Speed limits and locality in many-body quantum dynamics

CFA Chen, A Lucas, C Yin - Reports on Progress in Physics, 2023 - iopscience.iop.org
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 …

A race-track trapped-ion quantum processor

SA Moses, CH Baldwin, MS Allman, R Ancona… - Physical Review X, 2023 - APS
We describe and benchmark a new quantum charge-coupled device (QCCD) trapped-ion
quantum computer based on a linear trap with periodic boundary conditions, which …

Non-Abelian topological order and anyons on a trapped-ion processor

M Iqbal, N Tantivasadakarn, R Verresen, SL Campbell… - Nature, 2024 - nature.com
Non-Abelian topological order is a coveted state of matter with remarkable properties,
including quasiparticles that can remember the sequence in which they are exchanged …

Midcircuit Operations Using the omg Architecture in Neutral Atom Arrays

JW Lis, A Senoo, WF McGrew, F Rönchen, A Jenkins… - Physical Review X, 2023 - APS
Midcircuit operations, such as qubit state measurement or reset, are central to many tasks in
quantum information science, including quantum computing, entanglement generation, and …

Efficient long-range entanglement using dynamic circuits

E Bäumer, V Tripathi, DS Wang, P Rall, EH Chen… - PRX Quantum, 2024 - APS
Quantum simulation traditionally relies on unitary dynamics, inherently imposing efficiency
constraints on the generation of intricate entangled states. In principle, these limitations can …

Topological order from measurements and feed-forward on a trapped ion quantum computer

M Iqbal, N Tantivasadakarn, TM Gatterman… - Communications …, 2024 - nature.com
Quantum systems evolve in time in one of two ways: through the Schrödinger equation or
wavefunction collapse. So far, deterministic control of quantum many-body systems in the …

Hierarchy of topological order from finite-depth unitaries, measurement, and feedforward

N Tantivasadakarn, A Vishwanath, R Verresen - PRX Quantum, 2023 - APS
Long-range entanglement—the backbone of topologically ordered states—cannot be
created in finite time using local unitary circuits, or, equivalently, adiabatic state preparation …

Midcircuit measurements on a single-species neutral alkali atom quantum processor

TM Graham, L Phuttitarn, R Chinnarasu, Y Song… - Physical Review X, 2023 - APS
We demonstrate midcircuit measurements in a neutral atom array by shelving data qubits in
protected hyperfine-Zeeman substates while nondestructively measuring an ancilla qubit …

A dual-species Rydberg array

S Anand, CE Bradley, R White, V Ramesh, K Singh… - Nature Physics, 2024 - nature.com
Large-scale Rydberg atom arrays are used for highly coherent analogue quantum
simulations and for digital quantum computations. However, advanced quantum protocols …

Preparation of matrix product states with log-depth quantum circuits

D Malz, G Styliaris, ZY Wei, JI Cirac - Physical Review Letters, 2024 - APS
We consider the preparation of matrix product states (MPS) on quantum devices via
quantum circuits of local gates. We first prove that faithfully preparing translation-invariant …