Directly Measuring a Multiparticle Quantum Wave Function via Quantum Teleportation
| Autor: | Li Li, Zu-En Su, Xi-Lin Wang, Run-Ze Liu, Yuan Li, Chao-Yang Lu, Nai-Le Liu, Dian Wu, Ming-Cheng Chen, Jian-Wei Pan |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Physical review letters. 127(3) |
| ISSN: | 1079-7114 |
| Popis: | We propose a new method to directly measure a general multi-particle quantum wave function, a single matrix element in a multi-particle density matrix, by quantum teleportation. The density matrix element is embedded in a virtual logical qubit and is nondestructively teleported to a single physical qubit for readout. We experimentally implement this method to directly measure the wavefunction of a photonic mixed quantum state beyond a single photon using a single observable for the first time. Our method also provides an exponential advantage over the standard quantum state tomography in measurement complexity to fully characterize a sparse multi-particle quantum state. 5 pages, 4 figures |
| Databáze: | OpenAIRE |
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