268 citations · 558 across the 15 of their papers we have counts for
18 papers
Architectural and Inferential Inductive Biases For Exchangeable Sequence Modeling
Daksh Mittal, Ang Li, Tzu-Ching Yen +2
Autoregressive models have emerged as a powerful framework for modeling exchangeable sequences - i.i.d. observations when conditioned on some latent factor - enabling direct modeli…
Quantum Measurement for Quantum Chemistry on a Quantum Computer
Smik Patel, Praveen Jayakumar, Tzu-Ching Yen +1
Quantum chemistry is among the most promising applications of quantum computing, offering the potential to solve complex electronic structure problems more efficiently than classic…
Online Label Shift: Optimal Dynamic Regret meets Practical Algorithms
Dheeraj Baby, Saurabh Garg, Tzu-Ching Yen +3
This paper focuses on supervised and unsupervised online label shift, where the class marginals varies but the class-conditionals remain invariant. In the unsupervi…
Extension of exactly-solvable Hamiltonians using symmetries of Lie algebras
Smik Patel, Tzu-Ching Yen, Artur F. Izmaylov
Exactly-solvable Hamiltonians that can be diagonalized using relatively simple unitary transformations are of great use in quantum computing. They can be employed for decomposition…
Assessment of various Hamiltonian partitionings for the electronic structure problem on a quantum computer using the Trotter approximation
Luis A. Martínez-Martínez, Tzu-Ching Yen, Artur F. Izmaylov
Solving the electronic structure problem via unitary evolution of the electronic Hamiltonian is one of the promising applications of digital quantum computers. One of the practical…
Improving quantum measurements by introducing "ghost" Pauli products
Seonghoon Choi, Tzu-Ching Yen, Artur F. Izmaylov
Reducing the number of measurements required to estimate the expectation value of an observable is crucial for the variational quantum eigensolver to become competitive with state-…
Fidelity overhead for non-local measurements in variational quantum algorithms
Zachary Pierce Bansingh, Tzu-Ching Yen, Peter D. Johnson +1
Measuring quantum observables by grouping terms that can be rotated to sums of only products of Pauli operators (Ising form) is proven to be efficient in near term quantum…
Deterministic improvements of quantum measurements with grouping of compatible operators, non-local transformations, and covariance estimates
Tzu-Ching Yen, Aadithya Ganeshram, Artur F. Izmaylov
Obtaining the expectation value of an observable on a quantum computer is a crucial step in the variational quantum algorithms. For complicated observables such as molecular electr…
Analytic gradients in variational quantum algorithms: Algebraic extensions of the parameter-shift rule to general unitary transformations
Artur F. Izmaylov, Robert A. Lang, Tzu-Ching Yen
Optimization of unitary transformations in Variational Quantum Algorithms benefits highly from efficient evaluation of cost function gradients with respect to amplitudes of unitary…
Tequila: A platform for rapid development of quantum algorithms
Jakob S. Kottmann, Sumner Alperin-Lea, Teresa Tamayo-Mendoza +15
Variational quantum algorithms are currently the most promising class of algorithms for deployment on near-term quantum computers. In contrast to classical algorithms, there are al…
How to define quantum mean-field solvable Hamiltonians using Lie algebras
Artur F. Izmaylov, Tzu-Ching Yen
Necessary and sufficient conditions for quantum Hamiltonians to be exactly solvable within mean-field theories have not been formulated so far. To resolve this problem, first, we d…
Cartan sub-algebra approach to efficient measurements of quantum observables
Tzu-Ching Yen, Artur F. Izmaylov
An arbitrary operator corresponding to a physical observable cannot be measured in a single measurement on currently available quantum hardware. To obtain the expectation value of…
Measuring all compatible operators in one series of a single-qubit measurements using unitary transformations
Tzu-Ching Yen, Vladyslav Verteletskyi, Artur F. Izmaylov
The Variational Quantum Eigensolver approach to the electronic structure problem on a quantum computer involves measurement of the Hamiltonian expectation value. Formally, quantum…
Unitary partitioning approach to the measurement problem in the Variational Quantum Eigensolver method
Artur F. Izmaylov, Tzu-Ching Yen, Robert A. Lang +1
To obtain estimates of electronic energies, the Variational Quantum Eigensolver (VQE) technique performs separate measurements for multiple parts of the system Hamiltonian. Current…
Measurement Optimization in the Variational Quantum Eigensolver Using a Minimum Clique Cover
Vladyslav Verteletskyi, Tzu-Ching Yen, Artur F. Izmaylov
Solving the electronic structure problem using the Variational Quantum Eigensolver (VQE) technique involves measurement of the Hamiltonian expectation value. Current hardware can p…
Exact and approximate symmetry projectors for the electronic structure problem on a quantum computer
Tzu-Ching Yen, Robert A. Lang, Artur F. Izmaylov
Solving the electronic structure problem on a universal-gate quantum computer within the variational quantum eigensolver (VQE) methodology requires constraining the search procedur…
Revising measurement process in the variational quantum eigensolver: Is it possible to reduce the number of separately measured operators?
Artur F. Izmaylov, Tzu-Ching Yen, Ilya G. Ryabinkin
Current implementations of the Variational Quantum Eigensolver (VQE) technique for solving the electronic structure problem involve splitting the system qubit Hamiltonian into part…
Qubit coupled-cluster method: A systematic approach to quantum chemistry on a quantum computer
Ilya G. Ryabinkin, Tzu-Ching Yen, Scott N. Genin +1
A unitary coupled-cluster (UCC) form for the wavefunction in the variational quantum eigensolver has been suggested as a systematic way to go beyond the mean-field approximation an…