Loading in 5 sec....

Sergey Filippov ¹ , Tom áš Ryb á r ² , M ário Ziman² ¹ Moscow Institute of Physics and TechnologyPowerPoint Presentation

Sergey Filippov ¹ , Tom áš Ryb á r ² , M ário Ziman² ¹ Moscow Institute of Physics and Technology

Download Presentation

Sergey Filippov ¹ , Tom áš Ryb á r ² , M ário Ziman² ¹ Moscow Institute of Physics and Technology

Loading in 2 Seconds...

- 85 Views
- Uploaded on
- Presentation posted in: General

Sergey Filippov ¹ , Tom áš Ryb á r ² , M ário Ziman² ¹ Moscow Institute of Physics and Technology

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Local two-qubit channels:probability-based comparison of constituents and entanglement-annihilating behavior

Sergey Filippov¹, Tomáš Rybár², Mário Ziman²

¹Moscow Institute of Physics and Technology

²Research Center for Quantum Information, Slovak Academy of Sciences

CEQIP’2011

- Local channels
- Comparison
- Entanglement-annihilating

B

E2

A

E1

The aim is to distinguish between

- non-identical channels
- twin-identical channels

-distance between channels:

- Matrix representation for one channel

- Input state is
- POVM has two effects, corresponding to projectors on symm. and antisymm. subspaces
- The output mean value is

- Unitary channels
- ‘same’
- ‘different’

- All channels
- ‘same’
- ‘different’

-1

+1

- Input state
- POVM has two effects, corresponding to projectors on symm. and antisymm. subspaces
- The output mean value is

- All channels
- ‘same’
- ‘different’

+0.25

-1

0

+1

Entanglement-annihilating

behaviour

- isentanglement-annihilating if the output state isseparable for all input states
- is entanglement-breaking if the state is disentangledwith respect to partitioning ‘1+2’|‘anc' for any input state andancillary system.

- Entanglement-breaking

- Entanglement-annihilating

- We have considered
- Probability-based comparison of qubit channels
- Entanglement between qubits involved while passing through a local channel

- Problems to investigate
- Upper-dimensional systems (qudits)
- Continuous-variables
- Multipartite systems

- Hope you have had some fun

- Local channels ask many questions important for practical Quantum Information

- Let us try answer them…

- Are participants similar to local channels?

Thank you

for listening!