138 citations · 538 across the 23 of their papers we have counts for
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Symmetries of Pauli Noise from Lindbladian Dynamics
Moein Malekakhlagh, Edward H. Chen, Luke C. G. Govia +1
Characterizing noise in quantum circuits is fundamentally limited by gauge degrees of freedom; certain parameters, such as the individual contributions of state preparation and mea…
Single snapshot non-Markovianity of Pauli channels
Alireza Seif, Moein Malekakhlagh, Swarnadeep Majumder +1
Pauli channels are widely used to describe errors in quantum computers, particularly when noise is shaped via Pauli twirling. A common assumption is that such channels admit a Mark…
Large-scale Lindblad learning from time-series data
Ewout van den Berg, Brad Mitchell, Ken Xuan Wei +1
Learned open-quantum-system models have broad applications in device characterization, device calibration, realistic noise model construction, and bounding observable estimates in…
Distilled remote entanglement between superconducting qubits across optical channels
Nicolas Dirnegger, Moein Malekakhlagh, Vikesh Siddhu +5
A promising quantum computing architecture comprises modules of superconducting quantum processors linked via optical channels using quantum transducers. As quantum transducer hard…
Efficient Lindblad synthesis for noise model construction
Moein Malekakhlagh, Alireza Seif, Daniel Puzzuoli +2
Effective noise models are essential for analyzing and understanding the dynamics of quantum systems, particularly in applications like quantum error mitigation and correction. How…
Randomized benchmarking of a high-fidelity remote CNOT gate over a meter-scale microwave interconnect
Kentaro Heya, Timothy Phung, Moein Malekakhlagh +8
High-fidelity, meter-scale microwave interconnects between superconducting quantum processor modules are a key technology for extending system size beyond constraints imposed by de…
Entanglement-enhanced learning of quantum processes at scale
Alireza Seif, Senrui Chen, Swarnadeep Majumder +6
Learning unknown processes affecting a quantum system reveals underlying physical mechanisms and enables suppression, mitigation, and correction of unwanted effects. Describing a g…
Suppressing Correlated Noise in Quantum Computers via Context-Aware Compiling
Alireza Seif, Haoran Liao, Vinay Tripathi +5
Coherent errors, and especially those that occur in correlation among a set of qubits, are detrimental for large-scale quantum computing. Correlations in noise can occur as a resul…
Enhanced Quantum State Transfer and Bell State Generation over Long-Range Multimode Interconnects via Superadiabatic Transitionless Driving
Moein Malekakhlagh, Timothy Phung, Daniel Puzzuoli +3
Achieving high-fidelity direct two-qubit gates over meter-scale long quantum interconnects is challenging in part due to the multimode nature of such systems. One alternative schem…
Three-qubit Parity Gate via Simultaneous Cross Resonance Drives
Toshinari Itoko, Moein Malekakhlagh, Naoki Kanazawa +1
Native multi-qubit parity gates have various potential quantum computing applications, such as entanglement creation, logical state encoding and parity measurement in quantum error…
Floquet Analysis of Frequency Collisions
Kentaro Heya, Moein Malekakhlagh, Seth Merkel +2
Implementation of high-fidelity gate operations on integrated-qubit systems is of vital importance for fault-tolerant quantum computation. Qubit frequency allocation is an essentia…
Algorithms for perturbative analysis and simulation of quantum dynamics
Daniel Puzzuoli, Sophia Fuhui Lin, Moein Malekakhlagh +3
We develop general purpose algorithms for computing and utilizing both the Dyson series and Magnus expansion, with the goal of facilitating numerical perturbative studies of quantu…
Time-dependent Schrieffer-Wolff-Lindblad Perturbation Theory: measurement-induced dephasing and second-order Stark shift in dispersive readout
Moein Malekakhlagh, Easwar Magesan, Luke C. G. Govia
We develop a time-dependent Schrieffer-Wolff-Lindblad perturbation theory to study effective interactions for driven open quantum systems. The starting point of our analysis is a g…
Optimization of the resonator-induced phase gate for superconducting qubits
Moein Malekakhlagh, William Shanks, Hanhee Paik
The resonator-induced phase gate is a two-qubit operation in which driving a bus resonator induces a state-dependent phase shift on the qubits equivalent to an effective inter…
Mitigating off-resonant error in the cross-resonance gate
Moein Malekakhlagh, Easwar Magesan
Off-resonant error for a driven quantum system refers to interactions due to the input drives having non-zero spectral overlap with unwanted system transitions. For the cross-reson…
First-principles analysis of cross-resonance gate operation
Moein Malekakhlagh, Easwar Magesan, David C. McKay
We present a comprehensive theoretical study of the cross-resonance gate operation covering estimates for gate parameters and gate error as well as analyzing spectator qubits and m…
Lifetime renormalization of driven weakly anharmonic superconducting qubits: II. The readout problem
Alexandru Petrescu, Moein Malekakhlagh, Hakan E. Türeci
Recent experiments in superconducting qubit systems have shown an unexpectedly strong dependence of the qubit relaxation rate on the readout drive power. This phenomenon limits the…
Lifetime renormalization of weakly anharmonic superconducting qubits: I. Role of number non-conserving terms
Moein Malekakhlagh, Alexandru Petrescu, Hakan E. Türeci
The dynamics of a weakly anharmonic superconducting qubit in a complex electromagnetic environment is generally well-described by an effective multimode Kerr Hamiltonian at suffici…
Quantum Rabi Model with Two-Photon Relaxation
Moein Malekakhlagh, Alejandro W. Rodriguez
We study a cavity-QED setup consisting of a two-level system coupled to a single cavity mode with two-photon relaxation. The system dynamics is modeled via a Lindblad master equati…
Heisenberg-Langevin Formalism For Open Circuit-QED Systems
Moein Malekakhlagh
We present a Heisenberg-Langevin formalism to study the effective dynamics of a superconducting qubit coupled to an open multimode resonator, without resorting to the rotating wave…
Cutoff-free Circuit Quantum Electrodynamics
Moein Malekakhlagh, Alexandru Petrescu, Hakan E. Türeci
Any quantum-confined electronic system coupled to the electromagnetic continuum is subject to radiative decay and renormalization of its energy levels. When coupled to a cavity, th…
Non-Markovian dynamics of a superconducting qubit in an open multimode resonator
Moein Malekakhlagh, Alexandru Petrescu, Hakan E. Türeci
We study the dynamics of a transmon qubit that is capacitively coupled to an open multimode superconducting resonator. Our effective equations are derived by eliminating resonator…
Beyond Strong Coupling in a Massively Multimode Cavity
Neereja M. Sundaresan, Yanbing Liu, Darius Sadri +5
The study of light-matter interaction has seen a resurgence in recent years, stimulated by highly controllable, precise, and modular experiments in cavity quantum electrodynamics (…