2.3k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Interdisciplinary Centre for Security, Reliability and TrustLU193 papers
- Centre National de la Recherche ScientifiqueFR133 papers
- Luxembourg Institute of Science and TechnologyLU105 papers
- Donostia International Physics CenterES66 papers
- Forschungszentrum JülichDE37 papers
- Polish Academy of SciencesPL36 papers
- University of CambridgeGB36 papers
- Luxembourg Centre for Systems BiomedicineLU34 papers
- Technische Universität BerlinDE34 papers
- University of OttawaCA34 papers
- Université de LorraineFR31 papers
- University of LiègeBE30 papers
16 papers · 2 filters
Extensions of the Mandelstam-Tamm quantum speed limit to systems in mixed states
Niklas Hörnedal, Dan Allan, Ole Sönnerborn
The Mandelstam-Tamm quantum speed limit puts a bound on how fast a closed system in a pure state can evolve. In this paper, we derive several extensions of this quantum speed limit…
Probing quantum chaos in multipartite systems
Zan Cao, Zhenyu Xu, Adolfo del Campo
Understanding the emergence of quantum chaos in multipartite systems is challenging in the presence of interactions. We show that the contribution of the subsystems to the global b…
Variational principle for optimal quantum controls in quantum metrology
Jing Yang, Shengshi Pang, Zekai Chen +2
We develop a variational principle to determine the quantum controls and initial state which optimizes the quantum Fisher information, the quantity characterizing the precision in…
Quantum collisional thermostats
Jorge Tabanera, Ines Luque, Samuel L. Jacob +3
Collisional reservoirs are becoming a major tool for modelling open quantum systems. In their simplest implementation, an external agent switches on, for a given time, the interact…
Benchmarking quantum annealing dynamics: the spin-vector Langevin model
David Subires, Fernando J. Gómez-Ruiz, Antonia Ruiz-García +2
The classical spin-vector Monte Carlo (SVMC) model is a reference benchmark for the performance of a quantum annealer. Yet, as a Monte Carlo method, SVMC is unsuited for an accurat…
QKD parameter estimation by two-universal hashing
Dimiter Ostrev
This paper proposes and proves security of a QKD protocol which uses two-universal hashing instead of random sampling to estimate the number of bit flip and phase flip errors. This…
Unifying Quantum and Classical Speed Limits on Observables
Luis Pedro García-Pintos, Schuyler Nicholson, Jason R. Green +2
The presence of noise or the interaction with an environment can radically change the dynamics of observables of an otherwise isolated quantum system. We derive a bound on the spee…
Quantum scattering as a work source
Samuel L. Jacob, Massimiliano Esposito, Juan M. R. Parrondo +1
We consider a collision between a moving particle and a fixed system, each having internal degrees of freedom. We identify the regime where the motion of the particle acts as a wor…
Spectral Filtering Induced by Non-Hermitian Evolution with Balanced Gain and Loss: Enhancing Quantum Chaos
Julien Cornelius, Zhenyu Xu, Avadh Saxena +2
The dynamical signatures of quantum chaos in an isolated system are captured by the spectral form factor, which exhibits as a function of time a dip, a ramp, and a plateau, with th…
Digitized-counterdiabatic quantum approximate optimization algorithm
P. Chandarana, N. N. Hegade, K. Paul +4
The quantum approximate optimization algorithm (QAOA) has proved to be an effective classical-quantum algorithm serving multiple purposes, from solving combinatorial optimization p…
Spacetime effects on wavepackets of coherent light
David Edward Bruschi, Symeon Chatzinotas, Frank K. Wilhelm +1
We investigate the interplay between gravity and the quantum coherence present in the state of a pulse of light propagating in curved spacetime. We first introduce an operational w…
Uhlmann Fidelity and Fidelity Susceptibility for Integrable Spin Chains at Finite Temperature: Exact Results
Michał Białończyk, Fernando Javier Gómez-Ruiz, Adolfo del Campo
We derive the exact expression for the Uhlmann fidelity between arbitrary thermal Gibbs states of the quantum XY model in a transverse field with finite system size. Using it, we c…
Exact Delta Kick Cooling, Time-Optimal Control of Scale-Invariant Dynamics, and Shortcuts to Adiabaticity Assisted by Kicks
Léonce Dupays, David C. Spierings, Aephraim M. Steinberg +1
Delta kick cooling (DKC) is used to compress the momentum distribution of ultracold quantum matter. It combines expansion dynamics with the use of kick pulses, designed via classic…
First Law of Quantum Thermodynamics in a Driven Open Two-Level System
Adrián Juan-Delgado, Aurélia Chenu
Assigning the variations of internal energy into heat or work contributions is a challenging task due to the fact that these properties are trajectory dependent. A number of propos…
Super-Heisenberg scaling in Hamiltonian parameter estimation in the long-range Kitaev chain
Jing Yang, Shengshi Pang, Adolfo del Campo +1
In quantum metrology, nonlinear many-body interactions can enhance the precision of Hamiltonian parameter estimation to surpass the Heisenberg scaling. Here, we consider the estima…
Exact thermal properties of free-fermionic spin chains
Michał Białończyk, Fernando Javier Gómez-Ruiz, Adolfo del Campo
An exact description of integrable spin chains at finite temperature is provided using an elementary algebraic approach in the complete Hilbert space of the system. We focus on spi…