330 citations · 2.1k across the 52 of their papers we have counts for
40 papers · 1 filter
Integrability and Chaos via fractal analysis of Spectral Form Factors: Gaussian approximations and exact results
Lorenzo Campos Venuti, Jovan Odavić, Alioscia Hamma
It is well known that the spectral form factor (SFF) of a possibly degenerate many-body Hamiltonian can be identified with a planar random walk taking steps of unequal length. In t…
Non-stabilizerness and violations of CHSH inequalities
Stefano Cusumano, Lorenzo Campos Venuti, Simone Cepollaro +7
We study quantitatively the interplay between entanglement and non-stabilizer resources in violating the CHSH inequalities. We show that, while non-stabilizer resources are necessa…
Entanglement and Stabilizer entropies of random bipartite pure quantum states
Daniele Iannotti, Gianluca Esposito, Lorenzo Campos Venuti +1
The interplay between non-stabilizerness and entanglement in random states is a very rich arena of study for the understanding of quantum advantage and complexity. In this work, we…
Optimal Control for Closed and Open System Quantum Optimization
Lorenzo Campos Venuti, Domenico D'Alessandro, Daniel A. Lidar
We provide a rigorous analysis of the quantum optimal control problem in the setting of a linear combination of two noncommuting Hamiltonians and . This in…
Topological Protection of Coherence in Noisy Open Quantum Systems
Yu Yao, Henning Schlömer, Zhengzhi Ma +2
We consider topological protection mechanisms in dissipative quantum systems in the presence of quenched disorder, with the intent to prolong coherence times of qubits. The physica…
Quantum coherence and the localization transition
Georgios Styliaris, Namit Anand, Lorenzo Campos Venuti +1
A dynamical signature of localization in quantum systems is the absence of transport which is governed by the amount of coherence that configuration space states possess with respe…
Classifying quantum data by dissipation
Jeffrey Marshall, Lorenzo Campos Venuti, Paolo Zanardi
We investigate a general class of dissipative quantum circuit capable of computing arbitrary Conjunctive Normal Form (CNF) Boolean formulas. In particular, the clauses in a CNF for…
Error Reduction in Quantum Annealing using Boundary Cancellation: Only the End Matters
Lorenzo Campos Venuti, Daniel A. Lidar
The adiabatic theorem of quantum mechanics states that the error between an instantaneous eigenstate of a time-dependent Hamiltonian and the state given by quantum evolution of dur…
Accuracy of the adiabatic-impulse approximation for closed and open quantum systems
Michael Tomka, Lorenzo Campos Venuti, Paolo Zanardi
We study the adiabatic-impulse approximation (AIA) as a tool to approximate the time evolution of quantum states, when driven through a region of small gap. The AIA originates from…
Coherence generating power of quantum dephasing processes
Georgios Styliaris, Lorenzo Campos Venuti, Paolo Zanardi
We provide a quantification of the capability of various quantum dephasing processes to generate coherence out of incoherent states. The measures defined, admitting computable expr…
Noise suppression via generalized-Markovian processes
Jeffrey Marshall, Lorenzo Campos Venuti, Paolo Zanardi
It is by now well established that noise itself can be useful for performing quantum information processing tasks. We present results which show how one can effectively reduce the…
Quantum coherence generating power, maximally abelian subalgebras, and Grassmannian Geometry
Paolo Zanardi, Lorenzo Campos Venuti
We establish a direct connection between the power of a unitary map in -dimensions () to generate quantum coherence and the geometry of the set of maximal…
Topological Protection of Coherence in a Dissipative Environment
Lorenzo Campos Venuti, Zhengzhi Ma, Hubert Saleur +1
One dimensional topological insulators are characterized by edge states with exponentially small energies. According to one generalization of topological phases to non-Hermitian sy…
Measures of coherence generating power for quantum unital operations
Paolo Zanardi, Georgios Styliaris, Lorenzo Campos Venuti
Given an orthonormal basis in a -dimensional Hilbert space and a unital quantum operation acting on it one can define a non-linear mapping that associates to a…
Relaxation vs. adiabatic quantum steady state preparation: which wins?
Lorenzo Campos Venuti, Tameem Albash, Milad Marvian +2
Adiabatic preparation of the ground states of many-body Hamiltonians in the closed system limit is at the heart of adiabatic quantum computation, but in reality systems are always…
Coherence generating power of quantum unitary maps and beyond
Paolo Zanardi, Georgios Styliaris, Lorenzo Campos Venuti
Given a preferred orthonormal basis in the Hilbert space of a quantum system we define a measure of the coherence generating power of a unitary operation with respect to . T…
Modular Quantum Information Processing by Dissipation
Jeffrey Marshall, Lorenzo Campos Venuti, Paolo Zanardi
Dissipation can be used as a resource to control and simulate quantum systems. We discuss a modular model based on fast dissipation capable of performing universal quantum computat…
Dynamical Response Theory for Driven-Dissipative Quantum Systems
Lorenzo Campos Venuti, Paolo Zanardi
We discuss dynamical response theory of driven-dissipative quantum systems described by Markovian Master Equations generating semi-groups of maps. In this setting thermal equilibri…
The recurrence time in quantum mechanics
Lorenzo Campos Venuti
Generic quantum systems --as much as their classical counterparts-- pass arbitrarily close to their initial state after sufficiently long time. Here we provide an essentially exact…
Adiabaticity in open quantum systems
Lorenzo Campos Venuti, Tameem Albash, Daniel A. Lidar +1
We provide a rigorous generalization of the quantum adiabatic theorem for open systems described by a Markovian master equation with time-dependent Liouvillian . We…
Dissipative Universal Lindbladian Simulation
Paolo Zanardi, Jeffrey Marshall, Lorenzo Campos Venuti
It is by now well understood that quantum dissipative processes can be harnessed and turned into a resource for quantum-information processing tasks. In this paper we demonstrate y…
Geometry, robustness, and emerging unitarity in dissipation-projected dynamics
Paolo Zanardi, Lorenzo Campos Venuti
Quantum information can be encoded in the set of steady-states (SSS) of a driven-dissipative system. Non steady-states are separated by a large dissipative gap that adiabatically d…
Coherent control of non-Markovian photon-resonator dynamics
Anthony F. J. Levi, Lorenzo Campos Venuti, Tameem Albash +1
We study the unitary time evolution of photons interacting with a dielectric resonator using coherent control pulses. We show that non-Markovianity of transient photon dynamics in…
Evolution prediction from tomography
Jason M. Dominy, Lorenzo Campos Venuti, Alireza Shabani +1
Quantum process tomography provides a means of measuring the evolution operator for a system at a fixed measurement time . The problem of using that tomographic snapshot to pred…