Recovering quantum entanglement after its certification
arXiv:2305.06852 · doi:10.1126/sciadv.adi5261
Abstract
Entanglement is a crucial quantum resource with broad applications in quantum information science. For harnessing entanglement in practice, it is a prerequisite to certify the entanglement of a given quantum state. However, the certification process itself destroys the entanglement, thereby precluding further exploitation of the entanglement. Resolving this conflict, here we present a protocol that certifies the entanglement of a quantum state without complete destruction, and then, probabilistically recovers the original entanglement to provide useful entanglement for further quantum applications. We experimentally demonstrate this protocol in a photonic quantum system, and highlight its usefulness for selecting high-quality entanglement from a realistic entanglement source. Moreover, our study reveals various tradeoff relations among the physical quantities involved in the protocol. Our results show how entanglement certification can be made compatible with subsequent quantum applications, and more importantly, be beneficial to sort entanglement for better performance in quantum technologies.
References in corpus (31)
- Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
- Bell nonlocality
- On the Measurement of Qubits
- Significant-loophole-free test of Bell's theorem with entangled photons
- A strong loophole-free test of local realism
- Ground-to-satellite quantum teleportation
- Quantum Secure Direct Communication with Quantum Memory
- Experimental EPR-Steering of Bell-local States
- Observation of one-way Einstein-Podolsky-Rosen steering
- Entanglement Certification From Theory to Experiment
- Quantum certification and benchmarking
- Distributed quantum sensing in a continuous variable entangled network
- Experimental device-independent quantum key distribution between distant users
- Detection of entanglement with few local measurements
- One-way Einstein-Podolsky-Rosen Steering
- Joint Measurability, Einstein-Podolsky-Rosen Steering, and Bell Nonlocality
- Quantitative entanglement witnesses
- Reversing the Weak Quantum Measurement for a Photonic Qubit
- Multiple Observers Can Share the Nonlocality of Half of an Entangled Pair by Using Optimal Weak Measurements
- Experimentally Generated Randomness Certified by the Impossibility of Superluminal Signals
- Estimating entanglement measures in experiments
- Fidelity balance in quantum operations
- Distributed quantum phase estimation with entangled photons
- Photonic verification of device-independent quantum key distribution against collective attacks
- Experimental Entanglement Concentration and Universal Bell-state Synthesizer
- Weak-to-strong transition of quantum measurement in a trapped-ion system
- Polarization-entangled photon-pair source obtained via type-II non-collinear SPDC process with PPKTP crystal
- Experimental Certification of Sustained Entanglement and Nonlocality after Sequential Measurements
- Einstein-Podolsky-Rosen Steering in Two-sided Sequential Measurements with One Entangled Pair
- A quantum-bit encoding converter
- Global triplewise information trade-off in quantum measurement
Cited by in corpus (4)
- Generation of three-dimensional cluster entangled state
- Quasiprobability distributions with weak measurements
- Trade-off between Information Gain and Disturbance in Local Discrimination of Entangled Quantum States
- Incompatibility of optimized protection of entanglement and teleportation fdelity in the presence of decoherence