Tuning between photon-number and quadrature measurements with weak-field homodyne detection
| Autor: | Thomas Gerrits, Bryn Bell, C. G. Wade, William R. Clements, Tom A. W. Wolterink, G. S. Thekkadath, Jacob F. F. Bulmer, Ian A. Walmsley, Andreas Eckstein, Sae Woo Nam, Adriana E. Lita, D. S. Phillips, Jasleen Lugani |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
Quantum Physics Photon business.industry Detector FOS: Physical sciences 01 natural sciences 010305 fluids & plasmas 3. Good health law.invention Direct-conversion receiver Optics Homodyne detection law Quantum state 0103 physical sciences Coherent states 010306 general physics business Quantum Physics (quant-ph) Quantum Beam splitter |
| DOI: | 10.48550/arxiv.1908.04765 |
| Popis: | Variable measurement operators enable the optimization of strategies for testing quantum properties and the preparation of a range of quantum states. Here, we experimentally implement a weak-field homodyne detector that can continuously tune between measuring photon numbers and field quadratures. We combine a quantum signal with a coherent state on a balanced beam splitter and detect light at both output ports using photon-number-resolving transition edge sensors. We observe that the discrete difference statistics converge to the quadrature distribution of the signal as we increase the coherent state amplitude. Moreover, in a proof-of-principle demonstration of state engineering, we show the ability to control the photon-number distribution of a state that is heralded using our weak-field homodyne detector. Comment: 12 pages, 10 figures; includes Supplemental Material |
| Databáze: | OpenAIRE |
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