Speed limits and locality in many-body quantum dynamics
We review the mathematical speed limits on quantum information processing in many-body
systems. After the proof of the Lieb–Robinson Theorem in 1972, the past two decades have …
systems. After the proof of the Lieb–Robinson Theorem in 1972, the past two decades have …
Lieb-Robinson light cone for power-law interactions
The Lieb-Robinson theorem states that information propagates with a finite velocity in
quantum systems on a lattice with nearest-neighbor interactions. What are the speed limits …
quantum systems on a lattice with nearest-neighbor interactions. What are the speed limits …
Transport and entanglement growth in long-range random Clifford circuits
Conservation laws can constrain entanglement dynamics in isolated quantum systems,
manifest in a slowdown of higher Rényi entropies. Here, we explore this phenomenon in a …
manifest in a slowdown of higher Rényi entropies. Here, we explore this phenomenon in a …
Effective light cone and digital quantum simulation of interacting bosons
The speed limit of information propagation is one of the most fundamental features in non-
equilibrium physics. The region of information propagation by finite-time dynamics is …
equilibrium physics. The region of information propagation by finite-time dynamics is …
Concentration for random product formulas
Quantum simulation has wide applications in quantum chemistry and physics. Recently,
scientists have begun exploring the use of randomized methods for accelerating quantum …
scientists have begun exploring the use of randomized methods for accelerating quantum …
Optimal state transfer and entanglement generation in power-law interacting systems
We present an optimal protocol for encoding an unknown qubit state into a multiqubit
Greenberger-Horne-Zeilinger-like state and, consequently, transferring quantum information …
Greenberger-Horne-Zeilinger-like state and, consequently, transferring quantum information …
Finite speed of quantum information in models of interacting bosons at finite density
We prove that quantum information propagates with a finite velocity in any model of
interacting bosons whose (possibly time-dependent) Hamiltonian contains spatially local …
interacting bosons whose (possibly time-dependent) Hamiltonian contains spatially local …
[PDF][PDF] Optimal light cone and digital quantum simulation of interacting bosons
A fundamental principle of many-body physics is causality: a strict prohibition of information
propagation outside the light cone. However, in non-relativistic systems, it is often unclear …
propagation outside the light cone. However, in non-relativistic systems, it is often unclear …
Operator growth bounds from graph theory
Let A and B be local operators in Hamiltonian quantum systems with N degrees of freedom
and finite-dimensional Hilbert space. We prove that the commutator norm‖[A (t), B]‖ is …
and finite-dimensional Hilbert space. We prove that the commutator norm‖[A (t), B]‖ is …
Frobenius light cone and the shift unitary
We bound the time necessary to implement the shift unitary on a one-dimensional ring, both
by using local Hamiltonians and those with power-law interactions. This time is constrained …
by using local Hamiltonians and those with power-law interactions. This time is constrained …