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- Item1-THz bandwidth of 70-krad/s endless optical polarization control(2014) Koch, Benjamin; Noe, Reinhold; Mirvoda, Vitali; Sandel, David
Show more - Item100krad/s endless polarisation tracking with miniaturised module card(2011) Koch, Benjamin; Noé, R.; Mirvoda, V.; Sandel, D.
Show more - Item112Gb/s PolMux RZ-DQPSK with fast polarization tracking based on interference control(2009) Wernz, H.; Bayer, S.; Olsson, B.E.; Camera, M.; Griesser, H.; Furst, C.; Koch, Benjamin; Mirvoda, V.; Hidayat, A.; Noe, R.
Show more - Item12 krad/s endless polarization stabilization with lithium niobate component(2008) Koch, Benjamin; Hidayat, A.; Zhang, H.; Mirvoda, V.; Lichtinger, M.; Sandel, D.; Noé, R.
Show more - Item140-krad/s, 254-Gigaradian endless optical polarization tracking, independent of analyzed output polarization(2012) Koch, Benjamin; Noé, R.; Mirvoda, V.; Sandel, D.
Show more - Item200-Gb/s, 430-km PDM-RZ-DQPSK (4 bit/symbol) transmission with 10 krad/s endless polarization tracking(2010) Koch, Benjamin; Noé, R.; Sandel, D.; Mirvoda, V.; Filsinger, V.; Puntsri, K.
Show more - Item32-Krad/s polarization and 3-dB PDL tracking in a realtime digital coherent polarization-multiplexed QPSK receiver(2008) Pfau, T.; El-Darawy, M.; Wördehoff, C.; Peveling, R.; Hoffmann, S.; Koch, Benjamin; Adamczyk, O.; Porrmann, M.; Noé, R.
Show more - Item38-krad/s 3.8-grad broadband endless optical polarization tracking using LiNbO3 device(2009) Noé, R.; Koch, Benjamin; Mirvoda, V.; Hidayat, A.; Sandel, D.
Show more - Item40 dB crosstalk suppression in high-precision endless polarization control(2014) Koch, Benjamin; Noé, Reinhold; Mirvoda, Vitali; Sandel, Daniel; Panhwar, M. F.
Show more - Item40-krad/s polarization tracking in 200-Gb/s PDM-RZ-DQPSK transmission over 430 km(2010) Koch, Benjamin; Noé, R.; Mirvoda, V.; Sandel, D.; Filsinger, V.; Puntsri, K.
Show more - ItemA hidden constraint on the Hamiltonian formulation of relativistic worldlines(2019) Koch, Benjamin; Muñoz Pérez, Enrique Vladimir
Show more - ItemA regular scale-dependent black hole solution(2018) Contreras, Ernesto; Rincón, Ángel; Koch, Benjamin; Bargueno, Pedro
Show more - ItemA scale dependent black hole in three-dimensional space-time(2016) Koch, Benjamin; Reyes, Ignacio A.; Rincón, Ángel
Show more - ItemA technique for natural gauge boson masses(2020) Laporte, Cristóbal; Koch, Benjamin; Pontificia Universidad Católica de Chile. Instituto de Física
Show more In this work, a novel mechanism for spontaneous symmetry breaking is presented. This mechanism allows to avoid quadratic divergencies and is thus capable of addressing the hierarchy problem in gauge theories. Using the scale-dependent effective action Γk minimally coupled to a gravitational sector, variational parameter setting provides a mass and vacuum expectation value as a function of the constants arising in the low scale expansion of Newtons’ and cosmological couplings. A comparison with experimental data, such as the Higgs mass, allows putting restrictions on these constants. This generic approach allows comparing with explicit candidates for an effective field theory of gravity. As an example, we use the asymptotic safety scenario, where we find restrictions on the matter content of the theory.In this work, a novel mechanism for spontaneous symmetry breaking is presented. This mechanism allows to avoid quadratic divergencies and is thus capable of addressing the hierarchy problem in gauge theories. Using the scale-dependent effective action Γk minimally coupled to a gravitational sector, variational parameter setting provides a mass and vacuum expectation value as a function of the constants arising in the low scale expansion of Newtons’ and cosmological couplings. A comparison with experimental data, such as the Higgs mass, allows putting restrictions on these constants. This generic approach allows comparing with explicit candidates for an effective field theory of gravity. As an example, we use the asymptotic safety scenario, where we find restrictions on the matter content of the theory.In this work, a novel mechanism for spontaneous symmetry breaking is presented. This mechanism allows to avoid quadratic divergencies and is thus capable of addressing the hierarchy problem in gauge theories. Using the scale-dependent effective action Γk minimally coupled to a gravitational sector, variational parameter setting provides a mass and vacuum expectation value as a function of the constants arising in the low scale expansion of Newtons’ and cosmological couplings. A comparison with experimental data, such as the Higgs mass, allows putting restrictions on these constants. This generic approach allows comparing with explicit candidates for an effective field theory of gravity. As an example, we use the asymptotic safety scenario, where we find restrictions on the matter content of the theory.In this work, a novel mechanism for spontaneous symmetry breaking is presented. This mechanism allows to avoid quadratic divergencies and is thus capable of addressing the hierarchy problem in gauge theories. Using the scale-dependent effective action Γk minimally coupled to a gravitational sector, variational parameter setting provides a mass and vacuum expectation value as a function of the constants arising in the low scale expansion of Newtons’ and cosmological couplings. A comparison with experimental data, such as the Higgs mass, allows putting restrictions on these constants. This generic approach allows comparing with explicit candidates for an effective field theory of gravity. As an example, we use the asymptotic safety scenario, where we find restrictions on the matter content of the theory.Show more - ItemAn angular formalism for spin one half(2014) Koch, Benjamin; Rojas Rojas, Nicolás; Koch, Benjamin; Rojas Rojas, Nicolás.
Show more - ItemAPD-based interference detectors yield 7-dB dynamic range of 70-krad/s PDM-DPSK endless polarization demultiplexer(2014) Koch, Benjamin; Noé, R.; Mirvoda, V.; Sandel, D.; Panhwar, M. F.
Show more - ItemAspects of quantum gravity in AdS3/CFT2(2019) Reyes Raffo, Ignacio Andrés; Erdmenger, Johanna; Koch, Benjamin; Bañados, Máximo; Ströhmer, Raimund; Pontificia Universidad Católica de Chile. Facultad de Física
Show more The quest for finding a unifying theory for both quantum theory and gravity lies at the heart of much of the research in high energy physics. Although recent years have witnessed spectacular experimental confirmation of our expectations from Quantum Field Theory and General Relativity, the question of unification remains as a major open problem. In this context, the perturbative aspects of quantum black holes represent arguably the best of our knowledge of how to proceed in this pursue. In this thesis we investigate certain aspects of quantum gravity in 2 + 1 dimensional anti-de Sitter space (AdS3), and its connection to Conformal field theories in 1 + 1 dimensions (CFT2), via the AdS/CFT correspondence. We study the thermodynamics properties of higher spin black holes. By focusing on the spin-4 case, we show that black holes carrying higher spin charges display a rich phase diagram in the grand canonical ensemble, including phase transitions of the Hawking-Page type, first order inter-black hole transitions, and a second order critical point. We investigate recent proposals on the connection between bulk codimension-1 volumes and computational complexity in the CFT. Using Tensor Networks we provide concrete evidence of why these bulk volumes are related to the number of gates in a quantum circuit, and exhibit their topological properties. We provide a novel formula to compute this complexity directly in terms of entanglement entropies, using techniques from Kinematic space. We then move in a slightly different direction, and study the quantum properties of black holes via de Functional Renormalisation Group prescription coming from Asymptotic safety. We avoid the arbitrary scale setting by restricting to a narrower window in parameter space, where only Newton’s coupling and the cosmological constant are allowed to vary. By one assumption on the properties of Newton’s coupling, we find black hole solutions explicitly. We explore their thermodynamical properties, and discover that very large black holes exhibit very unusual features.The quest for finding a unifying theory for both quantum theory and gravity lies at the heart of much of the research in high energy physics. Although recent years have witnessed spectacular experimental confirmation of our expectations from Quantum Field Theory and General Relativity, the question of unification remains as a major open problem. In this context, the perturbative aspects of quantum black holes represent arguably the best of our knowledge of how to proceed in this pursue. In this thesis we investigate certain aspects of quantum gravity in 2 + 1 dimensional anti-de Sitter space (AdS3), and its connection to Conformal field theories in 1 + 1 dimensions (CFT2), via the AdS/CFT correspondence. We study the thermodynamics properties of higher spin black holes. By focusing on the spin-4 case, we show that black holes carrying higher spin charges display a rich phase diagram in the grand canonical ensemble, including phase transitions of the Hawking-Page type, first order inter-black hole transitions, and a second order critical point. We investigate recent proposals on the connection between bulk codimension-1 volumes and computational complexity in the CFT. Using Tensor Networks we provide concrete evidence of why these bulk volumes are related to the number of gates in a quantum circuit, and exhibit their topological properties. We provide a novel formula to compute this complexity directly in terms of entanglement entropies, using techniques from Kinematic space. We then move in a slightly different direction, and study the quantum properties of black holes via de Functional Renormalisation Group prescription coming from Asymptotic safety. We avoid the arbitrary scale setting by restricting to a narrower window in parameter space, where only Newton’s coupling and the cosmological constant are allowed to vary. By one assumption on the properties of Newton’s coupling, we find black hole solutions explicitly. We explore their thermodynamical properties, and discover that very large black holes exhibit very unusual features.The quest for finding a unifying theory for both quantum theory and gravity lies at the heart of much of the research in high energy physics. Although recent years have witnessed spectacular experimental confirmation of our expectations from Quantum Field Theory and General Relativity, the question of unification remains as a major open problem. In this context, the perturbative aspects of quantum black holes represent arguably the best of our knowledge of how to proceed in this pursue. In this thesis we investigate certain aspects of quantum gravity in 2 + 1 dimensional anti-de Sitter space (AdS3), and its connection to Conformal field theories in 1 + 1 dimensions (CFT2), via the AdS/CFT correspondence. We study the thermodynamics properties of higher spin black holes. By focusing on the spin-4 case, we show that black holes carrying higher spin charges display a rich phase diagram in the grand canonical ensemble, including phase transitions of the Hawking-Page type, first order inter-black hole transitions, and a second order critical point. We investigate recent proposals on the connection between bulk codimension-1 volumes and computational complexity in the CFT. Using Tensor Networks we provide concrete evidence of why these bulk volumes are related to the number of gates in a quantum circuit, and exhibit their topological properties. We provide a novel formula to compute this complexity directly in terms of entanglement entropies, using techniques from Kinematic space. We then move in a slightly different direction, and study the quantum properties of black holes via de Functional Renormalisation Group prescription coming from Asymptotic safety. We avoid the arbitrary scale setting by restricting to a narrower window in parameter space, where only Newton’s coupling and the cosmological constant are allowed to vary. By one assumption on the properties of Newton’s coupling, we find black hole solutions explicitly. We explore their thermodynamical properties, and discover that very large black holes exhibit very unusual features.Show more - ItemBlack hole shadow of a rotating scale-dependent black hole(2020) Contreras, E.; Rincón, Ángel; Panotopoulos, G.; Bargueno, P.; Koch, Benjamin
Show more - ItemBlack hole solutions for scale-dependent couplings : the de Sitter and the Reissner-Nordstrom case(2016) Koch, Benjamin; Rioseco, Paola
Show more - ItemBlack holes in scale-dependent frameworks.(2019) Rincón, Ángel; Koch, Benjamin; Pontificia Universidad Católica de Chile. Facultad de Física
Show more In the present thesis, we investigate the scale–dependence of some well known black hole solutions in 2+1 dimensions at the level of the effective action in the presence of a cosmological constant or an electrical source. We promote the classical parameters of the theory, {G0,(· · ·)0}, to scale–dependent couplings, {Gk,(· · ·)k} and then we solve the corresponding effective Einstein field equations. To close the system of equations we impose the null energy condition. This last condition (valid in arbitrary dimension) provides a differential equation which, after solving it, allows to obtain in a simple way the specific form of the gravitational coupling. Furthermore, perfect-fluid like parameters are induced via the scale-dependent gravitational coupling. Finally, to exemplify the effect of the running of the couplings on the properties of the scale-dependent black hole solutions, we show a few concrete examples.In the present thesis, we investigate the scale–dependence of some well known black hole solutions in 2+1 dimensions at the level of the effective action in the presence of a cosmological constant or an electrical source. We promote the classical parameters of the theory, {G0,(· · ·)0}, to scale–dependent couplings, {Gk,(· · ·)k} and then we solve the corresponding effective Einstein field equations. To close the system of equations we impose the null energy condition. This last condition (valid in arbitrary dimension) provides a differential equation which, after solving it, allows to obtain in a simple way the specific form of the gravitational coupling. Furthermore, perfect-fluid like parameters are induced via the scale-dependent gravitational coupling. Finally, to exemplify the effect of the running of the couplings on the properties of the scale-dependent black hole solutions, we show a few concrete examples.In the present thesis, we investigate the scale–dependence of some well known black hole solutions in 2+1 dimensions at the level of the effective action in the presence of a cosmological constant or an electrical source. We promote the classical parameters of the theory, {G0,(· · ·)0}, to scale–dependent couplings, {Gk,(· · ·)k} and then we solve the corresponding effective Einstein field equations. To close the system of equations we impose the null energy condition. This last condition (valid in arbitrary dimension) provides a differential equation which, after solving it, allows to obtain in a simple way the specific form of the gravitational coupling. Furthermore, perfect-fluid like parameters are induced via the scale-dependent gravitational coupling. Finally, to exemplify the effect of the running of the couplings on the properties of the scale-dependent black hole solutions, we show a few concrete examples.In the present thesis, we investigate the scale–dependence of some well known black hole solutions in 2+1 dimensions at the level of the effective action in the presence of a cosmological constant or an electrical source. We promote the classical parameters of the theory, {G0,(· · ·)0}, to scale–dependent couplings, {Gk,(· · ·)k} and then we solve the corresponding effective Einstein field equations. To close the system of equations we impose the null energy condition. This last condition (valid in arbitrary dimension) provides a differential equation which, after solving it, allows to obtain in a simple way the specific form of the gravitational coupling. Furthermore, perfect-fluid like parameters are induced via the scale-dependent gravitational coupling. Finally, to exemplify the effect of the running of the couplings on the properties of the scale-dependent black hole solutions, we show a few concrete examples.Show more