Íñigo Arrazola
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View article: Symmetry-Protected Topological Haldane Phase on a Qudit Quantum Processor
Symmetry-Protected Topological Haldane Phase on a Qudit Quantum Processor Open
Symmetry-protected topological phases have fundamentally changed our understanding of quantum matter. An archetypal example of such a quantum phase of matter is the Haldane phase, containing the spin-1 Heisenberg chain. The intrinsic quant…
View article: Constructing the spin-1 Haldane phase on a qudit quantum processor
Constructing the spin-1 Haldane phase on a qudit quantum processor Open
Symmetry-protected topological phases have fundamentally changed our understanding of quantum matter. An archetypal example of such a quantum phase of matter is the Haldane phase, containing the spin-1 Heisenberg chain. The intrinsic quant…
View article: Non-classical excitation of a solid-state quantum emitter
Non-classical excitation of a solid-state quantum emitter Open
The interaction between a single emitter and a single photon is a fundamental aspect of quantum optics. This interaction allows for the study of various quantum processes, such as emitter-mediated single-photon scattering and effective pho…
View article: Boson sampling with ultracold atoms in a programmable optical lattice
Boson sampling with ultracold atoms in a programmable optical lattice Open
Sampling from a quantum distribution can be exponentially hard for classical computers and yet could be performed efficiently by a noisy intermediate-scale quantum device. A prime example of a distribution that is hard to sample is given b…
View article: Toward high-fidelity quantum information processing and quantum simulation with spin qubits and phonons
Toward high-fidelity quantum information processing and quantum simulation with spin qubits and phonons Open
We analyze the implementation of high-fidelity, phonon-mediated gate operations and quantum simulation schemes for spin qubits associated with silicon vacancy centers in diamond. Specifically, we show how the application of continuous dyna…
View article: Penning-trap eigenfrequency measurements with optical radiofrequency detectors
Penning-trap eigenfrequency measurements with optical radiofrequency detectors Open
We use an electric-dipole laser-driven transition to precisely measure the cyclotron-frequency ratios of the pairs Ca
View article: Penning-trap eigenfrequency measurements with optical radiofrequency detectors
Penning-trap eigenfrequency measurements with optical radiofrequency detectors Open
We use an electric-dipole laser-driven transition to precisely measure the cyclotron-frequency ratios of the pairs $^{42}$Ca$^+$-$^{40}$Ca$^+$, $^{44}$Ca$^+$-$^{40}$Ca$^+$ and $^{48}$Ca$^+$-$^{40}$Ca$^+$ in a 7-tesla Penning trap. A single…
View article: Robust oscillator-mediated phase gates driven by low-intensity pulses
Robust oscillator-mediated phase gates driven by low-intensity pulses Open
Robust qubit-qubit interactions mediated by bosonic modes are central to many quantum technologies. Existing proposals combining fast oscillator-mediated gates with dynamical decoupling require strong pulses or fast control over the qubit-…
View article: Robust two-qubit gates using pulsed dynamical decoupling
Robust two-qubit gates using pulsed dynamical decoupling Open
We present the experimental implementation of a two-qubit phase gate, using a radio frequency (RF) controlled trapped-ion quantum processor. The RF-driven gate is generated by a pulsed dynamical decoupling sequence applied to the ions’ car…
View article: Boson sampling with ultracold atoms in a programmable optical lattice
Boson sampling with ultracold atoms in a programmable optical lattice Open
Sampling from a quantum distribution can be exponentially hard for classical computers and yet could be performed efficiently by a noisy intermediate-scale quantum device. A prime example of a distribution that is hard to sample is given b…
View article: Robust Two-Qubit Gates Using Pulsed Dynamical Decoupling
Robust Two-Qubit Gates Using Pulsed Dynamical Decoupling Open
We present the experimental implementation of a two-qubit phase gate, using a radio frequency (RF) controlled trapped-ion quantum processor. The RF-driven gate is generated by a pulsed dynamical decoupling sequence applied to the ions' car…
View article: Phase-Adaptive Dynamical Decoupling Methods for Robust Spin-Spin Dynamics in Trapped Ions
Phase-Adaptive Dynamical Decoupling Methods for Robust Spin-Spin Dynamics in Trapped Ions Open
Quantum platforms based on trapped ions are main candidates to build a\nquantum hardware with computational capacities that largely surpass those of\nclassical devices. Among the available control techniques in these setups,\npulsed dynami…
View article: Design of Light-Matter Interactions for Quantum Technologies
Design of Light-Matter Interactions for Quantum Technologies Open
In this Thesis we design radiation patterns capable of creating effective light-matter interactions suited to applications in quantum computing, quantum simulation and quantum sensing. On the one hand, we have used dynamical decoupling tec…
View article: Probabilistic eigensolver with a trapped-ion quantum processor
Probabilistic eigensolver with a trapped-ion quantum processor Open
Quantum simulation of complex quantum systems and their properties often\nrequires the ability to prepare initial states in an eigenstate of the\nHamiltonian to be simulated. In addition, to compute the eigenvalues of a\nHamiltonian is in …
View article: Selective interactions in the quantum Rabi model
Selective interactions in the quantum Rabi model Open
We demonstrate the emergence of selective $k$-photon interactions in the strong and ultrastrong coupling regimes of the quantum Rabi model with a Stark coupling term. In particular, we show that the interplay between the rotating and count…
View article: Double quantum magnetometry at large static magnetic fields
Double quantum magnetometry at large static magnetic fields Open
We present a protocol to achieve double quantum magnetometry at large static magnetic fields. This is a regime where sensitive sample parameters, such as the chemical shift, get enhanced facilitating their characterization. In particular, …
View article: Quantum algorithm for solving linear differential equations: Theory and experiment
Quantum algorithm for solving linear differential equations: Theory and experiment Open
We present and experimentally realize a quantum algorithm for efficiently solving the following problem: given an $N\times N$ matrix $\mathcal{M}$, an $N$-dimensional vector $\textbf{\emph{b}}$, and an initial vector $\textbf{\emph{x}}(0)$…
View article: Hybrid Microwave-Radiation Patterns for High-Fidelity Quantum Gates with Trapped Ions
Hybrid Microwave-Radiation Patterns for High-Fidelity Quantum Gates with Trapped Ions Open
We present a method that combines continuous and pulsed microwave radiation\npatterns to achieve robust interactions among hyperfine trapped ions placed in\na magnetic field gradient. More specifically, our scheme displays continuous\nmicr…
View article: Roque Espinosa (2014). Desmemoria y olvido. La economía arrocera en la cuenca del Guayas
Roque Espinosa (2014). Desmemoria y olvido. La economía arrocera en la cuenca del Guayas Open
Reseña de "Desmemoria y olvido. La economía arrocera en la cuenca del Guayas"
View article: Dynamics of an unbalanced two-ion crystal in a Penning trap for application in optical mass spectrometry
Dynamics of an unbalanced two-ion crystal in a Penning trap for application in optical mass spectrometry Open
In this article, the dynamics of an unbalanced two-ion crystal comprising the\n'target' and the 'sensor' ions confined in a Penning trap has been studied.\nFirst, the low amplitude regime is addressed. In this regime, the overall\npotentia…
View article: Symmetry in Quantum Optics Models
Symmetry in Quantum Optics Models Open
Prototypical quantum optics models, such as the Jaynes–Cummings, Rabi, Tavis–Cummings, and Dicke models, are commonly analyzed with diverse techniques, including analytical exact solutions, mean-field theory, exact diagonalization, and so …
View article: Selective hybrid spin interactions with low radiation power
Selective hybrid spin interactions with low radiation power Open
We present a protocol for designing appropriately extended $\pi$ pulses that achieves tunable, thus selective, electron-nuclear spin interactions with low-driving radiation power. Our method is general since it can be applied to different …
View article: Pulsed dynamical decoupling for fast and robust two-qubit gates on trapped ions
Pulsed dynamical decoupling for fast and robust two-qubit gates on trapped ions Open
We propose a pulsed dynamical decoupling protocol as the generator of tunable, fast, and robust quantum phase gates between two microwave-driven trapped ion hyperfine qubits. The protocol consists of sequences of $\pi$-pulses acting on ion…
View article: Nonlinear quantum Rabi model in trapped ions
Nonlinear quantum Rabi model in trapped ions Open
We study the nonlinear dynamics of trapped-ion models far away from the\nLamb-Dicke regime. This nonlinearity induces a sideband cooling blockade,\nstopping the propagation of quantum information along the Hilbert space of the\nJaynes-Cumm…
View article: A Single-Ion Reservoir as a High-Sensitive Sensor of Electric Signals
A Single-Ion Reservoir as a High-Sensitive Sensor of Electric Signals Open
View article: Switchable particle statistics with an embedding quantum simulator
Switchable particle statistics with an embedding quantum simulator Open
We propose the implementation of a switch of particle statistics with an embedding quantum simulator. By encoding both Bose-Einstein and Fermi-Dirac statistics into an enlarged Hilbert space, the statistics of quantum particles may be chan…
View article: Digital-Analog Quantum Simulation of Spin Models in Trapped Ions
Digital-Analog Quantum Simulation of Spin Models in Trapped Ions Open