Universal quantum computing with thermal state bosonic systems
arXiv:1812.04154 · doi:10.1103/PhysRevA.99.032345
Abstract
Recent development of mixed-state encoding (MSE) allows pure-state logical information to be encoded by a bosonic (continuous-variable) system in mixed physical state. Despite interest due to its counter-intuitiveness, the utility of the current MSE scheme is limited due to several operational drawbacks, namely redundant information carrier, probabilistic initialisation, and requirement of discrete-variable measurement. In this work, we present a simplified MSE that does not suffer from any of these drawbacks. Specifically, our protocol encodes each qubit by only one mixed-state bosonic mode, and the logical basis can be deterministically initialised from thermal equilibrium. All logical operations of this encoding can be performed with continuous-variable interaction and measurement only. Without the necessity of ground state cooling, our proposal could broaden the set of candidate systems for implementing quantum computers, and reduce the reliance on demanding refrigerating facility for current quantum computing architectures. Additionally, our protocol can enhance the noise tolerance of logical qubit even if the system can be efficiently cooled.
arXiv commentUpdated references, close to published version
References in corpus (54)
- Quantum Machine Learning
- Quantum information with continuous variables
- Gaussian Quantum Information
- Quantum Computing
- Surface codes: Towards practical large-scale quantum computation
- Quantum Simulation
- Review article: Linear optical quantum computing
- The nitrogen-vacancy colour centre in diamond
- The Physical Implementation of Quantum Computation
- Measurement-based quantum computation with cluster states
- Encoding a qubit in an oscillator
- Quantum computing with trapped ions
- Quantum computation over continuous variables
- Measurement-based quantum computation
- Universal Quantum Computation with Continuous-Variable Cluster States
- A Theory of Quantum Error-Correcting Codes
- Quantum computation with optical coherent states
- Topological fault-tolerance in cluster state quantum computation
- Dynamically protected cat-qubits: a new paradigm for universal quantum computation
- Roads towards fault-tolerant universal quantum computation
- Ultra-Large-Scale Continuous-Variable Cluster States Multiplexed in the Time Domain
- Theory of Decoherence-Free Fault-Tolerant Universal Quantum Computation
- High threshold universal quantum computation on the surface code
- Hybrid quantum information processing
- A Simple Quantum Computer
- Mechanical systems in the quantum regime
- New class of quantum error-correcting codes for a bosonic mode
- Hybrid Quantum Processors: molecular ensembles as quantum memory for solid state circuits
- Encoding Electronic Spectra in Quantum Circuits with Linear T Complexity
- Fault-Tolerant Measurement-Based Quantum Computing with Continuous-Variable Cluster States
- Quantum algorithms for algebraic problems
- Implementing a Universal Gate Set on a Logical Qubit Encoded in an Oscillator
- Performance and structure of single-mode bosonic codes
- Fault-tolerant linear optical quantum computing with small-amplitude coherent states
- Hardware-efficient autonomous quantum error correction
- Quantum computing with an electron spin ensemble
- Harnessing electro-optic correlations in an efficient mechanical converter
- Generation of one-million-mode continuous-variable cluster state by unlimited time-domain multiplexing
- Bosonic Quantum Codes for Amplitude Damping
- Stabilizing Quantum Information
- Reaching 10 ms single photon lifetimes for superconducting aluminum cavities
- Entangling Bosonic Modes via an Engineered Exchange Interaction
- Random access quantum information processors
- Quantum Circuit Refrigerator
- Experimental Proof of Nonlocal Wavefunction Collapse for a Single Particle Using Homodyne Measurement
- Quantum machine learning over infinite dimensions
- Fault-Tolerant High Level Quantum Circuits: Form, Compilation and Description
- How to decompose arbitrary continuous-variable quantum operations
- Transfer of Nonclassical Properties from A Microscopic Superposition to Macroscopic Thermal States in The High Temperature Limit
- Universal Quantum Computing with Arbitrary Continuous-Variable Encoding
- Quantum information processing in phase space: A modular variables approach
- Quantum superpositions and entanglement of thermal states at high temperatures and their applications to quantum information processing
- Universal Continuous Variable Quantum Computation Without Cooling
- Synthesis of Arbitrary Quantum Circuits to Topological Assembly: Systematic, Online and Compact
Cited by in corpus (9)
- High-fidelity bosonic quantum state transfer using imperfect transducers and interference
- Phase-space methods for representing, manipulating, and correcting Gottesman-Kitaev-Preskill qubits
- Hidden qubit cluster states
- Non-Markovian N-spin chain quantum battery in thermal charging process
- The Zak transform: a framework for quantum computation with the Gottesman-Kitaev-Preskill code
- Hot Schrödinger Cat States
- Quantum thermodynamics aspects with a thermal reservoir based on -symmetric Hamiltonians
- Coherence dynamics induced by attenuation and amplification Gaussian channels
- Engineering Non-Gaussian Bosonic Gates through Quantum Signal Processing