Quantum fusion of independent networks based on multi-user entanglement swapping
Xu, F., Ma, X., Zhang, Q., Lo, H. K. & Pan, J. W. Secure quantum key distribution with…
The generalized quantum Stein’s lemma and the second law of quantum resource theories
Nielsen, M. A. & Chuang, I. L. Quantum Computation and Quantum Information: 10th Anniversary Edition (Cambridge Univ. Press,…
Spin environment of a superconducting qubit in high magnetic fields
In Fig. 1 we present the field resilient gralmonium qubit, fabricated from a single layer of grAl (cf. Fig. 1a),…
Entanglement theory with limited computational resources
We now aim to determine the fundamental limits and possibilities of computationally efficient entanglement manipulation. Here the goal…
Individual solid-state nuclear spin qubits with coherence exceeding seconds
Steger, M. et al. Quantum information storage for over 180 s using donor spins in a 28Si semiconductor vacuum.…
Observation of constructive interference at the edge of quantum ergodicity
Authors and Affiliations Google Research, Mountain View, CA, USA Dmitry A. Abanin, Rajeev Acharya, Laleh Aghababaie-Beni, Georg Aigeldinger, Ross Alcaraz, Igor Aleiner, Trond I.…
Classical theories of gravity produce entanglement
To illustrate this further, we now demonstrate how equation (4) leads to entanglement in a version of Feynman’s…
Optimization by decoded quantum interferometry
NP-hardness results indicate that finding exact optima and even sufficiently good approximate optima for worst-case instances of many…
Low-overhead transversal fault tolerance for universal quantum computation
Dalzell, A. M. et al. Quantum Algorithms: A Survey of Applications and End-to-End Complexities (Cambridge Univ. Press, 2025).…
Distributed quantum computing across an optical network link
Dual-species ion-trap modules Our apparatus comprises two trapped-ion processing modules, Alice and Bob. Each module, shown in Extended…
‘Squeezed light’ might be the secret to building the quantum internet
Imagine a future where the internet isn’t just fast, it’s fundamentally different. Where information doesn’t travel through cables…
Experimental entanglement swapping through single-photon χ(2) nonlinearity
The SFG-BSA configuration Figure 1a shows a schematic of the SFG-BSA setup. A type-0 PPLN/W is incorporated in a…