3 research outputs found
Swap Test-based Characterization of Quantum Processes in Universal Quantum Computers
Quantum Computing has been presenting major developments in the last few
years, unveiling systems with a increasing number of qubits. However,
unreliable quantum processes in universal quantum computers still represent one
of the the greatest challenges to be overcome. Such obstacle has its source on
noisy operations and interactions with the environment which introduce
decoherence to a quantum system. In this article we verify whether a tool
called Swap Test is able to identify decoherence. Our experimental results
demonstrate that the Swap Test can be employed as an alternative to a full
Quantum Process Tomography, with the advantage of not destroying the qubit
under test, under certain circumstances, as long as some modifications are
introduced
QUBO.jl: A Julia Ecosystem for Quadratic Unconstrained Binary Optimization
We present QUBO.jl, an end-to-end Julia package for working with QUBO
(Quadratic Unconstrained Binary Optimization) instances. This tool aims to
convert a broad range of JuMP problems for straightforward application in many
physics and physics-inspired solution methods whose standard optimization form
is equivalent to the QUBO. These methods include quantum annealing, quantum
gate-circuit optimization algorithms (Quantum Optimization Alternating Ansatz,
Variational Quantum Eigensolver), other hardware-accelerated platforms, such as
Coherent Ising Machines and Simulated Bifurcation Machines, and more
traditional methods such as simulated annealing. Besides working with
reformulations, QUBO.jl allows its users to interface with the aforementioned
hardware, sending QUBO models in various file formats and retrieving results
for subsequent analysis. QUBO.jl was written as a JuMP / MathOptInterface (MOI)
layer that automatically maps between the input and output frames, thus
providing a smooth modeling experience