Quantum tele-amplification with a continuous variable superposition state
arXiv:1211.6634 · doi:10.1038/nphoton.2013.101
Abstract
Optical coherent states are classical light fields with high purity, and are essential carriers of information in optical networks. If these states could be controlled in the quantum regime, allowing for their quantum superposition (referred to as a Schrödinger cat state), then novel quantum-enhanced functions such as coherent-state quantum computing (CSQC), quantum metrology, and a quantum repeater could be realized in the networks. Optical cat states are now routinely generated in the laboratories. An important next challenge is to use them for implementing the aforementioned functions. Here we demonstrate a basic CSQC protocol, where a cat state is used as an entanglement resource for teleporting a coherent state with an amplitude gain. We also show how this can be extended to a loss-tolerant quantum relay of multi-ary phase-shift keyed coherent states. These protocols could be useful both in optical and quantum communications.
6+12 pages REVTeX, 16 figures; v2: numerous minor edits and corrections, one appendix added
References in corpus (6)
- Generation of a superposition of odd photon number states for quantum information networks
- Fault-tolerant linear optical quantum computing with small-amplitude coherent states
- Generation of large-amplitude coherent-state superposition via ancilla-assisted photon-subtraction
- Teleportation of Nonclassical Wave Packets of light
- Optical continuous-variable qubit
- Non-Gaussian states from continuous-wave Gaussian light sources
Cited by in corpus (41)
- Hybrid quantum information processing
- Secure continuous variable quantum teleportation and Einstein-Podolsky-Rosen steering
- Entangling quantum and classical states of light
- Generalized quantum scissors for noiseless linear amplification
- Observing optical coherence across Fock layers with weak-field homodyne detectors
- Phase-space interference of states optically truncated by quantum scissors: Generation of distinct superpositions of qudit coherent states by displacement of vacuum
- Numerical Study on Secrecy Capacity and Code Length Dependence of the Performances in Optical Wiretap Channels
- Quantum phase estimation using a multi-headed cat state
- Characterizations and Quantifications of Macroscopic Quantumness and Its Implementations using Optical Fields
- Quantifying quantum coherence of optical cat states
- Remote preparation of optical cat states based on Gaussian entanglement
- Ideal Quantum Tele-amplification up to a Selected Energy Cut-off using Linear Optics
- Loss-resilient photonic entanglement swapping using optical hybrid states
- Experimental preparation and manipulation of squeezed cat states via an all-optical in-line squeezer
- Heralded amplification of photonic qubits
- Multi-photon quantum communication in quantum networks
- Deterministic and universal quantum squeezing gate in virtue of teleportation-like protocol
- Purification of photon subtraction from continuous squeezed light by filtering
- Noiseless Linear Amplification and Loss-Tolerant Quantum Relay using Coherent State Superpositions
- Bell inequality tests using asymmetric entangled coherent states in asymmetric lossy environments
- Universal quantum computation with optical four-component cat qubits
- Long-distance entanglement sharing using hybrid states of discrete and continuous variables
- Conversion of Thermal Equilibrium States into Superpositions of Macroscopically Distinct States
- Generation of distributed entangled coherent states over a lossy environment with inefficient detectors
- Efficient amplification of superpositions of coherent states using input states with different parities
- Loss-tolerant transmission of multiphoton-qubit information via hybrid entanglement
- Overcoming the repeaterless bound in continuous-variable quantum communication without quantum memories
- Deterministic amplification of Schroedinger cat states in circuit quantum electrodynamics
- Schmidt-number benchmarks for continuous-variable quantum devices
- Amplification of optical Schrödinger cat states with implementation protocol based on frequency comb
- Amplification uncertainty relation for probabilistic amplifiers
- Error suppression in multicomponent cat codes with photon subtraction and teleamplification
- Robust Gaussian Teleportation with Attenuations and Non-unity Gain
- Loss-tolerant concatenated Bell-state measurement with encoded coherent-state qubits for long-range quantum communication
- Entanglement, loss, and quantumness: When balanced beam splitters are best
- Qubit-Programmable Operations on Quantum Light Fields
- Teleamplification on the Borealis boson-sampling device
- Photonic Hybrid Quantum Computing
- Generating non-classical states from spin coherent states via interaction with ancillary spins
- Control of continuous-mode single-photon states: a review
- Linear-optical protocols for mitigating and suppressing noise in bosonic systems