55 citations · 105 across the 14 of their papers we have counts for
16 papers
Practical Fidelity Estimation for Noisy Quantum Devices Using Direct and Survival-Probability-Based Protocols
Ahmed Aman, Kaustav Chatterjee, Younes Javanmard +1
Reliable characterization of quantum states and quantum processes is central to the development of scalable quantum computing. Standard characterization techniques such as full qua…
Biorthogonal Time-Dependent Variational Principle for Non-Hermitian Systems
Younes Javanmard, Sina Kazemian
We develop a biorthogonal time-dependent variational principle for real-time dynamics of non-Hermitian quantum many-body systems. Independent left and right matrix-product states o…
Closed Quantum Boltzmann Bridges: Coherent Revivals, Hidden Microstates, and the Emergence of Classical Two-Time Entropy Conditioning
Sina Kazemian, Ghazal Farhani, Younes Javanmard
The classical Boltzmann Bridge describes entropy histories conditioned on both an initial low-entropy macrostate and a later macrostate. Unlike the usual past-only formulation of t…
Boundary-Aware QFT Block-Encoding of Fractional Laplacians
Younes Javanmard, Sina Kazemian
We study the quantum Fourier transform (QFT) block-encoding of the semi-discrete fractional Laplacian on bounded domains with open, zero-extension boundary conditions. In the notat…
Compressing Transformer Language Models via Matrix Product Operator Decomposition: A Case Study on PicoGPT
Younes Javanmard, Tanmoy Pandit, Masoud Mardani
Transformer-based language models achieve strong performance across NLP tasks, but their quadratic parameter scaling with hidden dimension makes deployment on resource-constrained…
Coefficient-Decoupled Matrix Product Operators as an Interface to Linear-Combination-of-Unitaries Circuits
Younes Javanmard
We introduce a coefficient-decoupled matrix product operator (MPO) representation for Pauli-sum operators that separates reusable symbolic operator support from a tunable coefficie…
Quantum Markov chain Monte Carlo method with programmable quantum simulators
Mauro D'Arcangelo, Younes Javanmard, Natalie Pearson
In this work, we present a quantum Markov chain algorithm for many-body systems that utilizes a special phase of matter known as the Many-Body Localized (MBL) phase. We show how th…
Duality between string and computational order in symmetry-enriched topological phases
Paul Herringer, Vir B. Bulchandani, Younes Javanmard +2
We present the first examples of topological phases of matter with uniform power for measurement-based quantum computation. This is possible thanks to a new framework for analyzing…
Quantum search by measurements assisted by pre-trained tensor network states for Hamiltonian simulations
Younes Javanmard
We present a quantum algorithm for simulating complex many-body systems and finding their ground states, combining the use of tensor networks and density matrix renormalization gro…
Simulation of a Rohksar-Kivelson ladder on a NISQ device
Sabhyata Gupta, Younes Javanmard, Tobias J. Osborne +1
We present a quantum-classical algorithm to study the dynamics of the Rohksar-Kivelson plaquette ladder on NISQ devices. We show that complexity is largely reduced using gauge inva…
Matrix product state ansatz for the variational quantum solution of the Heisenberg model on Kagome geometries
Younes Javanmard, Ugne Liaubaite, Tobias J. Osborne +2
The Variational Quantum Eigensolver (VQE) algorithm, as applied to finding the ground state of a Hamiltonian, is particularly well-suited for deployment on noisy intermediate-scale…
Quantum simulation of dynamical phase transitions in noisy quantum devices
Younes Javanmard, Ugne Liaubaite, Tobias J. Osborne +1
Zero-noise extrapolation provides an especially useful error mitigation method for noisy intermediate-scale quantum devices. Our analysis, based on matrix product density operators…
Parity Quantum Optimization: Encoding Constraints
Maike Drieb-Schön, Kilian Ender, Younes Javanmard +1
Constraints make hard optimization problems even harder to solve on quantum devices because they are implemented with large energy penalties and additional qubit overhead. The pari…
Accessing eigenstate spin-glass order from reduced density matrices
Younes Javanmard, Soumya Bera, Markus Heyl
Many-body localized phases may not only be characterized by their ergodicity breaking, but can also host ordered phases such as the many-body localized spin-glass (MBL-SG). The MBL…
Sharp entanglement thresholds in the logarithmic negativity of disjoint blocks in the transverse-field Ising chain
Younes Javanmard, Daniele Trapin, Soumya Bera +2
Entanglement has developed into an essential concept for the characterization of phases and phase transitions in ground states of quantum many-body systems. In this work, we use th…
Interaction-tuned Anderson versus Mott localization
Andrey E. Antipov, Younes Javanmard, Pedro Ribeiro +1
Disorder or sufficiently strong interactions can render a metallic state unstable causing it to turn into an insulating one. Despite the fact that the interplay of these two routes…