543 citations · 4.3k across the 104 of their papers we have counts for
107 papers
Quantum parameter estimation with many-body fermionic systems and application to the Hall effect
Olivier Giraud, Mark-Oliver Goerbig, Daniel Braun
We calculate the quantum Fisher information for a generic many-body fermionic system in a pure state depending on a parameter. We discuss the situations where the parameter is impr…
Minimal-noise estimation of noncommuting rotations of a spin
Jakub Czartowski, Karol Życzkowski, Daniel Braun
We propose an analogue of interferometry to measure rotation of a spin by using two-spin squeezed states. Attainability of the Heisenberg limit for the estimation…
Principles of quantum functional testing
Nadia Milazzo, Olivier Giraud, Giovanni Gramegna +1
With increasing commercial availability of quantum information processing devices the need for testing them efficiently for their specified functionality will arise. Complete quant…
Majorization requires infinitely many second laws
Pedro Hack, Daniel A. Braun, Sebastian Gottwald
Majorization is a fundamental model of uncertainty with several applications in areas ranging from thermodynamics to entanglement theory, and constitutes one of the pillars of the…
Quantum metrology with a non-linear kicked Mach-Zehnder interferometer
Sabrina Müller, Daniel Braun
We study the sensitivity of a Mach-Zehnder interferometer that contains in addition to the phase shifter a non-linear element. By including both elements in a cavity or a loop that…
Stochastic emulation of quantum algorithms
Daniel Braun, Ronny Müller
Quantum algorithms profit from the interference of quantum states in an exponentially large Hilbert space and the fact that unitary transformations on that Hilbert space can be bro…