odkaz:
http://arxiv.org/abs/2208.07085
Autor:
Raasakka, Matti
Publikováno v:
Class. Quantum Grav. 37, 045014 (2020)
There are important indications that nature may be locally finite-dimensional, i.e., that any spatially bounded subsystem can be described by a finite-dimensional local observable algebra. Motivated by these ideas, we show that operational spacetime
Externí odkaz:
http://arxiv.org/abs/1908.09293
Autor:
Raasakka, Matti
Publikováno v:
Phys. Rev. D 96, 086023 (2017)
We show that local Lorentz covariance arises canonically as the group of transformations between local thermal states in the framework of Local Quantum Physics, given the following three postulates: (i) Local observable algebras are finite-dimensiona
Externí odkaz:
http://arxiv.org/abs/1705.06711
Autor:
Raasakka, Matti
Publikováno v:
SIGMA 13 (2017), 006, 33 pages
Motivated by hints of the effective emergent nature of spacetime structure, we formulate a spacetime-free algebraic framework for quantum theory, in which no a priori background geometric structure is required. Such a framework is necessary in order
Externí odkaz:
http://arxiv.org/abs/1605.03942
Autor:
Oriti, Daniele, Raasakka, Matti
Publikováno v:
SIGMA 10 (2014), 067, 32 pages
We apply the non-commutative Fourier transform for Lie groups to formulate the non-commutative metric representation of the Ponzano-Regge spin foam model for 3d quantum gravity. The non-commutative representation allows to express the amplitudes of t
Externí odkaz:
http://arxiv.org/abs/1401.5819
Autor:
Raasakka, Matti, Tanasa, Adrian
Publikováno v:
Annales Henri Poincare, Volume 16, Issue 5 (2015), Page 1267-1281
In this paper we analyze in detail the next-to-leading order (NLO) of the recently obtained large $N$ expansion for the multi-orientable (MO) tensor model. From a combinatorial point of view, we find the class of Feynman tensor graphs contributing to
Externí odkaz:
http://arxiv.org/abs/1310.3132
Autor:
Raasakka, Matti, Tanasa, Adrian
Publikováno v:
Seminaire Lotharingien de Combinatoire 70 (2014), B70d
The Ben Geloun-Rivasseau quantum field theoretical model is the first tensor model shown to be perturbatively renormalizable. We define here an appropriate Hopf algebra describing the combinatorics of this new tensorial renormalization. The structure
Externí odkaz:
http://arxiv.org/abs/1306.1022
Publikováno v:
J. Math. Phys. 54, 083508 (2013)
The phase space given by the cotangent bundle of a Lie group appears in the context of several models for physical systems. A representation for the quantum system in terms of non-commutative functions on the (dual) Lie algebra, and a generalized not
Externí odkaz:
http://arxiv.org/abs/1301.7750