Quantum entanglement enhances the capacity of bosonic channels with memory

Abstract

The bosonic quantum channels have recently attracted a growing interest, motivated by the hope that they open a tractable approach to the generally hard problem of evaluating quantum channel capacities. These studies, however, have always been restricted to memoryless channels. Here, it is shown that the classical capacity of a bosonic Gaussian channel with memory can be significantly enhanced if entangled symbols are used instead of product symbols. For example, the capacity of a photonic channel with 70%-correlated thermal noise of one third the shot noise is enhanced by about 11% when using 3.8-dB entangled light with a modulation variance equal to the shot noise.

4 pages, 4 figures

References in corpus (7)

• Classical capacity of the lossy bosonic channel: the exact solution
• Entanglement enhanced information transmission over a quantum channel with correlated noise
• Minimum output entropy of bosonic channels: a conjecture
• Experimental demonstration of entanglement-enhanced classical communication over a quantum channel with correlated noise
• Multiplicativity of maximal output purities of Gaussian channels under Gaussian inputs
• Bosonic Memory Channels
• Minimum Renyi and Wehrl entropies at the output of bosonic channels

Cited by in corpus (42)

• Gaussian Quantum Information
• Quantum channels and memory effects
• Quantum Channels with Memory
• High-bandwidth squeezed light at 1550 nm from a compact monolithic PPKTP cavity
• Classical and quantum capacities of a fully correlated amplitude damping channel
• Entanglement enhanced classical capacity of quantum communication channels with correlated noise in arbitrary dimensions
• Experimental characterization of Gaussian quantum communication channels
• Entanglement-enhanced classical capacity of two-qubit quantum channels with memory: the exact solution
• Gaussian error correction of quantum states in a correlated noisy channel
• A Lossy Bosonic Quantum Channel with Non-Markovian Memory
• Equivalence Relations for the Classical Capacity of Single-Mode Gaussian Quantum channels
• Information capacity in the weak-signal approximation
• Capacities of lossy bosonic channel with correlated noise
• Capacity of a bosonic memory channel with Gauss-Markov noise
• Information transmission over an amplitude damping channel with an arbitrary degree of memory
• Witnessing quantum capacities of correlated channels
• Entanglement and optimal strings of qubits for memory channels
• Qubit channels with small correlations
• Fidelity and Coherence Measures from Interference
• Forgetfulness of continuous Markovian quantum channels
• Gaussian capacity of the quantum bosonic channel with additive correlated Gaussian noise
• Classical capacity of Gaussian thermal memory channels
• On the transitional behavior of quantum Gaussian memory channels
• Transition behavior in the capacity of correlated-noisy channels in arbitrary dimensions
• Privacy of a lossy bosonic memory channel
• Nonlocal restoration of two-mode squeezing in the presence of strong optical loss
• Information transfer with small-amplitude signals
• The information capacity of a single photon
• Classical capacity of phase-sensitive Gaussian quantum channels
• Information transmission via entangled quantum states in Gaussian channels with memory
• Experimental witnessing of the quantum channel capacity in the presence of correlated noise
• Transition of D- Level Quantum Systems Through Quantum Channels with Correlated Noise
• Gaussian matrix-product states for coding in bosonic communication channels
• The classical capacity for continuous variable teleportation channel
• Entanglement may enhance the channel capacity in arbitrary dimensions
• The fidelity of general bosonic channels with pure state input
• New Phase Transitions in Optimal States for Memory Channels
• Photon losses depending on polarization mixedness
• Entanglement enhanced bit rate over multiple uses of a lossy bosonic channel with memory
• The classical capacity for the quantum Markov channel of continuous variables
• Quantum Finite-Depth Memory Channels: Case Study
• Witnessing latent time correlations with a single quantum particle