5 papers · 1 filter
Witnessing the Effective Entanglement in the COW Protocol
F. Rezazadeh, A. Mani, M. Khodabandeh +2
We present a rigorous mathematical framework for verifying effective entanglement in a Coherent One-Way (COW) quantum key distribution setup. In particular, we introduce a two-para…
Witnessing entanglement of remote particles with incomplete teleportation
Vahid Jannessary, Fatemeh Rezazadeh, Sadegh Raeisi +1
Having common reference frames or aligned coordinate systems, is one of the presumptions in witnessing entanglement in a two-party state possessed by two remote parties. This assum…
Quantum coherence between subspaces: State transformation, Cohering Power, -coherence and other properties
Azam Mani, Fatemeh Rezazadeh, Vahid Karimipour
The concept of bock-coherence, first introduced in [1] and developed in [2,3] encompasses the case where experimental capabilities are not so delicate to perform arbitrary refined…
Quantum Key Distribution with no Shared Reference Frame
Fatemeh Rezazadeh, Azam Mani, Vahid Karimipour
Any quantum communication task requires a common reference frame (i.e. phase, coordinate system). In particular, Quantum Key Distribution requires different bases for preparation a…
The power of a shared singlet state, compared with a shared reference frame
F. Rezazadeh, A. Mani, V. Karimipour
We show that a Shared Singlet State (SSS) can supersede a Shared Reference Frame (SRF) in certain quantum communication tasks, i.e. tasks in which two remote players are required t…