Confining the state of light to a quantum manifold by engineered two-photon loss
| Autor: | Ioan Pop, Shyam Shankar, Angela Kou, Luigi Frunzio, Robert Schoelkopf, Andrei Petrenko, Mazyar Mirrahimi, Brian Vlastakis, Katrina Sliwa, Michael Hatridge, Anirudh Narla, Zaki Leghtas, Matthew Reagor, Michel Devoret, Steven Touzard |
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| Přispěvatelé: | Departments of Applied Physics [New Haven], Yale University [New Haven], QUANTum Information Circuits (QUANTIC), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Inria Paris-Rocquencourt, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Université Pierre et Marie Curie - Paris 6 (UPMC)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS-PSL), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Mines Paris - PSL (École nationale supérieure des mines de Paris) |
| Rok vydání: | 2014 |
| Předmět: |
Physics
Quantum optics Quantum Physics Multidisciplinary Photon FOS: Physical sciences Quantum entanglement symbols.namesake [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph] Quantum state [MATH.MATH-MP]Mathematics [math]/Mathematical Physics [math-ph] Qubit Quantum mechanics symbols Coherent states Quantum information Quantum Physics (quant-ph) Schrödinger's cat |
| Zdroj: | Science Science, American Association for the Advancement of Science, 2015, 347 (6224), pp.853-857 ⟨10.1126/science.aaa2085⟩ Science, 2015, 347 (6224), pp.853-857 ⟨10.1126/science.aaa2085⟩ |
| ISSN: | 0036-8075 1095-9203 |
| DOI: | 10.48550/arxiv.1412.4633 |
| Popis: | Physical systems usually exhibit quantum behavior, such as superpositions and entanglement, only when they are sufficiently decoupled from a lossy environment. Paradoxically, a specially engineered interaction with the environment can become a resource for the generation and protection of quantum states. This notion can be generalized to the confinement of a system into a manifold of quantum states, consisting of all coherent superpositions of multiple stable steady states. We have experimentally confined the state of a harmonic oscillator to the quantum manifold spanned by two coherent states of opposite phases. In particular, we have observed a Schrodinger cat state spontaneously squeeze out of vacuum, before decaying into a classical mixture. This was accomplished by designing a superconducting microwave resonator whose coupling to a cold bath is dominated by photon pair exchange. This experiment opens new avenues in the fields of nonlinear quantum optics and quantum information, where systems with multi-dimensional steady state manifolds can be used as error corrected logical qubits. |
| Databáze: | OpenAIRE |
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