499 citations · 1.9k across the 27 of their papers we have counts for
27 papers
QubiC 2.0: An Extensible Open-Source Qubit Control System Capable of Mid-Circuit Measurement and Feed-Forward
Yilun Xu, Gang Huang, Neelay Fruitwala +5
Researchers manipulate and measure quantum processing units via the classical electronics control system. We developed an open-source FPGA-based quantum bit control system called Q…
Extending the Computational Reach of a Superconducting Qutrit Processor
Noah Goss, Samuele Ferracin, Akel Hashim +5
Quantum computing with qudits is an emerging approach that exploits a larger, more-connected computational space, providing advantages for many applications, including quantum simu…
Stimulated emission of signal photons from dark matter waves
Ankur Agrawal, Akash V. Dixit, Tanay Roy +5
The manipulation of quantum states of light has resulted in significant advancements in both dark matter searches and gravitational wave detectors [1-4]. Current dark matter search…
Programmable Heisenberg interactions between Floquet qubits
Long B. Nguyen, Yosep Kim, Akel Hashim +9
The fundamental trade-off between robustness and tunability is a central challenge in the pursuit of quantum simulation and fault-tolerant quantum computation. In particular, many…
Benchmarking quantum logic operations relative to thresholds for fault tolerance
Akel Hashim, Stefan Seritan, Timothy Proctor +6
Contemporary methods for benchmarking noisy quantum processors typically measure average error rates or process infidelities. However, thresholds for fault-tolerant quantum error c…
Demonstrating scalable randomized benchmarking of universal gate sets
Jordan Hines, Marie Lu, Ravi K. Naik +12
Randomized benchmarking (RB) protocols are the most widely used methods for assessing the performance of quantum gates. However, the existing RB methods either do not scale to many…
Efficiently improving the performance of noisy quantum computers
Samuele Ferracin, Akel Hashim, Jean-Loup Ville +7
Using near-term quantum computers to achieve a quantum advantage requires efficient strategies to improve the performance of the noisy quantum devices presently available. We devel…
Optimized fermionic SWAP networks with equivalent circuit averaging for QAOA
Akel Hashim, Rich Rines, Victory Omole +6
The fermionic SWAP network is a qubit routing sequence that can be used to efficiently execute the Quantum Approximate Optimization Algorithm (QAOA). Even with a minimally-connecte…
Monitoring fast superconducting qubit dynamics using a neural network
G. Koolstra, N. Stevenson, S. Barzili +11
Weak measurements of a superconducting qubit produce noisy voltage signals that are weakly correlated with the qubit state. To recover individual quantum trajectories from these no…
High-fidelity three-qubit iToffoli gate for fixed-frequency superconducting qubits
Yosep Kim, Alexis Morvan, Long B. Nguyen +6
The development of noisy intermediate-scale quantum (NISQ) devices has extended the scope of executable quantum circuits with high-fidelity single- and two-qubit gates. Equipping N…
Hardware-Efficient Microwave-Activated Tunable Coupling Between Superconducting Qubits
Bradley K. Mitchell, Ravi K. Naik, Alexis Morvan +7
Generating high-fidelity, tunable entanglement between qubits is crucial for realizing gate-based quantum computation. In superconducting circuits, tunable interactions are often i…
Automatic Qubit Characterization and Gate Optimization with QubiC
Yilun Xu, Gang Huang, Jan Balewski +6
As the size and complexity of a quantum computer increases, quantum bit (qubit) characterization and gate optimization become complex and time-consuming tasks. Current calibration…
Leveraging Randomized Compiling for the QITE Algorithm
Jean-Loup Ville, Alexis Morvan, Akel Hashim +13
The success of the current generation of Noisy Intermediate-Scale Quantum (NISQ) hardware shows that quantum hardware may be able to tackle complex problems even without error corr…
Experimental Characterization of Crosstalk Errors with Simultaneous Gate Set Tomography
Kenneth Rudinger, Craig W. Hogle, Ravi K. Naik +11
Crosstalk is a leading source of failure in multiqubit quantum information processors. It can arise from a wide range of disparate physical phenomena, and can introduce subtle corr…
QubiC: An open source FPGA-based control and measurement system for superconducting quantum information processors
Yilun Xu, Gang Huang, Jan Balewski +6
As quantum information processors grow in quantum bit (qubit) count and functionality, the control and measurement system becomes a limiting factor to large scale extensibility. To…
Seamless high-Q microwave cavities for multimode circuit QED
Srivatsan Chakram, Andrew E. Oriani, Ravi K. Naik +5
Multimode cavity quantum electrodynamics ---where a two-level system interacts simultaneously with many cavity modes---provides a versatile framework for quantum information proces…
Multimode photon blockade
Srivatsan Chakram, Kevin He, Akash V. Dixit +7
Interactions are essential for the creation of correlated quantum many-body states. While two-body interactions underlie most natural phenomena, three- and four-body interactions a…
Randomized compiling for scalable quantum computing on a noisy superconducting quantum processor
Akel Hashim, Ravi K. Naik, Alexis Morvan +11
The successful implementation of algorithms on quantum processors relies on the accurate control of quantum bits (qubits) to perform logic gate operations. In this era of noisy int…
Searching for Dark Matter with a Superconducting Qubit
Akash V. Dixit, Srivatsan Chakram, Kevin He +4
Detection mechanisms for low mass bosonic dark matter candidates, such the axion or hidden photon, leverage potential interactions with electromagnetic fields, whereby the dark mat…
A tunable High-Q millimeter wave cavity for hybrid circuit and cavity QED experiments
Aziza Suleymanzade, Alexander Anferov, Mark Stone +3
The millimeter wave (mm-wave) frequency band provides exciting prospects for quantum science and devices, since many high-fidelity quantum emitters, including Rydberg atoms, molecu…
Deterministic Bidirectional Communication and Remote Entanglement Generation Between Superconducting Quantum Processors
N. Leung, Y. Lu, S. Chakram +6
We propose and experimentally demonstrate a simple and efficient scheme for photonic communication between two remote superconducting modules. Each module consists of a random acce…
Universal stabilization of a parametrically coupled qubit
Yao Lu, Srivatsan Chakram, Nelson Leung +7
We autonomously stabilize arbitrary states of a qubit through parametric modulation of the coupling between a fixed frequency qubit and resonator. The coupling modulation is achiev…
Realization of a system with metastable states of a capacitively-shunted fluxonium
Nathan Earnest, Srivatsan Chakram, Yao Lu +9
We realize a system in a superconducting circuit, with metastable states exhibiting lifetimes up to 8\,ms. We exponentially suppress the tunneling matrix elements involved in s…
Random access quantum information processors
R. K. Naik, N. Leung, S. Chakram +6
Qubit connectivity is an important property of a quantum processor, with an ideal processor having random access -- the ability of arbitrary qubit pairs to interact directly. Here,…