45 citations · 361 across the 23 of their papers we have counts for
23 papers
Full counting statistics and first-passage times in quantum Markovian processes: Ensemble relations, metastability, and fluctuation theorems
Paul Menczel, Christian Flindt, Fredrik Brange +2
We develop a comprehensive framework for characterizing fluctuations in quantum transport and nonequilibrium thermodynamics using two complementary approaches: full counting statis…
Real-Time Detection and Control of Correlated Charge Tunneling in a Quantum Dot
Johannes C. Bayer, Fredrik Brange, Adrian Schmidt +4
We experimentally demonstrate the real-time detection and control of correlated charge tunneling in a dynamically driven quantum dot. Specifically, we measure the joint distributio…
Lee-Yang theory of the superradiant phase transition in the open Dicke model
Fredrik Brange, Neill Lambert, Franco Nori +1
The Dicke model describes an ensemble of two-level atoms that are coupled to a confined light mode of an optical cavity. Above a critical coupling, the cavity becomes macroscopical…
Heat Pulses in Electron Quantum Optics
Pedro Portugal, Fredrik Brange, Christian Flindt
Electron quantum optics aims to realize ideas from the quantum theory of light with the role of photons being played by charge pulses in electronic conductors. Experimentally, the…
Adiabatic Cooper pair splitter
Fredrik Brange, Riya Baruah, Christian Flindt
Recent experiments have observed Cooper pair splitting in quantum dots coupled to superconductors, and efficient schemes for controlling and timing the splitting process are now ca…
Photon emission statistics of a driven microwave cavity
Pedro Portugal, Fredrik Brange, Kalle S. U. Kansanen +2
Recent experimental advances have made it possible to detect individual quantum jumps in open quantum systems, such as the tunneling of single electrons in nanoscale conductors or…
Lee-Yang theory of Bose-Einstein condensation
Fredrik Brange, Tuomas Pyhäranta, Eppu Heinonen +2
Bose-Einstein condensation happens as a gas of bosons is cooled below its transition temperature, and the ground state becomes macroscopically occupied. The phase transition occurs…
Effective temperature pulses in open quantum systems
Pedro Portugal, Fredrik Brange, Christian Flindt
Controlling the temperature of nano-scale quantum systems is becoming increasingly important in the efforts to develop thermal devices such as quantum heat valves, heat engines, an…
Dynamical quantum phase transitions in strongly correlated two-dimensional spin lattices following a quench
Fredrik Brange, Sebastiano Peotta, Christian Flindt +1
Dynamical quantum phase transitions are at the forefront of current efforts to understand quantum matter out of equilibrium. Except for a few exactly solvable models, predictions o…
Nonequilibrium phase transition in a single-electron micromaser
Fredrik Brange, Aydin Deger, Christian Flindt
Phase transitions occur in a wide range of physical systems and are characterized by the abrupt change of a physical observable in response to the variation of an external control…
Optimal Entanglement Witness for Cooper Pair Splitters
Minh Tam, Christian Flindt, Fredrik Brange
The generation of spin-entangled electrons is an important prerequisite for future solid-state quantum technologies. Cooper pairs in a superconductor can be split into separate ele…
Dynamic Cooper Pair Splitter
Fredrik Brange, Kacper Prech, Christian Flindt
Cooper pair splitters are promising candidates for generating spin-entangled electrons. However, the splitting of Cooper pairs is a random and noisy process, which hinders further…
Real-time observation of Cooper pair splitting showing strong non-local correlations
Antti Ranni, Fredrik Brange, Elsa T. Mannila +2
Controlled generation and detection of quantum entanglement between spatially separated particles constitute an essential prerequisite both for testing the foundations of quantum m…
Determination of dynamical quantum phase transitions in strongly correlated many-body systems using Loschmidt cumulants
Sebastiano Peotta, Fredrik Brange, Aydin Deger +2
Dynamical phase transitions extend the notion of criticality to non-stationary settings and are characterized by sudden changes in the macroscopic properties of time-evolving quant…
Lee-Yang theory, high cumulants, and large-deviation statistics of the magnetization in the Ising model
Aydin Deger, Fredrik Brange, Christian Flindt
We investigate the Ising model in one, two, and three dimensions using a cumulant method that allows us to determine the Lee-Yang zeros from the magnetization fluctuations in small…
Controlled emission time statistics of a dynamic single-electron transistor
Fredrik Brange, Adrian Schmidt, Johannes C. Bayer +3
Quantum technologies involving qubit measurements based on electronic interferometers rely critically on accurate single-particle emission. However, achieving precisely timed opera…
Noise and full counting statistics of a Cooper pair splitter
Nicklas Walldorf, Fredrik Brange, Ciprian Padurariu +1
We investigate theoretically the noise and the full counting statistics of electrons that are emitted from a superconductor into two spatially separated quantum dots by the splitti…
Observing temperature fluctuations of a mesoscopic electron system
Bayan Karimi, Fredrik Brange, Peter Samuelsson +1
Almost a century ago, Johnson and Nyquist presented evidence of fluctuating electrical current and the governing fluctuation dissipation theorem (FDT). Whether, likewise, temperatu…
Photon counting statistics of a microwave cavity
Fredrik Brange, Paul Menczel, Christian Flindt
The development of microwave photon detectors is paving the way for a wide range of quantum technologies and fundamental discoveries involving single photons. Here, we investigate…
Nanoscale Quantum Calorimetry with Electronic Temperature Fluctuations
F. Brange, P. Samuelsson, B. Karimi +1
Motivated by the recent development of fast and ultra-sensitive thermometry in nanoscale systems, we investigate quantum calorimetric detection of individual heat pulses in the sub…
Minimal Entanglement Witness From Electrical Current Correlations
F. Brange, O. Malkoc, P. Samuelsson
Despite great efforts, an unambiguous demonstration of entanglement of mobile electrons in solid state conductors is still lacking. Investigating theoretically a generic entangler-…
Energy and temperature fluctuations in the single electron box
Tineke L. van den Berg, Fredrik Brange, Peter Samuelsson
In mesoscopic and nanoscale systems at low temperatures, charge carriers are typically not in thermal equilibrium with the surrounding lattice. The resulting, non-equilibrium dynam…
Sub Decoherence Time Generation and Detection of Orbital Entanglement
F. Brange, O. Malkoc, P. Samuelsson
Recent experiments have demonstrated sub decoherence time control of individual single-electron orbital qubits. Here we propose a quantum dot based scheme for generation and detect…