Ancilla-Error-Transparent Controlled Beam Splitter Gate
arXiv:2112.04375 · doi:10.1088/2058-9565/ac760a
Abstract
In hybrid circuit QED architectures containing both ancilla qubits and bosonic modes, a controlled beam splitter gate is a powerful resource. It can be used to create (up to a controlled-parity operation) an ancilla-controlled SWAP gate acting on two bosonic modes. This is the essential element required to execute the `swap test' for purity, prepare quantum non-Gaussian entanglement and directly measure nonlinear functionals of quantum states. It also constitutes an important gate for hybrid discrete/continuous-variable quantum computation. We propose a new realization of a hybrid cSWAP utilizing `Kerr-cat' qubits -- anharmonic oscillators subject to strong two-photon driving. The Kerr-cat is used to generate a controlled-phase beam splitter (cPBS) operation. When combined with an ordinary beam splitter one obtains a controlled beam-splitter (cBS) and from this a cSWAP. The strongly biased error channel for the Kerr-cat has phase flips which dominate over bit flips. This yields important benefits for the cSWAP gate which becomes non-destructive and transparent to the dominate error. Our proposal is straightforward to implement and, based on currently existing experimental parameters, should achieve controlled beam-splitter gates with high fidelities comparable to current ordinary beam-splitter operations available in circuit QED.
References in corpus (71)
- Charge insensitive qubit design derived from the Cooper pair box
- QuTiP: An open-source Python framework for the dynamics of open quantum systems
- Circuit Quantum Electrodynamics
- A Quantum Engineer's Guide to Superconducting Qubits
- Quantum fingerprinting
- Observation of high coherence in Josephson junction qubits measured in a three-dimensional circuit QED architecture
- Quantum random access memory
- Resolving photon number states in a superconducting circuit
- Practical Quantum Error Mitigation for Near-Future Applications
- Propagating phonons coupled to an artificial atom
- Quantum transduction of optical photons from a superconducting qubit
- Quantum acoustics with superconducting qubits
- The Kerr-Cat Qubit: Stabilization, Readout, and Gates
- Quantum error correction of a qubit encoded in grid states of an oscillator
- Universal Quantum Estimator
- Direct estimations of linear and non-linear functionals of a quantum state
- Complete universal quantum gate set approaching fault-tolerant thresholds with superconducting qubits
- A quantum memory with near-millisecond coherence in circuit QED
- Circuit quantum acoustodynamics with surface acoustic waves
- Architectures for a quantum random access memory
- Engineering the quantum states of light in a Kerr-nonlinear resonator by two-photon driving
- Creation and control of multi-phonon Fock states in a bulk acoustic wave resonator
- Hybrid circuit cavity quantum electrodynamics with a micromechanical resonator
- Exponential suppression of bit-flips in a qubit encoded in an oscillator
- 3-Wave Mixing Josephson Dipole Element
- Bias-preserving gates with stabilized cat qubits
- Resolving the energy levels of a nanomechanical oscillator
- Fast Universal Control of an Oscillator with Weak Dispersive Coupling to a Qubit
- Adding control to arbitrary unknown quantum operations
- A quantum Fredkin gate
- Coherent oscillations inside a quantum manifold stabilized by dissipation
- Efficient multiphoton sampling of molecular vibronic spectra on a superconducting bosonic processor
- Stabilized Cat in Driven Nonlinear Cavity: A Fault-Tolerant Error Syndrome Detector
- Entangling Bosonic Modes via an Engineered Exchange Interaction
- Optimal purification of single qubits
- A Simple Proof that Toffoli and Hadamard are Quantum Universal
- On the robustness of bucket brigade quantum RAM
- Identification of symmetry-protected topological states on noisy quantum computers
- Measuring the Renyi entropy of a two-site Fermi-Hubbard model on a trapped ion quantum computer
- Life after charge noise: recent results with transmon qubits
- A device for feasible fidelity, purity, Hilbert-Schmidt distance and entanglement witness measurements
- Kerr-free three-wave mixing in superconducting quantum circuits
- Quantum machine learning over infinite dimensions
- Dynamics of Transmon Ionization
- Error-corrected gates on an encoded qubit
- Programmable interference between two microwave quantum memories
- Theoretical and Experimental Perspectives of Quantum Verification
- Fault tolerant resource estimation of quantum random-access memories
- Introduction to Quantum Gate Set Tomography
- Quantum Analog-Digital Conversion
- Engineering bilinear mode coupling in circuit QED: Theory and experiment
- Local probing of propagating acoustic waves in a gigahertz echo chamber
- Resilience of quantum random access memory to generic noise
- Universal Quantum Computing with Arbitrary Continuous-Variable Encoding
- Hybrid quantum computation gate with trapped ion system
- Quantum algorithm for visual tracking
- On the static effective Hamiltonian of a rapidly driven nonlinear system
- Entanglement spectroscopy with a depth-two quantum circuit
- Measurements of nanoresonator-qubit interactions in a hybrid quantum electromechanical system
- A Robust Quantum Random Access Memory
- Quantum Virtual Cooling
- Cavity-free vacuum-Rabi splitting in circuit quantum acoustodynamics
- Parallelising the Queries in Bucket Brigade Quantum RAM
- Cost function embedding and dataset encoding for machine learning with parameterized quantum circuits
- Designing Kerr Interactions for Quantum Information Processing via Counterrotating Terms of Asymmetric Josephson-Junction Loops
- Sharp tunneling peaks in a parametric oscillator: quantum resonances missing in the rotating wave approximation
- Protocol for implementing quantum nonparametric learning with trapped ions
- Modular Quantum Computation in a Trapped Ion System
- Bell-inequality violation with "thermal" radiation
- Quantum Mean Embedding of Probability Distributions
- Experimental SWAP test of infinite dimensional quantum states
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- Two-qubit operations for finite-energy Gottesman-Kitaev-Preskill encodings
- Ancilla-free continuous-variable SWAP test
- Out-of-distribution generalisation for learning quantum channels with low-energy coherent states
- Swap-test interferometry with biased ancilla noise
- Exact amplitudes of parametric processes in driven Josephson circuits
- Optical coupling control of isolated mechanical resonators