25 citations · 79 across the 10 of their papers we have counts for
10 papers
Dissipation in Periodically Driven Quantum Systems: Partial Secularization and Thermodynamic Consistency
Luísa T. Tude, Carlos Ortega-Taberner, Roberta Zambrini +1
Periodically driven open quantum systems are central to quantum thermodynamics and quantum control. These systems are typically described using Floquet-Born-Markov master equations…
Qubit reset beyond the Born-Markov approximation: optimal driving to overcome polaron formation
Carlos Ortega-Taberner, Eoin O'Neill, Paul Eastham
Qubits are typically reset into a known state by coupling them to a low-temperature environment. When treated in the Born-Markov approximation such couplings produce exponential re…
Quantum control of the environment in open quantum systems enables rapid qubit reset
Carlos Ortega-Taberner, Eoin O'Neill, Paul Eastham
Qubit reset is crucial in quantum technology and is typically achieved by coupling the qubit to a dissipative environment. However, the achievable speed and fidelity are limited by…
Unifying methods for optimal control in non-Markovian quantum systems via process tensors
Carlos Ortega-Taberner, Eoin O'Neill, Eoin Butler +2
The large dimensionality of environments is the limiting factor in applying optimal control to open quantum systems beyond Markovian approximations. Multiple methods exist to simul…
Disorder and non-Hermiticity in Kitaev spin liquids with a Majorana Fermi surface
Lukas Rødland, Carlos Ortega-Taberner, Megha Agarwal +1
We study the effect of disorder on Z quantum spin liquids with a Majorana Fermi line (respectively surface in three dimensions) and show that depending on the symmetries that a…
From Hermitian critical to non-Hermitian point-gapped phases
Carlos Ortega-Taberner, Maria Hermanns
Recent years have seen a growing interest in topological phases beyond the standard paradigm of gapped, isolated systems. One recent direction is to explore topological features in…
Anomalous Josephson current through a driven double quantum dot
Carlos Ortega-Taberner, Antti-Pekka Jauho, Jens Paaske
Josephson junctions based on quantum dots offer a convenient tunability by means of local gates. Here we analyze a Josephson junction based on a serial double quantum dot in which…
Quantization of topological indices in critical chains at low temperatures
Oleksandr Balabanov, Carlos Ortega-Taberner, Maria Hermanns
Various types of topological phenomena at criticality are currently under active research. In this paper we suggest to generalize the known topological quantities to finite tempera…
Polarization and entanglement spectrum in non-hermitian systems
Carlos Ortega-Taberner, Lukas Rødland, Maria Hermanns
The entanglement spectrum is a useful tool to study topological phases of matter, and contains valuable information about the ground state of the system. Here, we study its propert…
On the relation of the entanglement spectrum to the bulk polarization
Carlos Ortega-Taberner, Maria Hermanns
The bulk polarization is a topological invariant characterizing non-interacting systems in one dimension with chiral or particle-hole symmetries. We show that the bu…