Quantinuum Ltd. (20250094848). Quantum Computing Systems and Methods for Quantum Computation
Quantum Computing Systems and Methods for Quantum Computation
Organization Name
Inventor(s)
Gabriel Francis Greene Diniz of London GB
David Zsolt Manrique of London GB
Quantum Computing Systems and Methods for Quantum Computation
This abstract first appeared for US patent application 20250094848 titled 'Quantum Computing Systems and Methods for Quantum Computation
Original Abstract Submitted
provided are computer-implemented quantum computation methods and systems that can be used to compute a green's function, such as for finite-sized fermionic hubbard models and related impurity models within dynamical mean field theory. the methods are suitable for implementation using a hybrid classical-quantum computation system. the green's function is an important quantity for describing optical and electronic responses in quantum systems, from which various properties and behaviours can be computed. described is a quantum computational method that involves a cumulant expansion of expectation values calculated for each of a set of moments of an operator. this reduces the need for a large overhead in the number of measurements and instead measures the expectation value of the moments with one set of measurement circuits. from the measured moments, a tridiagonal matrix can be computed, which in turn yields the green's function.
