Subtraction better than addition: Entanglement in multimode squeezed vacuum post-interface with photons
arXiv:1506.04108 · doi:10.1103/PhysRevA.93.052313
Abstract
We investigate the entanglement patterns of photon-added and -subtracted four-mode squeezed vacuum states. Entanglements in different scenarios are analyzed by varying the number of photons added or subtracted in certain modes, which are referred to as the "player" modes, the others being "spectators." We find that the photon-subtracted state can give us higher entanglement than the photon-added state which is in contrast of the two-mode situation. We also study the logarithmic negativity of the two-mode reduced density matrix obtained from the four-mode state which again shows that the state after photon subtraction can possess higher entanglement than that of the photon-added state, and we then compare it to that of the two-mode squeezed vacuum state. Moreover, we examine the non-Gaussianity of the photon-added and -subtracted states to find that the rich features provided by entanglement cannot be captured by the measure of non-classicality.
14 pages, 14 figures
References in corpus (66)
- Quantum entanglement
- Quantum Cryptography
- A computable measure of entanglement
- Quantum information with continuous variables
- Area laws for the entanglement entropy - a review
- Review article: Linear optical quantum computing
- Measurement-based quantum computation with cluster states
- The logarithmic negativity: A full entanglement monotone that is not convex
- Experimental One-Way Quantum Computing
- NMR Techniques for Quantum Control and Computation
- Quantum computing with trapped ions
- 14-qubit entanglement: creation and coherence
- Measurement-based quantum computation
- On the Theory of Quantum Secret Sharing
- Optical quantum computation using cluster states
- On the impossibility of distilling Gaussian states with Gaussian operations
- The characterization of Gaussian operations and Distillation of Gaussian States
- Quantum Communication through Spin Chain Dynamics: an Introductory Overview
- Multiparty Quantum Secret Sharing
- Quantum information transfer using photons
- Graph States for Quantum Secret Sharing
- Hybrid quantum information processing
- Non-gaussian statistics from individual pulses of squeezed light
- Continuous-variable teleportation improvement by photon subtraction via conditional measurement
- Cluster-state quantum computation
- Experimental demonstration of a hyper-entangled ten-qubit Schrödinger cat state
- The asymptotic entanglement cost of preparing a quantum state
- Increasing entanglement between Gaussian states by coherent photon subtraction
- Multiphoton Quantum Optics and Quantum State Engineering
- Controllable generation of highly nonclassical states from nearly pure squeezed vacua
- Quantum computing with spin cluster qubits
- Teleportation improvement by inconclusive photon subtraction
- Experimental generation of four-mode continuous-variable cluster states
- Entanglement evaluation of non-Gaussian states generated by photon subtraction from squeezed states
- Building Gaussian Cluster States by Linear Optics
- Photonic architecture for scalable quantum information processing in NV-diamond
- Quantifying the non-Gaussian character of a quantum state by quantum relative entropy
- Partial Teleportation of Entanglement in the Noisy Environment
- Benchmarking quantum control methods on a 12-qubit system
- Continuous variable quantum teleportation with non-Gaussian resources
- Quantifying non-Gaussianity for quantum information
- Programmable Multimode Quantum Networks
- Recent developments in photon-level operations on travelling light fields
- Distributed quantum dense coding
- Enhancing quantum entanglement by photon addition and subtraction
- Enhancing quantum entanglement for continuous variables by a coherent superposition of photon subtraction and addition
- Experimental demonstration of bosonic commutation relation via superpositions of quantum operations on thermal light fields
- Synthesis and tomographic characterization of the displaced Fock state of light
- Engineering quantum operations on traveling light beams by multiple photon addition and subtraction
- Generalized Quantum Secret Sharing
- Distillation of the two-mode squeezed state
- One-step implementation of multi-qubit conditional phase gating with nitrogen-vacancy centers coupled to a high-Q silica microsphere cavity
- Limitations of quantum computing with Gaussian cluster states
- Coherent-state phase concentration by quantum probabilistic amplification
- Realistic continuous-variable quantum teleportation with non-Gaussian resources
- Device-independent demonstration of genuine multipartite entanglement
- Relative entropy is an exact measure of non-Gaussianity
- Unified criterion for security of secret sharing in terms of violation of Bell inequality
- Quantum state engineering by click counting
- Non-classicality of photon added coherent and thermal radiations
- Efficient measurement-based quantum computing with continuous-variable systems
- On the equivalence between sharing quantum and classical secrets, and error correction
- Entanglement Enhances Security in Secret Sharing
- Not-so-normal mode decomposition
- Non-Gaussian states produced by close-to-threshold optical parametric oscillators: role of classical and quantum fluctuations
- New n-mode squeezing operator and squeezed states with standard squeezing
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- Non-Gaussian Quantum States and Where to Find Them
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- Entanglement and Wigner function negativity of multimode non-Gaussian states
- Statistical signatures of multimode single-photon added and subtracted states of light
- Conditional non-Gaussian quantum state preparation
- Computable genuine multimode entanglement measure: Gaussian vs. non-Gaussian
- Manipulation of Multimode Squeezing in a Coupled Waveguide Array
- Optimal entanglement enhancing via conditional measurements
- Response in violation of Bell inequality to imperfect photon addition and subtraction in noisy squeezed states of light
- Optimal sensing of photon addition and subtraction on nonclassical light
- Quantum illumination with noisy probes: Conditional advantages of non-Gaussianity
- Entanglement Enhancement in Multimode Integrated Circuits
- Noisy dynamics of Gaussian entanglement: a transient bound entangled phase before separability
- Majorization theoretical approach to entanglement enhancement via local filtration