scholarly journals Maximal randomness from partially entangled states

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Erik Woodhead ◽  
Jędrzej Kaniewski ◽  
Boris Bourdoncle ◽  
Alexia Salavrakos ◽  
Joseph Bowles ◽  
...  
Keyword(s):  
Entangled States ◽  
Partially Entangled States

scholarly journals Quantum cryptography using partially entangled states

2010 ◽  
Vol 283 (1) ◽  
pp. 184-188 ◽  
Author(s):  
Goren Gordon ◽  
Gustavo Rigolin
Keyword(s):  
Quantum Cryptography ◽  
Entangled States ◽  
Partially Entangled States

Splitting Unknown Qutrit or Ququart States via Two-Qubit Partially Entangled States Channel

2013 ◽  
Vol 59 (2) ◽  
pp. 157-164 ◽  
Author(s):  
Zhang Wen ◽  
Xiong Kuang-Wei ◽  
Zuo Xue-Qin ◽  
Zhang Zi-Yun
Keyword(s):  
Entangled States ◽  
Partially Entangled States

REMOTE GENERALIZED MEASUREMENTS USING PARTIALLY ENTANGLED STATES

2006 ◽  
Vol 04 (01) ◽  
pp. 181-187 ◽  
Author(s):  
B. REZNIK
Keyword(s):  
Entangled States ◽  
Generalized Measurement ◽  
Maximally Entangled States ◽  
Partially Entangled States ◽  
Projective Measurements

We propose a method for implementing remotely a generalized measurement (POVM). We show that remote generalized measurements consume less entanglement compared with remote projective measurements, and can be optimally performed using non-maximally entangled states. We derive the entanglement cost of such measurements.

GENERALIZED THREE-PARTY QUBIT OPERATION SHARING

2013 ◽  
Vol 11 (01) ◽  
pp. 1350011 ◽  
Author(s):  
DAOCHU LIU ◽  
YIMIN LIU ◽  
XIAOFENG YIN ◽  
XIANSONG LIU ◽  
ZHANJUN ZHANG
Keyword(s):  
Entangled States ◽  
Quantum Channels ◽  
Partially Entangled States ◽  
Qubit Operation

Two three-party schemes of qubit operation sharing proposed by Zhang and Cheung [J. Phys. B44 (2011) 165508] are generalized by utilizing partially entangled states as quantum channels instead of maximally entangled ones. Their quantum and classical resource consumptions, necessary-operation complexities, success probabilities and efficiencies are calculated and compared with each other. Moreover, it is revealed that the success probabilities are completely determined by the shared entanglement.

scholarly journals Device-independent randomness generation with sublinear shared quantum resources

Quantum ◽  
2018 ◽  
Vol 2 ◽  
pp. 86 ◽  
Author(s):  
Cédric Bamps ◽  
Serge Massar ◽  
Stefano Pironio
Keyword(s):  
Quantum Cryptography ◽  
Quantum Communication ◽  
Random Number ◽  
Essential Feature ◽  
Random Number Generation ◽  
Fundamental Question ◽  
Entangled States ◽  
Number Generation ◽  
Singlet States ◽  
Partially Entangled States

In quantum cryptography, device-independent (DI) protocols can be certified secure without requiring assumptions about the inner workings of the devices used to perform the protocol. In order to display nonlocality, which is an essential feature in DI protocols, the device must consist of at least two separate components sharing entanglement. This raises a fundamental question: how much entanglement is needed to run such DI protocols? We present a two-device protocol for DI random number generation (DIRNG) which produces approximatelynbits of randomness starting fromnpairs of arbitrarily weakly entangled qubits. We also consider a variant of the protocol wheremsinglet states are diluted intonpartially entangled states before performing the first protocol, and show that the numbermof singlet states need only scale sublinearly with the numbernof random bits produced. Operationally, this leads to a DIRNG protocol between distant laboratories that requires only a sublinear amount of quantum communication to prepare the devices.

Partially entangled states bridge in quantum teleportation

2014 ◽  
Vol 9 (5) ◽  
pp. 646-651 ◽  
Author(s):  
Xiao-Fei Cai ◽  
Xu-Tao Yu ◽  
Li-Hui Shi ◽  
Zai-Chen Zhang
Keyword(s):  
Quantum Teleportation ◽  
Entangled States ◽  
Partially Entangled States
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