116 citations · 720 across the 26 of their papers we have counts for
27 papers
Performance and scaling analysis of variational quantum simulation
Mario Ponce, Thomas Cope, Inés de Vega +1
We present an empirical analysis of the scaling of the minimal quantum circuit depth required for a variational quantum simulation (VQS) method to obtain a solution to the time evo…
Charge-parity switching effects and optimisation of transmon-qubit design parameters
Miha Papič, Jani Tuorila, Adrian Auer +2
Enhancing the performance of noisy quantum processors requires improving our understanding of error mechanisms and the ways to overcome them. In this study, we identify optimal ran…
Benchmarking Digital-Analog Quantum Computation
Vicente Pina Canelles, Manuel G. Algaba, Hermanni Heimonen +6
Digital-Analog Quantum Computation (DAQC) has recently been proposed as an alternative to the standard paradigm of digital quantum computation. DAQC creates entanglement through a…
Characterizing Physical Error Contributions of Quantum Gates
Miha Papič, Adrian Auer, Inés de Vega
Large-scale quantum computation requires a reliable assessment of the main sources of error in the implemented quantum gates. To this aim, we provide a learning-based framework tha…
Operational Markovianization in Randomized Benchmarking
Pedro Figueroa-Romero, Miha Papič, Adrian Auer +3
A crucial task to obtain optimal and reliable quantum devices is to quantify their overall performance. The average fidelity of quantum gates is a particular figure of merit that c…
Co-Design quantum simulation of nanoscale NMR
Manuel G. Algaba, Mario Ponce-Martinez, Carlos Munuera-Javaloy +7
Quantum computers have the potential to efficiently simulate the dynamics of nanoscale NMR systems. In this work we demonstrate that a noisy intermediate-scale quantum computer can…
Neural Network Based Qubit Environment Characterization
Miha Papič, Inés de Vega
The exact microscopic structure of the environments that produces noise in superconducting qubits remains largely unknown, hindering our ability to have robust simulations an…
Dephasing dynamics of an impurity coupled to an anharmonic environment
Max Bramberger, Inés De Vega
We analyze the dephasing dynamics of an impurity coupled to an anharmonic environment. We show that a strong anharmonicity produces two different effects depending on the environme…
Dynamics of multiple atoms in one-dimensional fields
Carlo Cascio, Jad C. Halimeh, Ian P. McCulloch +2
We analyze the dynamics of a set of two-level atoms coupled to the electromagnetic environment within a waveguide. This problem is often tackled by assuming a weak coupling between…
Stable-unstable transition for a Bose-Hubbard chain coupled to an environment
Chu Guo, Ines de Vega, Ulrich Schollwöck +1
Interactions in quantum systems may induce transitions to exotic correlated phases of matter which can be vulnerable to coupling to an environment. Here, we study the stability of…
Prethermalization and Persistent Order in the Absence of a Thermal Phase Transition
Jad C. Halimeh, Valentin Zauner-Stauber, Ian P. McCulloch +3
We numerically study the dynamics after a parameter quench in the one-dimensional transverse-field Ising model with long-range interactions ( with distance ), for…
Non-Markovianity and memory of the initial state
Margarida Hinarejos, Mari-Carmen Bañuls, Armando Pérez +1
We explore in a rigorous manner the intuitive connection between the non-Markovianity of the evolution of an open quantum system and the performance of the system as a quantum memo…
A weak-coupling master equation for arbitrary initial conditions
Jad C. Halimeh, Ines de Vega
The structure of the initial system-environment state is fundamental to determining the nature and characteristics of the evolution of such an open quantum system. The usual assump…
Dynamics of non-Markovian open quantum systems
Inés de Vega, Daniel Alonso
Open quantum systems (OQS) cannot always be described with the Markov approximation, which requires a large separation of system and environment time scales. Here, we give an overv…
How to discretize a quantum bath for real-time evolution
Ines de Vega, Ulrich Schollwöck, F. Alexander Wolf
Many numerical techniques for the description of quantum systems that are coupled to a continuous bath require the discretization of the latter. To this end, a wealth of methods ha…
Thermofield-based chain mapping approach for open quantum systems
Ines de Vega, Mari-Carmen Bañuls
We consider a thermofield approach to analyze the evolution of an open quantum system coupled to an environment at finite temperature. In this approach, the finite temperature envi…
Decoherence of an entangled state of a strongly-correlated double quantum dot structure through tunneling processes
C. A. Büsser, I. de Vega, F. Heidrich-Meisner
We consider two quantum dots described by the Anderson-impurity model with one electron per dot. The goal of our work is to study the decay of a maximally entangled state between t…
Lattice mapping for many-body open quantum systems and its application to atoms in photonic cystals
Ines de Vega
We present a derivation that maps the original problem of a many body open quantum system (OQS) coupled to a harmonic oscillator reservoir into that of a many body OQS coupled to a…
On the structure of the exact master equation
Ines de Vega
We derive a master equation from the exact stochastic Liouville von-Neumann (SLN) equation \cite{stockburger2002,wallsbook}. The latter depends on two correlated noises and describ…
Quantum dynamics in photonic crystals
Javier Prior, Inés de Vega, Alex W. Chin +2
Employing a recently developed method that is numerically accurate within a model space simulating the real-time dynamics of few-body systems interacting with macroscopic environme…
Simulating quantum-optical phenomena with cold atoms in optical lattices
Carlos Navarrete-Benlloch, Inés de Vega, Diego Porras +1
We propose a scheme involving cold atoms trapped in optical lattices to observe different phenomena traditionally linked to quantum-optical systems. The basic idea consists of conn…
Effects of dissipation in an adiabatic quantum search algorithm
Ines de Vega, Mari Carmen Bañuls, A. Pérez
We consider the effect of two different environments on the performance of the quantum adiabatic search algorithm, a thermal bath at finite temperature, and a structured environmen…
Non-Markovian stochastic description of quantum transport in photosynthetic systems
Ines de Vega
We analyze several aspects of the transport dynamics in the LH1-RC core of purple bacteria, which consists basically in a ring of antenna molecules that transport the energy into a…
Matter--wave emission in optical lattices: Single particle and collective effects
Ines de Vega, Diego Porras, J. Ignacio Cirac
We introduce a simple set--up corresponding to the matter-wave analogue of impurity atoms embedded in an infinite photonic crystal and interacting with the radiation field. Atoms i…