# Apply

Discover how Boulder Opal can help you solve the toughest challenges across hardware systems with complete code-based solutions

## Superconducting systems

Learn how Boulder Opal can be applied to superconducting systems

### Learn to simulate with the superconducting system module

Engineering and simulating gates in superconducting transmon-cavity systems

### Design noise-robust single-qubit gates for IBM Qiskit

Increasing robustness against dephasing and control noise using Boulder Opal pulses

### Design noise-robust single-qubit gates for Rigetti Quil-T

Increasing robustness against control noise using Boulder Opal pulses

### Perform model-based robust optimization for the cross-resonance gate

Increasing robustness against crosstalk in a two-qubit entangling operation

### Demonstrate SU(3) gates on superconducting hardware

Hamiltonian-agnostic rapid tune-up of an arbitrary unitary on a qutrit

### Design fast optimal SNAP gates in superconducting resonators

Engineering fast, leakage-free gates in superconducting cavity-qubit systems

### Perform optimal Fock state generation in superconducting resonators

Engineering fast cavity state generation in superconducting cavity-qubit systems

### Design error-detectable entangling gates for superconducting resonators in dual-rail encoding

Robust $ZZ_\Theta$ gate with a transmon ancilla engineered using Boulder Opal

### Design error-robust digital SFQ controls for superconducting qubits

Generating single flux quantum gates robust to leakage and frequency drift

### Perform noise spectroscopy in superconducting hardware

Reconstructing noise power spectrum density in transmon qubits using dynamical decoupling sequences

## Trapped-ion quantum computing

Learn how Boulder Opal can be applied to trapped-ion quantum computing

### Learn to optimize Mølmer–Sørensen gates for trapped ions

Creating optimal operations with the trapped ions module

### How to calculate system dynamics for arbitrary Mølmer–Sørensen gates

Calculate the Mølmer–Sørensen gate evolution characteristics for trapped ions

### How to optimize Mølmer–Sørensen gates for a multitone global beam

Creating efficient gates for trapped ions without individually addressing the ions

### How to optimize error-robust Mølmer–Sørensen gates for trapped ions

Efficient state preparation using Mølmer–Sørensen-type interactions

### Design robust, configurable, parallel gates for large trapped-ion arrays

Obtaining control solutions for parallel and specifiable multi-qubit gates using Boulder Opal pulses

### Design robust Mølmer–Sørensen gates with parametric trap drive amplification

Obtaining control solutions for two-qubit gates with modulation of the confining potential

## Rydberg-atom quantum computing

Learn how Boulder Opal can be applied to Rydberg-atom quantum computing

### Generate highly-entangled states in large Rydberg-atom arrays

Generating high-fidelity GHZ states using Boulder Opal pulses

### Design robust Rydberg blockade two-qubit gates in cold atoms

Using Boulder Opal to improve two-qubit controlled-Z gates for cold atoms

### Improve Z2 state generation by 3X on QuEra's Aquila QPU

Deployment of Boulder Opal optimal pulses to increase the fidelity of state preparation in a cold atom cloud quantum computer hardware

## Spin-qubit quantum computing

Learn how Boulder Opal can be applied to spin-qubit quantum computing

## Quantum sensing

Learn how Boulder Opal can be applied to quantum sensing

### Design robust pulses for widefield microscopy with NV centers

Increasing detection area by $>10\times$ using $\pi$ pulses robust to field inhomogeneities across large diamond chips

### Perform narrow-band magnetic-field spectroscopy with NV centers

Using Boulder Opal spectrum reconstruction tools to perform provably optimal leakage-free sensing with spectrally concentrated Slepian pulses

### Boost signal-to-noise by 10X in cold-atom sensors using robust control

Using Boulder Opal robust Raman pulses to boost fringe contrast in tight-SWAP cold atom interferometers by an order of magnitude