Journal
PHYSICAL REVIEW LETTERS
Volume 112, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.200402
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Funding
- Swiss National Science Foundation [PP00P2_138917, QSIT]
- SEFRI (COST action) [MP1006]
- EU DIQIP
- Janos Bolyai Programme
- OTKA [PD101461]
- [TAMOP-4.2.2.C11/1/KONV-2012-0001]
- Engineering and Physical Sciences Research Council [EP/J007838/1] Funding Source: researchfish
- EPSRC [EP/J007838/1] Funding Source: UKRI
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Einstein-Podolsky-Rosen steering is a form of quantum nonlocality exhibiting an inherent asymmetry between the observers, Alice and Bob. A natural question is then whether there exist entangled states which are one-way steerable, that is, Alice can steer Bob's state, but it is impossible for Bob to steer the state of Alice. So far, such a phenomenon has been demonstrated for continuous variable systems, but with a strong restriction on allowed measurements, namely, considering only Gaussian measurements. Here we present a simple class of entangled two-qubit states which are one-way steerable, considering arbitrary projective measurements. This shows that the nonlocal properties of entangled states can be fundamentally asymmetrical.
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