Nonlocal quantum gate on quantum continuous variables with minimum resources

Abstract

We experimentally demonstrate, with an all-optical setup, a nonlocal deterministic quantum non-demolition interaction gate applicable to quantum states at nodes separated by a physical distance and connected by classical communication channels. The gate implementation, based on entangled states shared in advance, local operations, and classical communication, runs completely in parallel fashion at both the local nodes, requiring minimum resource. The nondemolition character of the gate up to the local unitary squeezing is verified by the analysis using several coherent states. A genuine quantum nature of the gate is confirmed by the capability of deterministically producing an entangled state at the output from two separable input states. The all-optical nonlocal gate operation can be potentially incorporated into distributed quantum computing with atomic or solid state systems as a cross-processor unitary operation.

7 pages, 4 figures

References in corpus (15)

• Driven coherent oscillations of a single electron spin in a quantum dot
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Experimental demonstration of quantum memory for light
• Distributed Quantum Computation Based-on Small Quantum Registers
• Observation of -9 dB quadrature squeezing with improvement of phase stability in homodyne measurement
• Experimental demonstration of topological error correction
• Graphical calculus for Gaussian pure states
• Correlation Matrices of Two-Mode Bosonic Systems
• Gate sequence for continuous variable one-way quantum computation
• Demonstration of a quantum nondemolition sum gate
• 7 dB quadrature squeezing at 860 nm with periodically-poled KTiOPO4
• Demonstration of deterministic and high fidelity squeezing of quantum information
• Quantum Teleportation of Optical Quantum Gates
• Sequential Quantum Teleportation of Optical Coherent States
• Noise excess free record/upload of non-classical states to continuous-variable quantum memory

Cited by in corpus (10)

• All-Optical Long-Distance Quantum Communication with Gottesman-Kitaev-Preskill qubits
• Experimental Demonstration of Non-local Controlled-Unitary Quantum Gates Using a Five-qubit Quantum Computer
• Experimental realization of a dynamic squeezing gate
• Quantum Nondemolition Gate Operations and Measurements in Real Time on Fluctuating Signals
• Deterministic and universal quantum squeezing gate in virtue of teleportation-like protocol
• Demonstration of a fully tuneable entangling gate for continuous-variable one-way quantum computation
• Pulsed quantum interaction between two distant mechanical oscillators
• Rooted-tree network for optimal non-local gate implementation
• Cross talk compensation in multimode continuous-variable entanglement distribution
• Nondestructive verification of continuous-variable entanglement