7 papers
Tight bounds on recurrence time in closed quantum systems
Marcin Kotowski, MichaÅ Oszmaniec
The evolution of an isolated quantum system inevitably exhibits recurrence: the state returns to the vicinity of its initial condition after finite time. Despite its fundamental na…
Classical simulation of free-fermionic dynamics and quantum chemistry with magic input
Changhun Oh, MichaÅ Oszmaniec, Oliver Reardon-Smith +1
Establishing the precise computational boundary between classically tractable fermionic systems and those capable of genuine quantum advantage is a central challenge in quantum sim…
General framework for anticoncentration and linear cross-entropy benchmarking in photonic quantum advantage experiments
Zoltán Kolarovszki, Ãgoston Kaposi, Zoltán Zimborás +1
Photonic architectures are one of the leading platforms for demonstrating quantum computational advantage, with Boson Sampling and Gaussian Boson Sampling as the primary schemes. Y…
Generative modeling with Gaussian Boson Sampling: classically trainable Bosonic Born Machines
Zoltán Kolarovszki, Bence Bakó, MichaŠOszmaniec +2
Quantum generative modeling has emerged as a promising application of quantum computers, aiming to model complex probability distributions beyond the reach of classical methods. In…
Optimal Fermionic Joint Measurements for Estimating Non-Commuting Majorana Observables
Daniel McNulty, Susane Calegari, MichaÅ Oszmaniec
An important class of fermionic observables, relevant in tasks such as fermionic partial tomography and estimating energy levels of chemical Hamiltonians, are the binary measuremen…
A Simple and Efficient Joint Measurement Strategy for Estimating Fermionic Observables and Hamiltonians
Joanna Majsak, Daniel McNulty, MichaÅ Oszmaniec
We propose a simple scheme to estimate fermionic observables and Hamiltonians relevant in quantum chemistry and correlated fermionic systems. Our approach is based on implementing…