33 citations · 199 across the 22 of their papers we have counts for
23 papers
Optimized quantum state transfer in a quasiperiodic ultracold atomic gas
Andreas Völkering, Arnob Kumar Ghosh, Patric Holmvall +1
Ultracold atomic systems offer a highly controllable platform for investigating quantum state transfer through the precise dynamical manipulation of system parameters. While quanti…
Observation of end-to-end pumping in a quasiperiodic Fibonacci-type photonic chain
Arnob Kumar Ghosh, Ang Chen, Ashraf El Hassan +3
End-to-end pumps utilizing edge-localized states offer a promising route to operate as connecting buses, supplying efficient and robust connectivity between non-neighboring element…
Nonuniform superconducting states from Majorana flat bands
Sushanth Varada, Aksel Kobiałka, Ankita Bhattacharya +2
Zero-energy flat bands within the superconducting gap can give rise to competing ordered phases. We investigate such phases in topological superconductors based on the magnetic ada…
Unifying description of competing chiral and nematic superconducting states in twisted bilayer graphene
Lucas Baldo, Patric Holmvall, Annica M. Black-Schaffer
We reveal a striking correspondence between electron- and phonon-driven pairing in twisted bilayer graphene (TBG) by mapping an atomistic electronically driven pairing model onto a…
Quantum state transfer and maximal entanglement between distant qubits using a minimal quasicrystal pump
Arnob Kumar Ghosh, Rubén Seoane Souto, Vahid Azimi-Mousolou +2
Coherent quantum state transfer over macroscopic distances between non-neighboring elements in quantum circuits is a crucial component to increase connectivity and simplify quantum…
Quantum metric and localization in a quasicrystal
Quentin Marsal, Patric Holmvall, Annica M. Black-Schaffer
We use the quantum metric to understand the properties of quasicrystals, represented by the one-dimensional (1D) Fibonacci chain. We show that the quantum metric can relate the loc…
Designing edge currents using mesoscopic patterning in chiral d-wave superconductors
Patric Holmvall, Annica M. Black-Schaffer
Chiral superconductors are topological as characterized by a finite Chern number and chiral edge modes. Direct fingerprints of chiral superconductivity are thus often taken to be s…
Impurity strength-temperature phase diagram with phase crystals and competing time-reversal symmetry breaking states in nodal -wave superconductors
Kevin Marc Seja, Niclas Wall-Wennerdal, Tomas Löfwander +3
Phase crystals are a class of nonuniform superconducting ground states characterized by spontaneous phase gradients of the superconducting order parameter. These phase gradients no…
Topological superconductivity in Fibonacci quasicrystals
Aksel Kobiałka, Oladunjoye A. Awoga, Martin Leijnse +3
We investigate the properties of a Fibonacci quasicrystal (QC) arrangement of a one-dimensional topological superconductor, such as a magnetic atom chain deposited on a superconduc…
Josephson effect in a Fibonacci quasicrystal
Anna Sandberg, Oladunjoye A. Awoga, Annica M. Black-Schaffer +1
Quasiperiodicity has recently been proposed to enhance superconductivity and its proximity effect. At the same time, there has been significant experimental progress in the fabrica…
Enhanced chiral edge currents and orbital magnetic moment in chiral -wave superconductors from mesoscopic finite-size effects
Patric Holmvall, Annica M. Black-Schaffer
Chiral superconductors spontaneously break time-reversal symmetry and host topologically protected edge modes, supposedly generating chiral edge currents which are typically taken…
Robust and tunable coreless vortices and fractional vortices in chiral -wave superconductors
Patric Holmvall, Niclas Wall-Wennerdal, Annica M. Black-Schaffer
Chiral -wave superconductivity has recently been proposed in a wide range of materials based on both experiment and theoretical works. Chiral superconductors host a finite Chern…
Defect-induced band restructuring and length scales in twisted bilayer graphene
Lucas Baldo, Tomas Löthman, Patric Holmvall +1
We investigate the effects of single, multiple, and extended defects in the form of non-magnetic impurities and vacancies in twisted bilayer graphene (TBG) at and away from the mag…
Coreless vortices as direct signature of chiral -wave superconductivity
Patric Holmvall, Annica M. Black-Schaffer
Chiral -wave superconductivity has been proposed in a number of different materials, but characteristic experimental fingerprints have been largely lacking. We show that quadrup…
SuperConga: an open-source framework for mesoscopic superconductivity
P. Holmvall, N. Wall Wennerdal, M. Håkansson +4
We present SuperConga, an open-source framework for simulating equilibrium properties of unconventional and ballistic singlet superconductors, confined to two-dimensional (2D) meso…
Deterministic Gaussian conversion protocols for non-Gaussian single-mode resources
Oliver Hahn, Patric Holmvall, Pascal Stadler +2
In the context of quantum technologies over continuous variables, Gaussian states and operations are typically regarded as freely available, as they are relatively easily accessibl…
Gaussian conversion protocols for cubic phase state generation
Yu Zheng, Oliver Hahn, Pascal Stadler +4
Universal quantum computing with continuous variables requires non-Gaussian resources, in addition to a Gaussian set of operations. A known resource enabling universal quantum comp…
Breaking time-reversal and translational symmetry at edges of -wave superconductors: microscopic theory and comparison with quasiclassical theory
N. Wall Wennerdal, A. Ask, P. Holmvall +2
We report results of a microscopic calculation of a second-order phase transition into a state breaking time-reversal and translational invariance along pair-breaking edges of -…
Phase Crystals
P. Holmvall, M. Fogelström, T. Löfwander +1
Superconductivity owes its properties to the phase of the electron pair condensate that breaks the symmetry. In the most traditional ground state, the phase is uniform and r…
Spontaneous symmetry-breaking at surfaces of -wave superconductors: influence of geometry and surface ruggedness
P. Holmvall, A. Vorontsov, M. Fogelstrom +1
Surfaces of -wave superconductors may host a substantial density of zero-energy Andreev states. The zero-energy flat band appears due to a topological constraint, but comes with…
Spontaneously broken translational symmetry at edges of high-temperature superconductors: thermodynamics in magnetic field
P. Holmvall, A. B. Vorontsov, M. Fogelstrom +1
We investigate equilibrium properties, including structure of the order parameter, superflow patterns, and thermodynamics of low-temperature surface phases of layered d_{x^2-y^2}-w…
Spontaneous generation of fractional vortex-antivortex pairs at single edges of high-Tc superconductors
Patric Holmvall, Tomas Löfwander, Mikael Fogelström
Unconventional d-wave superconductors with pair-breaking edges are predicted to have ground states with spontaneously broken time-reversal and translational symmetries. We use the…
Collinear cluster tri-partition: Kinematics constraints and stability of collinearity
Patric Holmvall, Ulli Köster, Andreas Heinz +1
A new mode of nuclear fission has been proposed by the FOBOS collaboration, called Collinear Cluster Tri-partition (CCT), suggesting that three heavy fission fragments can be emitt…