157 citations · 907 across the 28 of their papers we have counts for
28 papers
Precision quantum simulation of magnon spectra and interactions
Trond I. Andersen, Nikita Astrakhantsev, Jeronimo Martinez +329
Quantum simulation promises to advance materials discovery by accurately simulating complex states of matter, their microscopic excitations, and macroscopic response functions. The…
Stabilizing two-qubit entanglement with dynamically decoupled active feedback
Sacha Greenfield, Leigh Martin, Felix Motzoi +3
We propose and analyze a protocol for stabilizing a maximally entangled state of two noninteracting qubits using active state-dependent feedback from a continuous two-qubit half-pa…
Robust Hamiltonian Engineering for Interacting Qudit Systems
Hengyun Zhou, Haoyang Gao, Nathaniel T. Leitao +5
We develop a formalism for the robust dynamical decoupling and Hamiltonian engineering of strongly interacting qudit systems. Specifically, we present a geometric formalism that si…
Higher-Order Methods for Hamiltonian Engineering Pulse Sequence Design
Matthew Tyler, Hengyun Zhou, Leigh S. Martin +2
We introduce a framework for designing Hamiltonian engineering pulse sequences that systematically accounts for the effects of higher-order contributions to the Floquet-Magnus expa…
Robust Higher-Order Hamiltonian Engineering for Quantum Sensing with Strongly Interacting Systems
Hengyun Zhou, Leigh S. Martin, Matthew Tyler +4
Dynamical decoupling techniques constitute an integral part of many quantum sensing platforms, often leading to orders-of-magnitude improvements in coherence time and sensitivity.…
A Multi-Qubit Quantum Gate Using the Zeno Effect
Philippe Lewalle, Leigh S. Martin, Emmanuel Flurin +5
The Zeno effect, in which repeated observation freezes the dynamics of a quantum system, stands as an iconic oddity of quantum mechanics. When a measurement is unable to distinguis…
Controlling local thermalization dynamics in a Floquet-engineered dipolar ensemble
Leigh S. Martin, Hengyun Zhou, Nathaniel T. Leitao +9
Understanding the microscopic mechanisms of thermalization in closed quantum systems is among the key challenges in modern quantum many-body physics. We demonstrate a method to pro…
Demonstration of universal control between non-interacting qubits using the Quantum Zeno effect
Eliya Blumenthal, Chen Mor, Asaf A. Diringer +5
The Zeno effect occurs in quantum systems when a very strong measurement is applied, which can alter the dynamics in non-trivial ways. Despite being dissipative, the dynamics stay…
Continuous measurements for control of superconducting quantum circuits
Shay Hacohen-Gourgy, Leigh S. Martin
Developments over the last two decades have opened the path towards quantum technologies in many quantum systems, such as cold atoms, trapped ions, cavity-quantum electrodynamics (…
Quantum proportional-integral (PI) control
Hui Chen, Hanhan Li, Felix Motzoi +3
Feedback control is an essential component of many modern technologies and provides a key capability for emergent quantum technologies. We extend existing approaches of direct feed…
Quantum feedback for measurement and control
Leigh S. Martin
The standard quantum formalism introduced at the undergraduate level treats measurement as an instantaneous collapse. In reality however, no physical process can occur over a truly…
Single-shot deterministic entanglement between non-interacting systems with linear optics
Leigh S. Martin, K. Birgitta Whaley
Measurement-based heralded entanglement schemes have served as the primary link between physically separated qubits in most quantum information platforms. However, the impossibilit…
Optimality of feedback control for qubit purification under inefficient measurement
Yuxiao Jiang, Xiyue Wang, Leigh Martin +1
A quantum system may be purified, i.e., projected into a pure state, faster if one applies feedback operations during the measurement process. However existing results suggest that…
Implementation of a canonical phase measurement with quantum feedback
Leigh S. Martin, William P. Livingston, Shay Hacohen-Gourgy +2
Much of modern metrology and communication technology encodes information in electromagnetic waves, typically as an amplitude or phase. While current hardware can perform near-idea…
Using a Recurrent Neural Network to Reconstruct Quantum Dynamics of a Superconducting Qubit from Physical Observations
Emmanuel Flurin, Leigh S. Martin, Shay Hacohen-Gourgy +1
At its core, Quantum Mechanics is a theory developed to describe fundamental observations in the spectroscopy of solids and gases. Despite these practical roots, however, quantum t…
Locally optimal measurement-based quantum feedback with application to multi-qubit entanglement generation
Song Zhang, Leigh Martin, K. Birgitta Whaley
We present a general approach to measurement-based quantum feedback that employs proportional and quantum state-based (PaQS) feedback components to obtain locally optimal protocols…
Multi-time correlators in continuous measurement of qubit observables
Juan Atalaya, Shay Hacohen-Gourgy, Leigh S. Martin +2
We consider multi-time correlators for output signals from linear detectors, continuously measuring several qubit observables at the same time. Using the quantum Bayesian formalism…
Stroboscopic qubit measurement with squeezed illumination
Andrew Eddins, Sydney Schreppler, David M. Toyli +6
Microwave squeezing represents the ultimate sensitivity frontier for superconducting qubit measurement. However, observation of enhancement has remained elusive, in part because in…
Simultaneous continuous measurement of non-commuting observables: quantum state correlations
Areeya Chantasri, Juan Atalaya, Shay Hacohen-Gourgy +3
We consider the temporal correlations of the quantum state of a qubit subject to simultaneous continuous measurement of two non-commuting qubit observables. Such qubit state correl…
Incoherent qubit control using the quantum Zeno effect
Shay Hacohen-Gourgy, Luis Pedro García-Pintos, Leigh S. Martin +2
The quantum Zeno effect is the suppression of Hamiltonian evolution by repeated observation, resulting in the pinning of the state to an eigenstate of the measurement observable. U…
What is the optimal way to prepare a Bell state using measurement and feedback?
Leigh S. Martin, Mahrud Sayrafi, K. Birgitta Whaley
Recent work has shown that use of quantum feedback can significantly enhance both the speed and success rate of measurement-based remote entanglement generation, but it is generall…
Correlators in simultaneous measurement of non-commuting qubit observables
Juan Atalaya, Shay Hacohen-Gourgy, Leigh S. Martin +2
We consider the simultaneous and continuous measurement of qubit observables and , focusing on the temporal correlations of the two output signals. Using…
Observing Topological Invariants Using Quantum Walk in Superconducting Circuits
Emmanuel Flurin, Vinay V. Ramasesh, Shay Hacohen-Gourgy +3
The direct measurement of topological invariants in both engineered and naturally occurring quantum materials is a key step in classifying quantum phases of matter. Here we motivat…
Dynamics of simultaneously measured non-commuting observables
Shay Hacohen-Gourgy, Leigh S. Martin, Emmanuel Flurin +3
In quantum mechanics, measurements cause wavefunction collapse that yields precise outcomes, for non-commuting observables such as position and momentum Heisenberg's uncertainty pr…