#### Filter Results:

- Full text PDF available (19)

#### Publication Year

1999

2017

- This year (1)
- Last 5 years (15)
- Last 10 years (21)

#### Publication Type

#### Co-author

#### Journals and Conferences

#### Key Phrases

Learn More

Quantum physics has remarkable distinguishing characteristics. For example, it gives only probabilistic predictions (non-determinism) and does not allow copying of unknown states (no-cloning). Quantum correlations may be stronger than any classical ones, but information cannot be transmitted faster than light (no-signalling). However, these features do not… (More)

- Jayendra N Bandyopadhyay, Tomasz Paterek, Dagomir Kaszlikowski
- Physical review letters
- 2012

Migratory birds and other species have the ability to navigate by sensing the geomagnetic field. Recent experiments indicate that the essential process in the navigation takes place in the bird's eye and uses chemical reaction involving molecular ions with unpaired electron spins (radical pair). Sensing is achieved via geomagnetic-dependent dynamics of the… (More)

- P Kurzyński, R Ramanathan, D Kaszlikowski
- Physical review letters
- 2012

We study the contextuality of a three-level quantum system using classical conditional entropy of measurement outcomes. First, we analytically construct the minimal configuration of measurements required to reveal contextuality. Next, an entropic contextual inequality is formulated, analogous to the entropic Bell inequalities derived by Braunstein and Caves… (More)

- Dagmar Bruss, Matthias Christandl, Artur Ekert, Berthold-Georg Englert, Dagomir Kaszlikowski, Chiara Macchiavello
- Physical review letters
- 2003

The security of a cryptographic key that is generated by communication through a noisy quantum channel relies on the ability to distill a shorter secure key sequence from a longer insecure one. For an important class of protocols, which exploit tomographically complete measurements on entangled pairs of any dimension, we show that the noise threshold for… (More)

- Anushya Chandran, Dagomir Kaszlikowski, Aditi Sen De, Ujjwal Sen, Vlatko Vedral
- Physical review letters
- 2007

We investigate the entanglement properties of resonating-valence-bond states on two and higher dimensional lattices, which play a significant role in our understanding of various many-body systems. We show that these states are genuinely multipartite entangled, while there is only a negligible amount of two-site entanglement. We comment on possible physical… (More)

A sequence of Bell inequalities for N-particle systems, which involve three settings of each of the local measuring apparatuses, is derived. For GHZ states, quantum mechanics violates these inequalities by factors exponentially growing with N. The threshold visibilities of the multiparticle sinusoidal interference fringes, for which local realistic theories… (More)

- Dagomir Kaszlikowski, Aditi Sen De, Ujjwal Sen, Vlatko Vedral, Andreas Winter
- Physical review letters
- 2008

We show that genuine multiparty quantum correlations can exist on its own, without a supporting background of genuine multiparty classical correlations, even in macroscopic systems. Such possibilities can have important implications in the physics of quantum information and phase transitions.

- Paweł Kurzyński, Adán Cabello, Dagomir Kaszlikowski
- Physical review letters
- 2014

We show that the no-disturbance principle imposes a tradeoff between locally contextual correlations violating the Klyachko-Can-Biniciogˇlu-Shumovski inequality and spatially separated correlations violating the Clauser-Horne-Shimony-Holt inequality. The violation of one inequality forbids the violation of the other. We also obtain the corresponding… (More)

- Alastair Kay, Dagomir Kaszlikowski, Ravishankar Ramanathan
- Physical review letters
- 2009

The inability to produce two perfect copies of an unknown state is inherently linked with the inability to produce maximal entanglement between multiple spins. Despite this, there is no quantitative link between how much entanglement can be generated between spins, and how well an unknown state can be cloned. This situation is remedied by giving a set of… (More)

- Ravishankar Ramanathan, Akihito Soeda, Paweł Kurzyński, Dagomir Kaszlikowski
- Physical review letters
- 2012

In this Letter, we demonstrate that the property of monogamy of Bell violations seen for no-signaling correlations in composite systems can be generalized to the monogamy of contextuality in single systems obeying the Gleason property of no disturbance. We show how one can construct monogamies for contextual inequalities by using the graph-theoretic… (More)