151 citations · 808 across the 19 of their papers we have counts for
19 papers
Separate and efficient characterization of state-preparation and measurement errors using single-qubit operations
Muhammad Qasim Khan, Leigh M. Norris, Lorenza Viola
In many platforms, errors from state-preparation and measurement (SPAM) dominate over single-qubit gate errors. To inform further hardware improvements and the development of more…
SPAM-Robust Multi-axis Quantum Noise Spectroscopy in Temporally Correlated Environments
Muhammad Qasim Khan, Wenzheng Dong, Leigh M. Norris +1
Characterizing temporally correlated (``non-Markovian'') noise is a key prerequisite for achieving noise-tailored error mitigation and optimal device performance. Quantum noise spe…
Provably Optimal Control for Multiplicative Amplitude Control Noise
Colin J. Trout, Kevin Schultz, Paraj Titum +3
We provide a technique to obtain provably optimal control sequences for quantum systems under the influence of time-correlated multiplicative control noise. Utilizing the circuit-l…
Quantum Control Noise Spectroscopy with Optimal Suppression of Dephasing
Vivian Maloney, Yasuo Oda, Gregory Quiroz +2
We extend quantum noise spectroscopy (QNS) of amplitude control noise to settings where dephasing noise or detuning errors make significant contributions to qubit dynamics. Previou…
Frequency estimation under non-Markovian spatially correlated quantum noise: Restoring superclassical precision scaling
Francisco Riberi, Leigh M. Norris, Felix Beaudoin +1
We study the estimation precision attainable by entanglement-enhanced Ramsey interferometry in the presence of spatiotemporally correlated non-classical noise. Our analysis relies…
Frame-Based Filter-Function Formalism for Quantum Characterization and Control
Teerawat Chalermpusitarak, Behnam Tonekaboni, Yuanlong Wang +3
We introduce a theoretical framework for resource-efficient characterization and control of non-Markovian open quantum systems, which naturally allows for the integration of given,…
Two-qubit spectroscopy of spatiotemporally correlated quantum noise in superconducting qubits
Uwe von Lüpke, Félix Beaudoin, Leigh M. Norris +9
Noise that exhibits significant temporal and spatial correlations across multiple qubits can be especially harmful to both fault-tolerant quantum computation and quantum-enhanced m…
Simultaneous spectral estimation of dephasing and amplitude noise on a qubit sensor via optimally band-limited control
Virginia Frey, Leigh M. Norris, Lorenza Viola +1
The fragility of quantum systems makes them ideally suited for sensing applications at the nanoscale. However, interpreting the output signal of a qubit-based sensor is generally c…
Extending comb-based spectral estimation to multiaxis quantum noise
Gerardo A. Paz-Silva, Leigh M. Norris, Félix Beaudoin +1
We show how to achieve full spectral characterization of general multiaxis additive noise. Our pulsed spectral estimation technique is based on sequence repetition and frequency-co…
Non-Gaussian noise spectroscopy with a superconducting qubit sensor
Youngkyu Sung, Félix Beaudoin, Leigh M. Norris +9
Accurate characterization of the noise influencing a quantum system of interest has far-reaching implications across quantum science, ranging from microscopic modeling of decoheren…
Squeezing the angular momentum of an ensemble of complex multi-level atoms
Daniel Hemmer, Enrique Montano, Ben Q. Baragiola +4
Squeezing of collective atomic spins has been shown to improve the sensitivity of atomic clocks and magnetometers to levels significantly below the standard quantum limit. In most…
Ramsey Interferometry in Correlated Quantum Noise Environments
Félix Beaudoin, Leigh M. Norris, Lorenza Viola
We quantify the impact of spatio-temporally correlated Gaussian quantum noise on frequency estimation by Ramsey interferometry. While correlations in a classical noise environment…
Optimally band-limited spectroscopy of control noise using a qubit sensor
Leigh M. Norris, Dennis Lucarelli, Virginia M. Frey +3
Classical control noise is ubiquitous in qubit devices, making its accurate spectral characterization essential for designing optimized error suppression strategies at the physical…
Application of optimal band-limited control protocols to quantum noise sensing
V. M. Frey, S. Mavadia, L. M. Norris +4
Industrial, metrological, and medical applications provide a strong technological pull for advanced nanoscale sensors exploiting the unique sensitivity of quantum coherent systems…
Multiqubit Spectroscopy of Gaussian Quantum Noise
Gerardo A. Paz-Silva, Leigh M. Norris, Lorenza Viola
We introduce multi-pulse quantum noise spectroscopy protocols for spectral estimation of the noise affecting multiple qubits coupled to Gaussian dephasing environments including bo…
Qubit noise spectroscopy for non-Gaussian dephasing environments
Leigh M. Norris, Gerardo A. Paz-Silva, Lorenza Viola
We introduce open-loop quantum control protocols for characterizing the spectral properties of non-Gaussian noise, applicable to both classical and quantum dephasing environments.…
Internal Spin Control, Squeezing and Decoherence in Ensembles of Alkali Atomic Spins
Leigh M. Norris
This dissertation studies spin squeezing, entanglement and decoherence in large ensembles of cold, trapped alkali atoms with hyperfine spin f interacting with optical fields. Restr…
Three-dimensional light-matter interface for collective spin squeezing in atomic ensembles
Ben Q. Baragiola, Leigh M. Norris, Enrique Montano +3
We study the three-dimensional nature of the quantum interface between an ensemble of cold, trapped atomic spins and a paraxial laser beam, coupled through a dispersive interaction…
Enhanced squeezing of a collective spin via control of its qudit subsystems
Leigh M. Norris, Collin M. Trail, Poul S. Jessen +1
Unitary control of qudits can improve the collective spin squeezing of an atomic ensemble. Preparing the atoms in a state with large quantum fluctuations in magnetization strengthe…