#quantum state tomography
6 papers match
The Keyl-Werner algorithm is not optimal for spectrum estimation
Angelos Pelecanos, Jack Spilecki, Ewin Tang +1
The paper presents a new algorithm that estimates the eigenvalues of a quantum state using fewer copies than the traditional Keyl‑Werner method, achieving constant error with O(d^2…
Demonstration of tripartite cat states in two distinct classes of entanglement
May Chee Loke, Jonathan Schwinger, Kehui Yu +4
The authors experimentally generate and characterize macroscopic tripartite entangled cat states of two inequivalent classes (GHZ-cat and W-cat) across three microwave resonators u…
An HHL-Based Quantum-Classical Solver for the Incompressible Navier-Stokes Equations with Approximate QST
Moshe Inger, Steven Frankel
The paper integrates the Harrow‑Hassidim‑Lloyd quantum linear solver with a discretized incompressible Navier‑Stokes formulation and uses an approximate quantum state tomography me…
Identifiability of Autonomous and Controlled Open Quantum Systems
Waqas Parvaiz, Johannes Aspman, Ales Wodecki +2
The paper studies how to determine (identify) the dynamics of autonomous and controlled open quantum systems by linking their master equations to classical linear and bilinear syst…
Fixed-Protocol Amortized MPS Tomography with Conformalized Predictive Uncertainty
Jian Xu, Delu Zeng, John Paisley +1
The paper introduces a fixed‑protocol amortized estimator for matrix‑product‑state quantum tomography that leverages an informative local Pauli measurement design and a gauge‑invar…
Optimal tomography of bosonic and fermionic Gaussian states
Senrui Chen, Marco Fanizza, Filippo Girardi +4
The paper determines the exact sample complexity for learning bosonic and fermionic Gaussian quantum states, showing that a number of copies scaling quadratically with the number o…