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quantum gate

Increasing efficiency of a linear-optical quantum gate using an electronic feed forward

Increasing efficiency of a linear-optical quantum gate using an electronic feed forward

We have successfully used a fast electronic feed forward to increase the success probability of a linear optical implementation of a programmable phase gate from 25% to its theoretical limit of 50% [Phys. Rev. A 85, 012305 (2012)]. The feed

Miroslav 2011/12/212013/06/04 Highlights Read more

Hadamard gate for coherent state qubits

Hadamard gate for coherent state qubits

Our paper on Hadamard gate for coherent state qubits (Schroedinger cat-like states) has been published in Physical Review A as Rapid Communication [Phys. Rev. A 84, 050301(R) (2011)].  The project was done in cooperation of prof. Ulrik L. Andersen’s group

Miroslav 2011/11/122011/11/12 Highlights, Uncategorized Read more

Bc/Mgr nová témata: detekce světla, kvantové počítače

Bc/Mgr nová témata: detekce světla, kvantové počítače

Linearita detekce světla Linearita detekce světla je důležitou podmínkou v řadě metrologických aplikací ale i při testování fundamentálních fyzikálních zákonů. Od lineárního optického detektoru požadujeme, aby zvýšení dopadajícího optického výkonu vedlo k přímo úměrnému zvýšení elektrického proudu či napětí na výstupu. Šum i

Miroslav 2011/09/272011/09/27 Thesis themes Read more

Jamiołkowski-Choi isomorphism

The Choi-Jamiołkowski isomorphism is an isomorphism between linear maps from Hilbert space \({\cal H}\) to Hilbert space \({\cal K}\) and operators living in the tensor product space \({\cal H}\otimes{\cal K}\). This isomorphism provides a simple way of studying linear maps

Miroslav 2011/07/12 Theory and methods Read more

Hadamard gate for coherent state qubits

Hadamard gate for coherent state qubits

We have experimentally demonstrated a single mode Hadamard gate for coherent state qubits by using a hybrid projector system consisting of a conditional homodyne detector and a photon counter. This implementation constitutes the first step towards the demonstration of quantum

Miroslav 2011/07/112011/07/11 Highlights Read more
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