95 citations · 460 across the 19 of their papers we have counts for
19 papers
A quantum algorithm for solving open system dynamics on quantum computers using noise
Juha Leppäkangas, Nicolas Vogt, Keith R. Fratus +6
In this paper we present a quantum algorithm that uses noise as a resource. The goal of our quantum algorithm is the calculation of operator averages of an open quantum system evol…
Describing Trotterized Time Evolutions on Noisy Quantum Computers via Static Effective Lindbladians
Keith R. Fratus, Kirsten Bark, Nicolas Vogt +4
We consider the extent to which a Trotterized time evolution implemented on a quantum computer is altered by the presence of decoherence. Given a specific set of assumptions regard…
Using gradient-based algorithms to determine ground state energies on a quantum computer
Tomislav Piskor, Florian G. Eich, Jan-Michael Reiner +4
Variational algorithms are promising candidates to be implemented on near-term quantum computers. The variational quantum eigensolver (VQE) is a prominent example, where a parametr…
Observation of separated dynamics of charge and spin in the Fermi-Hubbard model
Frank Arute, Kunal Arya, Ryan Babbush +96
Strongly correlated quantum systems give rise to many exotic physical phenomena, including high-temperature superconductivity. Simulating these systems on quantum computers may avo…
Preparing symmetry broken ground states with variational quantum algorithms
Nicolas Vogt, Sebastian Zanker, Jan-Michael Reiner +3
One of the most promising applications for near term quantum computers is the simulation of physical quantum systems, particularly many-electron systems in chemistry and condensed…
Simulating the fabrication of aluminium oxide tunnel junctions
M. J. Cyster, J. S. Smith, N. Vogt +3
Aluminium oxide (AlO) tunnel junctions are important components in a range of nanoelectric devices including superconducting qubits where they can be used as Josephson…
The effect of atomic structure on the electrical response of aluminium oxide tunnel junctions
M. J. Cyster, J. S. Smith, J. A. Vaitkus +3
Many nanoelectronic devices rely on thin dielectric barriers through which electrons tunnel. For instance, aluminium oxide barriers are used as Josephson junctions in superconducti…
Approximate solutions to Mathieu's equation
Samuel A. Wilkinson, Nicolas Vogt, Dmitry S. Golubev +1
Mathieu's equation has many applications throughout theoretical physics. It is especially important to the theory of Josephson junctions, where it is equivalent to Schrodinger's e…
Breaking time-reversal symmetry with a superconducting flux capacitor
Clemens Müller, Shengwei Guan, Nicolas Vogt +2
We present the design of a passive, on-chip microwave circulator based on a ring of superconducting tunnel junctions. We investigate two distinct physical realisations, based on ei…
Insulating Josephson-junction chains as pinned Luttinger liquids
Karin Cedergren, Roger Ackroyd, Sergey Kafanov +3
Quantum physics in one spatial dimension is remarkably rich, yet even with strong interactions and disorder, surprisingly tractable. This is due to the fact that the low-energy phy…
Coulomb drag and depinning in bilinear Josephson junction arrays
Samuel A. Wilkinson, Nicolas Vogt, Jared H. Cole
Coulomb drag and depinning are electronic transport phenomena that occur in low-dimensional nanostructures. Recently, both phenomena have been reported in bilinear Josephson juncti…
Ab initio calculation of energy levels for phosphorus donors in silicon
J. S. Smith, A. Budi, M. C. Per +5
The s manifold energy levels for phosphorus donors in silicon are important input parameters for the design and modelling of electronic devices on the nanoscale. In this paper we c…
Depinning of disordered bosonic chains
Nicolas Vogt, Jared H. Cole, Alexander Shnirman
We consider one-dimensional bosonic chains with a repulsive boson-boson interaction that decays exponentially on large length-scales. This model describes transport of Cooper-pairs…
Charge filling factors in clean and disordered arrays of tunnel junctions
Kelly A. Walker, Nicolas Vogt, Jared H. Cole
We simulate one-dimensional arrays of tunnel junctions using the kinetic Monte Carlo method to study charge filling behaviour in the large charging energy limit. By applying a smal…
One-dimensional Josephson junction arrays: Lifting the Coulomb blockade by depinning
Nicolas Vogt, Roland Schäfer, Hannes Rotzinger +4
Experiments with one-dimensional arrays of Josephson junctions in the regime of dominating charging energy show that the Coulomb blockade is lifted at the threshold voltage, which…
Stochastic Bloch-Redfield theory: quantum jumps in a solid-state environment
Nicolas Vogt, Jan Jeske, Jared H. Cole
We discuss mapping the Bloch-Redfield master-equation to Lindblad form and then unravelling the resulting evolution into a stochastic Schrödinger equation according to the quantum-…
Excitation- and state-transfer through spin chains in the presence of spatially correlated noise
Jan Jeske, Nicolas Vogt, Jared H. Cole
We investigate the influence of environmental noise on spin networks and spin chains. In addition to the common model of an independent bath for each spin in the system we also con…
Thermally activated conductance in arrays of small Josephson junctions
J. Zimmer, N. Vogt, A. Fiebig +7
We present measurements of the temperature-dependent conductance for series arrays of small-capacitance SQUIDs. At low bias voltages, the arrays exhibit a strong Coulomb blockade,…
Influence of two-level fluctuators on adiabatic passage techniques
Nicolas Vogt, Jared H. Cole, Michael Marthaler +1
We study the process of Stimulated Raman Adiabatic Passage (STIRAP) under the influence of a non-trivial solid-state environment, particularly the effect of two-level fluctuators (…