Noiseless Linear Amplification and Loss-Tolerant Quantum Relay using Coherent State Superpositions
arXiv:2211.08035 · doi:10.1103/PhysRevA.108.032411
Abstract
Noiseless linear amplification (NLA) is useful for a wide variety of quantum protocols. Here we propose a fully scalable amplifier which, for asymptotically large sizes, can perform perfect fidelity NLA on any quantum state. Given finite resources however, it is designed to perform perfect fidelity NLA on coherent states and their arbitrary superpositions. Our scheme is a generalisation of the multi-photon quantum scissor teleamplifier, which we implement using a coherent state superposition resource state. Furthermore, we prove our NLA is also a loss-tolerant relay for multi-ary phase-shift keyed coherent states. Finally, we demonstrate that our NLA is also useful for continuous-variable entanglement distillation, even with realistic experimental imperfections.
14 pages, 9 figures
References in corpus (10)
- Fault-tolerant linear optical quantum computing with small-amplitude coherent states
- Generation of Optical Coherent State Superpositions by Number-Resolved Photon Subtraction from Squeezed Vacuum
- Generation of large-amplitude coherent-state superposition via ancilla-assisted photon-subtraction
- Optical synthesis of large-amplitude squeezed coherent-state superpositions with minimal resources
- Methods for Producing Optical Coherent State Superpositions
- Entanglement of formation for an arbitrary two-mode Gaussian state
- Quantifying entanglement of formation for two-mode Gaussian states: Analytical expressions for upper and lower bounds and numerical estimation of its exact value
- Large amplitude coherent state superposition generated by a time-separated two-photon subtraction from a continuous wave squeezed vacuum
- Long distance measurement-device-independent quantum key distribution with coherent-state superpositions
- Symmetric M-ary phase discrimination using quantum-optical probe states
Cited by in corpus (7)
- Error suppression in multicomponent cat codes with photon subtraction and teleamplification
- Quantum communications in continuous variable systems
- Engineering Non-Gaussian Bosonic Gates through Quantum Signal Processing
- Teleamplification on the Borealis boson-sampling device
- Linear-optical protocols for mitigating and suppressing noise in bosonic systems
- Simplified scheme for continuous-variable entanglement distillation: multicopy distillation of Gaussian entanglement without heralding Gaussian measurements
- Amplifying Decoherence-Free Many-Body Interactions with Giant Atoms Coupled to Parametric Waveguide