731 citations · 1.9k across the 36 of their papers we have counts for
37 papers
How NOT to build control-target gates in semiconductor quantum dots and beyond
Roman Korol, John Nichol, Ignacio Franco
Universal quantum computation requires single-qubit control together with at least one entangling two-qubit gate. CNOT and CROT gates are two famous examples of such gates, wherein…
Phase locking nuclear spins in silicon with spin-orbit coupling
Habitamu Y. Walelign, Manas Ranjan Sahu, John M. Nichol
Because they have such long coherence times, nuclear spins have extraordinary potential for use in quantum information processing devices. However, coherent nuclear spin control ge…
Stochastic trajectories and excursions in a double quantum dot system
Guilherme Fiusa, Pedro E. Harunari, Alberto J. B. Rosal +2
We investigate the trajectory-level stochastic dynamics of a double quantum dot system using the formalism of stochastic excursions. An excursion is a sub-trajectory that begins wh…
Measuring and correcting nanosecond pulse distortions in quantum-dot spin qubits
Jiheng Duan, Fernando Torres-Leal, John M. Nichol
Gate-defined semiconductor quantum dots utilize fast electrical control to manipulate spin and charge states of individual electrons. Electrical pulse distortions can limit control…
Spin qubit shuttling between coupled quantum dots with inhomogeneous Landé g-tensors
Zhi-Hai Liu, Xiao-Fei Liu, H. Q. Xu
By utilizing the site-dependent spin quantization axis in semiconductor quantum dot (QD) arrays, shuttling-based spin qubit gates have become an appealing approach to realize scala…
Multi-level charge fluctuations in a Si/SiGe double quantum dot device
Dylan Albrecht, Feiyang Ye, N. Tobias Jacobson +1
Discrete charge fluctuations, routinely observed in semiconductor quantum dot devices, may contribute significantly to device drift and errors resulting from qubit miscalibration.…
Pyroelectric effects in hybrid semiconductor-lithium niobate quantum devices
Manas Ranjan Sahu, Suraj Thapa Magar, Yadav Prasad Kandel +1
Hybrid quantum devices using surface acoustic waves show promise as key elements of quantum information processors. We report measurements of integrated flip-chip devices consistin…
Mitigating Residual Exchange Coupling in Resonant Singlet-Triplet Qubits
Jiheng Duan, Fernando Torres-Leal, John M. Nichol
We propose methods to mitigate single- and two-qubit control errors due to residual exchange coupling in systems of exchange-coupled resonant singlet-triplet qubits. Commensurate d…
Measuring pulse heating in Si quantum dots with individual two-level fluctuators
Feiyang Ye, Lokendra S. Dhami, John M. Nichol
To encode quantum information in semiconductor spin qubits, voltage pulses are necessary for initialization, gate operation, and readout. However, these pulses dissipate heat, shif…
Stabilizing an individual charge fluctuator in a Si/SiGe quantum dot
Feiyang Ye, Ammar Ellaboudy, John M. Nichol
Charge noise is a major obstacle to improved gate fidelities in silicon spin qubits. Numerous methods exist to mitigate charge noise, including improving device fabrication, dynami…
Magnetic Field Tolerant Superconducting Spiral Resonators for Circuit QED
M. Medahinne, Y. P. Kandel, S. Thapa Magar +3
We present spiral resonators of thin film niobium (Nb) that exhibit large geometric inductance, high critical magnetic fields and high single photon quality factors. These low loss…
Ballast charges for semiconductor spin qubits
Yujun Choi, John M. Nichol, Edwin Barnes
Semiconductor spin qubits are an attractive platform for quantum computing, but their performance is degraded primarily by fluctuating electromagnetic environments. We introduce th…
The formation of a nuclear-spin dark state in silicon
Xinxin Cai, Habitamu Y. Walelign, John M. Nichol
Silicon-based qubits are often made by trapping individual electrons in quantum dots defined by electric gates. Quantum information can then be stored using the spin states of the…
Characterization of individual charge fluctuators in Si/SiGe quantum dots
Feiyang Ye, Ammar Ellaboudy, Dylan Albrecht +3
Electron spins in silicon quantum dots are excellent qubits due to their long coherence times, scalability, and compatibility with advanced semiconductor technology. Although high…
Coherent Optical Coupling to Surface Acoustic Wave Devices
Arjun Iyer, Yadav P. Kandel, Wendao Xu +2
Surface acoustic waves (SAW) and associated SAW devices are ideal for sensing, metrology, and connecting and controlling hybrid quantum devices. While the advances demonstrated to…
High-impedance surface acoustic wave resonators
Yadav P. Kandel, Suraj Thapa Magar, Arjun Iyer +2
Because of their small size, low loss, and compatibility with magnetic fields and elevated temperatures, surface acoustic wave resonators hold significant potential as future quant…
Analog Quantum Simulation of the Dynamics of Open Quantum Systems with Quantum Dots and Microelectronic Circuits
Chang Woo Kim, John M. Nichol, Andrew N. Jordan +1
We introduce a general setup for the analog quantum simulation of the dynamics of open quantum systems based on semiconductor quantum dots electrically connected to a chain of quan…
Semiconductor Spin Qubits
Guido Burkard, Thaddeus D. Ladd, John M. Nichol +2
The spin degree of freedom of an electron or a nucleus is one of the most basic properties of nature and functions as an excellent qubit, as it provides a natural two-level system…
Coherent spin-valley oscillations in silicon
Xinxin Cai, Elliot J. Connors, John M. Nichol
Electron spins in silicon quantum dots are excellent qubits because they have long coherence times, high gate fidelities, and are compatible with advanced semiconductor manufacturi…
Charge-noise spectroscopy of Si/SiGe quantum dots via dynamically-decoupled exchange oscillations
Elliot J. Connors, JJ Nelson, Lisa F. Edge +1
Electron spins in silicon quantum dots are promising qubits due to their long coherence times, scalable fabrication, and potential for all-electrical control. However, charge noise…
Protecting Quantum Information in Quantum Dot Spin Chains by Driving Exchange Interactions Periodically
John S. Van Dyke, Yadav P. Kandel, Haifeng Qiao +3
Recent work has demonstrated a new route to discrete time crystal physics in quantum spin chains by periodically driving nearest-neighbor exchange interactions in gate-defined quan…
Long-Distance Superexchange between Semiconductor Quantum-Dot Electron Spins
Haifeng Qiao, Yadav P. Kandel, Saeed Fallahi +4
Because of their long coherence times and potential for scalability, semiconductor quantum-dot spin qubits hold great promise for quantum information processing. However, maintaini…
Adiabatic quantum state transfer in a semiconductor quantum-dot spin chain
Yadav P. Kandel, Haifeng Qiao, Saeed Fallahi +3
Semiconductor quantum-dot spin qubits are a promising platform for quantum computation, because they are scalable and possess long coherence times. In order to realize this full po…
Floquet-Enhanced Spin Swaps
Haifeng Qiao, Yadav P. Kandel, John S. Van Dyke +5
The transfer of information between quantum systems is essential for quantum communication and computation. In quantum computers, high connectivity between qubits can improve the e…