53 citations · 78 across the 4 of their papers we have counts for
6 papers · 1 filter
Private information via the Unruh effect
Kamil Bradler, Patrick Hayden, Prakash Panangaden
In a relativistic theory of quantum information, the possible presence of horizons is a complicating feature placing restrictions on the transmission and retrieval of information.…
Relativistically covariant state-dependent cloning of photons
K. Bradler, R. Jauregui
The influence of the relativistic covariance requirement on the optimality of the symmetric state-dependent 1 -> 2 cloning machine is studied. Namely, given a photonic qubit whose…
Eavesdropping of quantum communication from a non-inertial frame
Kamil Bradler
We introduce a relativistic version of quantum encryption protocol by considering two inertial observers who wish to securely transmit quantum information encoded in a free scalar…
Entanglement enhancement and postselection for two atoms interacting with thermal light
Kamil Bradler, Rocio Jauregui
The evolution of entanglement for two identical two-level atoms coupled to a resonant thermal field is studied for two different families of input states. Entanglement enhancement…
Continuous variable private quantum channel
Kamil Bradler
In this paper we introduce the concept of quantum private channel within the continuous variables framework (CVPQC) and investigate its properties. In terms of CVPQC we naturally d…
The effect of multi-pair signal states in quantum cryptography with entangled photons
Miloslav Dusek, Kamil Bradler
Real sources of entangled photon pairs (like parametric down conversion) are not perfect. They produce quantum states that contain more than only one photon pair with some probabil…