Cornelia Spee
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View article: Transformations in quantum networks via local operations assisted by finitely many rounds of classical communication
Transformations in quantum networks via local operations assisted by finitely many rounds of classical communication Open
Recent advances have led towards first prototypes of quantum networks in which entanglement is distributed by sources producing bipartite entangled states. This raises the question of which states can be generated in quantum networks based…
View article: Identifying families of multipartite states with non-trivial local entanglement transformations
Identifying families of multipartite states with non-trivial local entanglement transformations Open
The study of state transformations by spatially separated parties with local operations assisted by classical communication (LOCC) plays a crucial role in entanglement theory and its applications in quantum information processing. Transfor…
View article: Approximate and ensemble local entanglement transformations for multipartite states
Approximate and ensemble local entanglement transformations for multipartite states Open
Understanding multipartite entanglement is a key goal in quantum information. Entanglement in pure states can be characterised by considering transformations under Local Operations assisted by Classical Communication (LOCC). However, it ha…
View article: Identifying families of multipartite states with non-trivial local entanglement transformations
Identifying families of multipartite states with non-trivial local entanglement transformations Open
The study of state transformations by spatially separated parties with local operations assisted by classical communication (LOCC) plays a crucial role in entanglement theory and its applications in quantum information processing. Transfor…
View article: Structure of dimension-bounded temporal correlations
Structure of dimension-bounded temporal correlations Open
We analyze the structure of the space of temporal correlations generated by quantum systems. We show that the temporal correlation space under dimension constraints can be nonconvex. For the general case, we provide the necessary and suffi…
View article: Signaling between time steps does not allow for nonlocality beyond hidden nonlocality
Signaling between time steps does not allow for nonlocality beyond hidden nonlocality Open
Hidden nonlocality is the phenomenon that entangled states can be local in\nthe standard Bell scenario but display nonlocality after local filtering.\nHowever, there exist entangled states for which all measurement statistics can\nbe descr…
View article: Genuine multipartite entanglement in time
Genuine multipartite entanglement in time Open
While spatial quantum correlations have been studied in great detail, much less is known about the genuine quantum correlations that can be exhibited by temporal processes. Employing the quantum comb formalism, processes in time can be map…
View article: Report on 2011.09340v2
Report on 2011.09340v2 Open
While spatial quantum correlations have been studied in great detail, much less is known about the genuine quantum correlations that can be exhibited by temporal processes.Employing the quantum comb formalism, processes in time can be mapp…
View article: Report on 2011.09340v2
Report on 2011.09340v2 Open
While spatial quantum correlations have been studied in great detail, much less is known about the genuine quantum correlations that can be exhibited by temporal processes.Employing the quantum comb formalism, processes in time can be mapp…
View article: Characterizing quantum networks: Insights from coherence theory
Characterizing quantum networks: Insights from coherence theory Open
Networks based on entangled quantum systems enable interesting applications\nin quantum information processing and the understanding of the resulting\nquantum correlations is essential for advancing the technology. We show that\nthe theory…
View article: Transformations in quantum networks via local operations assisted by finitely many rounds of classical communication
Transformations in quantum networks via local operations assisted by finitely many rounds of classical communication Open
Recent advances have led towards first prototypes of quantum networks in which entanglement is distributed by sources producing bipartite entangled states. This raises the question of which states can be generated in quantum networks based…
View article: Measurement outcomes that do not occur and their role in entanglement transformations
Measurement outcomes that do not occur and their role in entanglement transformations Open
The characterization of transformations among entangled pure states via local operations assisted by classical communication (LOCC) is a crucial problem in quantum information theory for both theoretical and practical reasons. As LOCC has …
View article: Signaling between time steps does not allow for nonlocality beyond hidden nonlocality
Signaling between time steps does not allow for nonlocality beyond hidden nonlocality Open
Hidden nonlocality is the phenomenon that entangled states can be local in the standard Bell scenario but display nonlocality after local filtering. However, there exist entangled states for which all measurement statistics can be describe…
View article: Signaling between time steps prohibits nonlocality beyond hidden nonlocality
Signaling between time steps prohibits nonlocality beyond hidden nonlocality Open
Hidden nonlocality is the phenomenon that entangled states can be local in the standard Bell scenario but display nonlocality after local filtering. However, there exist entangled states which can be described via a local hidden variable m…
View article: Certifying the purity of quantum states with temporal correlations
Certifying the purity of quantum states with temporal correlations Open
Correlations obtained from sequences of measurements have been employed to distinguish among different physical theories or to witness the dimension of a system. In this work we show that they can also be used to establish semi-device inde…
View article: Genuine temporal correlations can certify the quantum dimension
Genuine temporal correlations can certify the quantum dimension Open
Temporal correlations in quantum mechanics are the origin of several non-classical phenomena, but they depend on the dimension of the underlying quantum system. This allows one to use such correlations for the certification of a minimal Hi…
View article: Certifying quantum memories with coherence
Certifying quantum memories with coherence Open
Quantum memories are an important building block for quantum information\nprocessing. Ideally, these memories preserve the quantum properties of the\ninput. We present general criteria for measures to evaluate the quality of\nquantum memor…
View article: Mode entanglement of Gaussian fermionic states
Mode entanglement of Gaussian fermionic states Open
We investigate the entanglement of n-mode n-partite Gaussian fermionic states\n(GFS). First, we identify a reasonable definition of separability for GFS and\nderive a standard form for mixed states, to which any state can be mapped via\nGa…
View article: Entangled Pure State Transformations via Local Operations Assisted by Finitely Many Rounds of Classical Communication
Entangled Pure State Transformations via Local Operations Assisted by Finitely Many Rounds of Classical Communication Open
We consider generic pure n-qubit states and a general class of pure states of arbitrary dimensions and arbitrarily many subsystems. We characterize those states which can be reached from some other state via local operations assisted by fi…
View article: Entanglement manipulation of multipartite pure states with finite rounds of classical communication
Entanglement manipulation of multipartite pure states with finite rounds of classical communication Open
We studied pure state transformations using local operations assisted by\nfinitely many rounds of classical communication ($LOCC_{\\mathbb{N}}$) in C.\nSpee, J.I. de Vicente, D. Sauerwein, B. Kraus, arXiv:1606.04418 (2016). Here,\nwe first…
View article: Pure state transformations via finitely many round LOCC protocols
Pure state transformations via finitely many round LOCC protocols Open
We consider generic pure $n$-qubit states and a general class of pure states of arbitrary dimensions and arbitrary many subsystems. We characterize those states which can be reached from some other state via Local Operations assisted by fi…
View article: Maximally entangled set of tripartite qutrit states and pure state separable transformations which are not possible via local operations and classical communication
Maximally entangled set of tripartite qutrit states and pure state separable transformations which are not possible via local operations and classical communication Open
Entanglement is the resource to overcome the restriction of operations to\nLocal Operations assisted by Classical Communication (LOCC). The Maximally\nEntangled Set (MES) of states is the minimal set of n-partite pure states with\nthe prop…