Sinan Bugu

Fusing multipleWstates simultaneously with a Fredkin gate

We propose an optical scheme to prepare large-scale entangled networks of W states. The scheme works by simultaneously fusing three polarization-encoded W states of arbitrary size via accessing only one qubit of each W state. It is composed of a Fredkin gate (controlled-swap gate), two fusion gates [as proposed in New J. Phys. 13, 103003 (2011)] and an H-polarized ancilla photon. Starting with three

An optical gate for simultaneous fusion of four photonic W or Bell states

n

An analysis of concurrence entanglement measure and quantum fisher information of quantum communication networks of two-qubits

-qubit W states, the scheme prepares a new W state with

Deterministic local doubling of W states

3(n-1)

Constructing quantum logic gates using q-deformed harmonic oscillator algebras

-qubits after postselection if both fusion gates operate successfully, i.e. a four-fold coincidence at the detectors. The proposed scheme reduces the cost of creating arbitrarily large W states considerably when compared to previously reported schemes.

Enhancing the W State Quantum Network Fusion Process with A Single Fredkin Gate

In order to create large-scale polarization entangled W states, there have been several proposals and some experimental demonstrations. An outstanding proposal is a simple setup which probabilistically fuses two W states of arbitrary sizes

Quantum Fisher Information of N Particles in the Superposition of W and GHZ States

n\ge 3

Behavior of Quantum Fisher Information of Bell Pairs under Decoherence Channels

and