Interfacing Gottesman-Kitaev-Preskill Qubits to Quantum Memories
arXiv:2406.04275 · doi:10.1103/4glk-qyj3
Abstract
Gottesman-Kitaev-Preskill (GKP) states have been demonstrated to pose significant advantages when utilized for fault-tolerant all optical continuous-variable quantum computing as well as for quantum communications links for entanglement distribution. However interfacing these systems to long-lived solid-state quantum memories has remained an open problem. Here we propose an interface between quantum memories and GKP qubit states based on a cavity-mediated controlled displacement gate. We characterize the quality of memory-GKP entanglement as a function of cavity parameters suggesting optimal regimes of operation for high-quality state transfer between either qubit states. We further extend this protocol to demonstrate the creation of GKP cluster states by avoiding the requirement of ancillary optical quadrature-squeezed light. Utilizing post-selected entanglement swapping operations for GKP qubits, we demonstrate the utility of our protocol for high-rate entanglement generation between quantum memories. Extensions and derivatives of our proposal could enable a wide variety of applications by utilizing the operational trade-offs for qubits encoded in memory and in the GKP basis.
17 pages; 8 figures; Comments are welcome!
References in corpus (25)
- Gaussian Quantum Information
- Cavity-based quantum networks with single atoms and optical photons
- Scalable photonic quantum computation through cavity-assisted interaction
- Distillation of secret key and entanglement from quantum states
- Efficient high-fidelity quantum computation using matter qubits and linear optics
- Experimental demonstration of memory-enhanced quantum communication
- Silicon-Vacancy Spin Qubit in Diamond: A Quantum Memory Exceeding 10 ms with Single-Shot State Readout
- Encoding a qubit in a trapped-ion mechanical oscillator
- Fault-Tolerant Measurement-Based Quantum Computing with Continuous-Variable Cluster States
- Performance and structure of single-mode bosonic codes
- Quantum network nodes based on diamond qubits with an efficient nanophotonic interface
- Deterministic creation of entangled atom-light Schrödinger-cat states
- High-threshold fault-tolerant quantum computation with analog quantum error correction
- Improved quantum capacity bounds of Gaussian loss channels and achievable rates with Gottesman-Kitaev-Preskill codes
- Generating Grid States From Schrödinger Cat States without Post-Selection
- Towards a deterministic interface between trapped-ion qubits and travelling photons
- Continuous-variable gate teleportation and bosonic-code error correction
- Achievable rates for the Gaussian quantum channel
- All-Optical Long-Distance Quantum Communication with Gottesman-Kitaev-Preskill qubits
- Quantum repeaters based on concatenated bosonic and discrete-variable quantum codes
- Quantum interactions with pulses of radiation
- Generation of optical Gottesman-Kitaev-Preskill states with cavity QED
- A Polarization Encoded Photon-to-Spin Interface
- All-photonic GKP-qubit repeater using analog-information-assisted multiplexed entanglement ranking
- Entangling Quantum Memories via Heralded Photonic Bell Measurement