# Protocol for direct counterfactual quantum communication.

@article{Salih2013ProtocolFD, title={Protocol for direct counterfactual quantum communication.}, author={Hatim Salih and Zheng-Hong Li and M. Al-amri and Muhammad Suhail Zubairy}, journal={Physical review letters}, year={2013}, volume={110 17}, pages={ 170502 } }

It has long been assumed in physics that for information to travel between two parties in empty space, "Alice" and "Bob," physical particles have to travel between them. Here, using the "chained" quantum Zeno effect, we show how, in the ideal asymptotic limit, information can be transferred between Alice and Bob without any physical particles traveling between them.

## 135 Citations

Counterfactual quantum-information transfer without transmitting any physical particles

- PhysicsScientific reports
- 2015

Unlike the typical teleportation, the present scheme can transport an unknown qubit in a nondeterministic manner without prior entanglement sharing or classical communication between the two distant participants.

Protocol for Counterfactually Transporting an Unknown Qubit

- PhysicsFront. Phys.
- 2016

Quantum teleportation circumvents the uncertainty principle using dual channels: a quantum one consisting of previously-shared entanglement, and a classical one, together allowing the disembodied…

Probabilistic direct counterfactual quantum communication

- Computer Science
- 2017

This work presents a probabilistic-counterfactual quantum communication protocol, which is proved to have advantages over the deterministic ones, and could evolve to a deterministic one solely by adjusting the parameters of the beam splitters.

How Quantum is Quantum Counterfactual Communication?

- Physics
- 2019

Quantum Counterfactual Communication is the recently-proposed idea of using quantum physics to send messages between two parties, without any matter/energy transfer associated with the bits sent.…

Quantum teleportation without classical channel

- PhysicsInternational Seminar on Photonics, Optics, and its Applications
- 2016

For the first time, we show how quantum teleportation can be achieved without the assistance of classical channels. Our protocol does not need any pre-established entangled photon pairs beforehand.…

Counterfactual distribution of Schrödinger cat states

- Mathematics
- 2015

In the counterfactual cryptography scheme proposed by Noh (2009), the sender Alice probabilistically transmits classical information to the receiver Bob without the physical travel of a particle.…

Comment on "Direct counterfactual transmission of a quantum state"

- Physics
- 2016

The protocol for counterfactual transmission of a qubit [Li et al., Phys. Rev. A 92, 052315 (2015)] relies on the counterfactuality of transmissions of bit 1 and of bit 0. Since counterfactuality of…

From a Quantum Paradox to Counterportation

- Physics
- 2018

We uncover a new quantum paradox, where a simple question about two identical quantum systems reveals unsettlingly paradoxical answers when weak measurements are considered. Our resolution of the…

Counterfactual communication

- PhysicsOPTO
- 2019

Counterfactual communication, transferring bits and even qubits without particle travelling in the transmission channel is a bizarre quantum effect. It is also a very controversial topic. Here I will…

Exchange unknown quantum states with almost invisible photons.

- PhysicsOptics express
- 2019

We propose a quasi-counterfactual quantum swap gate for exchanging Alice's unknown photon state and Bob's unknown atomic state under the condition that only Alice's photon may appear in the…

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