32 citations · 254 across the 16 of their papers we have counts for
16 papers
Self-healing of Trotter error in digital adiabatic state preparation
Lucas K. Kovalsky, Fernando A. Calderon-Vargas, Matthew D. Grace +4
Adiabatic time evolution can be used to prepare a complicated quantum many-body state from one that is easier to synthesize and Trotterization can be used to implement such an evol…
Quantum circuit debugging and sensitivity analysis via local inversions
Fernando A. Calderon-Vargas, Timothy Proctor, Kenneth Rudinger +1
As the width and depth of quantum circuits implemented by state-of-the-art quantum processors rapidly increase, circuit analysis and assessment via classical simulation are becomin…
Dynamically corrected gates from geometric space curves
Edwin Barnes, Fernando A. Calderon-Vargas, Wenzheng Dong +3
Quantum information technologies demand highly accurate control over quantum systems. Achieving this requires control techniques that perform well despite the presence of decoherin…
Designing arbitrary single-axis rotations robust against perpendicular time-dependent noise
Bikun Li, F. A. Calderon-Vargas, Junkai Zeng +1
Low-frequency time-dependent noise is one of the main obstacles on the road towards a fully scalable quantum computer. The majority of solid-state qubit platforms, from superconduc…
Fast high-fidelity single-qubit gates for flip-flop qubits in silicon
Fernando A. Calderon-Vargas, Edwin Barnes, Sophia E. Economou
The flip-flop qubit, encoded in the states with antiparallel donor-bound electron and donor nuclear spins in silicon, showcases long coherence times, good controllability, and, in…
An adaptive quantum approximate optimization algorithm for solving combinatorial problems on a quantum computer
Linghua Zhu, Ho Lun Tang, George S. Barron +4
The quantum approximate optimization algorithm (QAOA) is a hybrid variational quantum-classical algorithm that solves combinatorial optimization problems. While there is evidence s…
Precise high-fidelity electron-nuclear spin entangling gates in NV centers via hybrid dynamical decoupling sequences
Wenzheng Dong, F. A. Calderon-Vargas, Sophia E. Economou
Color centers in solids, such as the nitrogen-vacancy center in diamond, offer well-protected and well-controlled localized electron spins that can be employed in various quantum t…
Fast noise-resistant control of donor nuclear spin qubits in silicon
James Simon, F. A. Calderon-Vargas, Edwin Barnes +1
A high degree of controllability and long coherence time make the nuclear spin of a phosphorus donor in isotopically purified silicon a promising candidate for a quantum bit. Howev…
Microwave-based Arbitrary CPHASE Gates for Transmon Qubits
George S. Barron, F. A. Calderon-Vargas, Junling Long +2
Superconducting transmon qubits are of great interest for quantum computing and quantum simulation. A key component of quantum chemistry simulation algorithms is breaking up the ev…
Fast high-fidelity entangling gates for spin qubits in Si double quantum dots
F. A. Calderon-Vargas, George S. Barron, Xiu-Hao Deng +3
Implementing high-fidelity two-qubit gates in single-electron spin qubits in silicon double quantum dots is still a major challenge. In this work, we employ analytical methods to d…
Negative exchange interactions in coupled few-electron quantum dots
Kuangyin Deng, F. A. Calderon-Vargas, Nicholas J. Mayhall +1
It has been experimentally shown that negative exchange interactions can arise in a linear three-dot system when a two-electron double quantum dot is exchange coupled to a larger q…
A robust operating point for capacitively coupled singlet-triplet qubits
M. A. Wolfe, F. A. Calderon-Vargas, J. P. Kestner
Singlet-triplet qubits in lateral quantum dots in semiconductor heterostructures exhibit high-fidelity single-qubit gates via exchange interactions and magnetic field gradients. Hi…
Entanglement dynamics of two Ising-coupled qubits with nonperpendicular local driving fields
F. A. Calderon-Vargas, J. P. Kestner
We present an approximate analytical solution to the dynamic equation of two Ising-coupled qubits with oscillating classical control fields that are nonperpendicular to the static…
Dynamically Correcting a CNOT Gate for any Systematic Logical Error
Fernando A. Calderon-Vargas, J. P. Kestner
We derive a set of composite pulse sequences that generates CNOT gates and correct all systematic errors within the logical subspace to arbitrary order. These sequences are applica…
Directly accessible entangling gates for capacitively coupled singlet-triplet qubits
Fernando A. Calderon-Vargas, Jason P. Kestner
The recent experimental advances in capacitively coupled singlet-triplet qubits, particularly the demonstration of entanglement, opens the question of what type of entangling gates…
Noise-compensating pulses for electrostatically controlled silicon spin qubits
Xin Wang, Fernando A. Calderon-Vargas, Muhed S. Rana +3
We study the performance of SUPCODE---a family of dynamically correcting pulses designed to cancel simultaneously both Overhauser and charge noise for singlet-triplet spin qubits--…