Entanglement-assisted quantum communication with simple measurements
arXiv:2205.09602 · doi:10.1038/s41467-022-33922-5
Abstract
Dense coding is the seminal example of how entanglement can boost qubit communication, from sending one bit to sending two bits. This is made possible by projecting separate particles onto a maximally entangled basis. We investigate more general communication tasks, in both theory and experiment, and show that simpler measurements enable strong and sometimes even optimal entanglement-assisted qubit communication protocols. Using only partial Bell state analysers for two qubits, we demonstrate quantum correlations that cannot be simulated with two bits of classical communication. Then, we show that there exists an established and operationally meaningful task for which product measurements are sufficient for the strongest possible quantum predictions based on a maximally entangled two-qubit state. Our results reveal that there are scenarios in which the power of entanglement in enhancing quantum communication can be harvested in simple and scalable optical experiments.
arXiv commentJournal version, 5 + N pages, 2 figures
References in corpus (23)
- Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
- Significant-loophole-free test of Bell's theorem with entangled photons
- Random Numbers Certified by Bell's Theorem
- A strong loophole-free test of local realism
- Beating the channel capacity limit for linear photonic superdense coding
- On Bell measurements for teleportation
- Dense Coding for Continuous Variables
- Quantum Dense Coding Exploiting Bright EPR Beam
- Event-Ready Bell Test Using Entangled Atoms Simultaneously Closing Detection and Locality Loopholes
- Device-independent tests of classical and quantum dimensions
- Methods for Reliable Teleportation
- Beating the channel capacity limit for superdense coding with entangled ququarts
- Complete and Deterministic discrimination of polarization Bell state assisted by momentum entanglement
- Superdense coding over optical fiber links with complete Bell-state measurements
- Experimental estimation of the dimension of classical and quantum systems
- Quantum Random Access Codes using Single -level Systems
- Experimental Implementaton of Dense Coding Using Nuclear Magnetic Resonance
- Experimental Device-independent Tests of Classical and Quantum Dimensions
- Characterizing finite-dimensional quantum behavior
- Informationally restricted quantum correlations
- Informationally restricted correlations: a general framework for classical and quantum systems
- Entanglement in prepare-and-measure scenarios: many questions, a few answers
- Adaptive advantage in entanglement-assisted communications
Cited by in corpus (23)
- Quantum steering with imprecise measurements
- Classical Cost of Transmitting a Qubit
- Does acceleration always degrade quantum entanglement for tetrapartite Unruh-DeWitt detectors?
- Scalable entanglement certification via quantum communication
- Signatures of gravitational wave memory in the radiative process of entangled quantum probes
- Quantum stochastic communication via high-dimensional entanglement
- Continuous variable quantum communication with 40 pairs of entangled sideband
- Quantum Advantages in (n,d)->1 Random Access Codes
- Classical analogue of quantum superdense coding and communication advantage of a single quantum system
- Classification of joint quantum measurements based on entanglement cost of localization
- Bound entangled states are useful in prepare-and-measure scenarios
- Collective attack free controlled quantum key agreement without quantum memory
- Compression of Entanglement Improves Quantum Communication
- Two instances of random access code in the quantum regime
- Weak entanglement improves quantum communication using only product measurements
- Non-projective Bell state measurements
- Positivity and entanglement of polynomial Gaussian integral operators
- Semi-device-independent self-testing of unitary operations
- Probing nonlocal correlations in magnetic rare-earth clusters
- Symmetric Localizable Multipartite Quantum Measurements from Pauli Orbits
- Quantum inputs in the prepare-and-measure scenario and stochastic teleportation
- Unlimited quantum correlation advantage from bound entanglement
- Detection of nonabsolute separability in quantum states and channels through moments