7 papers
Beyond the lemon: Spectra of random Lindblad operators with a Hamiltonian component
Mykhailo Hontarenko, Wojciech Tarnowski, Sergey Denisov +1
Generators of continuous-time quantum Markovian evolution, known as Lindblad operators, play a key role in the theory of open quantum systems. The question of how to define and cha…
Error accumulation in dissipative quantum circuits
Nadir Samos-Sáenz de Buruaga, Rodrigo M. C. Pereira, Karol Życzkowski +2
Present-day quantum processors are open systems in which dissipation and decoherence degrade the information carried by a quantum state as it propagates through a circuit. We study…
Experimental Detection of Dissipative Quantum Chaos
Kristian Wold, Zitian Zhu, Feitong Jin +13
More than four decades of research on chaos in isolated quantum systems have led to the identification of universal signatures -- such as level repulsion and eigenstate thermalizat…
Quantum Liouvillian Tomography
Diogo Aguiar, Kristian Wold, Sergey Denisov +1
Characterization of near-term quantum computing platforms requires the ability to capture and quantify dissipative effects. This is an inherently challenging task, as these effects…
Spectral delineation of Markov Generators: Classical vs Quantum
Dariusz Chruściński, Sergey Denisov, Wojciech Tarnowski +1
The celebrated theorem of Perron and Frobenius implies that spectra of classical Markov operators, represented by stochastic matrices, are restricted to the unit disk. This propert…
Dissipation-Induced Threshold on Integrability Footprints
Rodrigo M. C. Pereira, Nadir Samos Sáenz de Buruaga, Kristian Wold +4
The presence of a dissipative environment substantially disrupts unitary evolution. Nevertheless, key features of the evolution, such as its integrable or chaotic nature, are not i…
Spectra of noisy parameterized quantum circuits: Single-Ring universality
Kristian Wold, Pedro Ribeiro, Sergey Denisov
Random unitaries are an important resource for quantum information processing. While their universal properties have been thoroughly analyzed, it is not known what happens to these…