Remotely preparing optical Schrödinger cat states via homodyne detection in nondegenerate triple-photon spontaneous downconversion
arXiv:2209.02289 · doi:10.1088/2058-9565/ac86f1
Abstract
Optical downconversion is a key resource for generating nonclassical states. Very recently, direct nondegenerate triple-photon spontaneous downconversion (NTPSD) with bright photon triplets and strong third-order correlations has been demonstrated in a superconducting device (2020 Phys. Rev. X 10 011011). Besides, linear and nonlinear tripartite entanglement in this process have also been predicted (2018 Phys. Rev. Lett. 120 043601; 2020 Phys. Rev. Lett. 125 020502). In this paper, we consider the generation of nonclassical optical quantum superpositions and investigate nonlinear quantum steering effects in NTPSD.We find that large-size Schrödinger cat states of one downconverted mode can be achieved when the other two modes are subjected to homodyne detection. Also, a two-photon Bell entangled state can be generated when only one mode is homodyned.We further reveal that such ability of remote state steering originates from nonlinear quantum steerable correlations among the triplets. This is specifically embodied by the seeming violation of the Heisenberg uncertainty relation for the inferred variances of two noncommutating higher-order quadratures of downconverted modes, based on the outcomes of homodyne detection on the other mode, i.e., nonlinear quantum steering, compared to original EPR steering. Our results demonstrate non-Gaussian nonclassical features in NTPSD and would be useful for the fundamental tests of quantum physics and implementations of optical quantum technologies.
References in corpus (38)
- Steering, Entanglement, Nonlocality, and the EPR Paradox
- Negativity of the Wigner function as an indicator of nonclassicality
- Quantum computation with optical coherent states
- The Einstein-Podolsky-Rosen paradox: from concepts to applications
- Generation and manipulation of Schrödinger cat states in Rydberg atom arrays
- Generation of a superposition of odd photon number states for quantum information networks
- Quantum metrology with entangled coherent states
- Testing the limits of quantum mechanical superpositions
- Hybrid quantum information processing
- Efficient Quantum Computation using Coherent States
- Observation of multi-component atomic Schrödinger cat states of up to 20 qubits
- Multipartite Einstein-Podolsky-Rosen steering and genuine tripartite entanglement with optical networks
- Secure continuous variable quantum teleportation and Einstein-Podolsky-Rosen steering
- Fault-tolerant linear optical quantum computing with small-amplitude coherent states
- Non-Gaussian Quantum States and Where to Find Them
- Qubit entanglement on a silicon photonic chip
- Generation of large-amplitude coherent-state superposition via ancilla-assisted photon-subtraction
- Remote generation of magnon Schrödinger cat state via magnon-photon entanglement
- Quantum nonlocality test for continuous-variable states with dichotomic observables
- Observation of Three-Photon Spontaneous Parametric Downconversion in a Superconducting Parametric Cavity
- Demonstration of monogamy relations for Einstein-Podolsky-Rosen steering in Gaussian cluster states
- Near-deterministic quantum teleportation and resource-efficient quantum computation using linear optics and hybrid qubits
- Input-Output Theory with Quantum Pulses
- Classifying directional Gaussian quantum entanglement, EPR steering and discord
- Quantification of Macroscopic Quantum Superpositions within Phase Space
- Demonstration of MultiSetting One-Way Einstein-Podolsky-Rosen Steering in Two-Qubit Systems
- Experimental demonstration of the Einstein-Podolsky-Rosen steering game based on the All-Versus-Nothing proof
- Experimental device-independent verification of quantum steering
- Observation of genuine three-photon interference
- Quantum Interference in Three Photon Down Conversion
- Quantum error correction against photon loss using multi-component cat states
- Tripartite Genuine Non-Gaussian Entanglement in Three-Mode Spontaneous Parametric Downconversion
- Continuous variables triple-photon states quantum entanglement
- Investigating macroscopic quantum superpositions and the quantum-to-classical transition by optical parametric amplification
- Gaussian conversion protocols for cubic phase state generation
- Towards third-order parametric down-conversion in optical fibers
- Non-Gaussian Nature and Entanglement of Spontaneous Parametric Nondegenerate Triple-Photon Generation
- Large array of Schrödinger cat states facilitated by an optical waveguide