# From Counterportation to Local Wormholes

@inproceedings{Salih2018FromCT, title={From Counterportation to Local Wormholes}, author={Hatim Salih}, year={2018} }

We propose an experimental realisation of the protocol for the counterfactual disembodied transport of an unknown qubit—or what we call counterportation— where sender and receiver, remarkably, exchange no particles. We employ cavity quantum electrodynamics, estimating resources for beating the classical ﬁdelity limit—except, unlike teleportation, no pre-shared entanglement nor classical communication are required. Our approach is multiple orders of magnitude more efﬁcient in terms of physical…

No Paper Link Available

## 6 Citations

The laws of physics do not prohibit counterfactual communication

- Physicsnpj Quantum Information
- 2022

It has been conjectured that counterfactual communication is impossible, even for post-selected quantum particles. We strongly challenge this by proposing precisely such a counterfactual scheme…

Is the dynamical quantum Cheshire cat detectable?

- Physics
- 2022

We explore how one might detect the dynamical quantum Cheshire cat proposed by Aharonov et al. We show that, in practice, we need to bias the initial state by adding/subtracting a small probability…

Does the weak trace show the past of a quantum particle?

- Physics
- 2021

We investigate the weak trace approach to determining the path of a quantum particle. Speciﬁcally, obtaining the weak value of the position operator necessarily perturbs the system away from the…

Counterfactual ghost imaging

- Physicsnpj Quantum Information
- 2021

A protocol for ghost imaging is given in a way that is always counterfactual—while imaging an object, no light interacts with that object, and it provides a many-fold improvement in visibility and signal-to-noise ratio over previous protocols.

Deterministic Teleportation and Universal Computation Without Particle Exchange

- Physics
- 2020

The controlled-phase universal gate is proposed, where no particles are exchanged between control and target, allows complete Bell detection among two remote parties, and is experimentally feasible.

Exchange-free computation on an unknown qubit at a distance

- Mathematics, Physics
- 2020

A protocol is proposed that allows one party to directly enact, by means of a suitable program, any computation exchange-free on a remote second party's unknown qubit, thus opening the possibility of directly enacting any desired algorithm remotely on a programmable quantum circuit.

## References

SHOWING 1-10 OF 66 REFERENCES

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…

Direct counterfactual communication via quantum Zeno effect

- PhysicsProceedings of the National Academy of Sciences
- 2017

By using the quantum Zeno effect and a single-photon source, direct communication without carrier particle transmission is implemented successfully and the feasibility of direct counterfactual communication is experimentally demonstrated with the current technique.

Counterfactual quantum computation through quantum interrogation

- Computer ScienceNature
- 2006

This work shows how to boost the counterfactual inference probability to unity, thereby beating the random guessing limit and implementing Grover's search algorithm with an all-optical approach, and can eliminate errors induced by decoherence.

Deterministic Teleportation and Universal Computation Without Particle Exchange

- Physics
- 2020

The controlled-phase universal gate is proposed, where no particles are exchanged between control and target, allows complete Bell detection among two remote parties, and is experimentally feasible.

What Is Nonlocal in Counterfactual Quantum Communication?

- PhysicsPhysical review letters
- 2020

It is shown that a locally conserved, massless current-specifically, a current of modular angular momentum, L_{z} mod 2ℏ-carries the one bit of information.

Counterfactual entanglement distribution without transmitting any particles.

- PhysicsOptics express
- 2014

A counterfactual protocol for entanglement distribution against the traditional forms, that is, two distant particles can be entangled with no physical particles travel between the two remote participants, is proposed.

Do the laws of physics prohibit counterfactual communication?

- PhysicsArXiv
- 2018

This paper proposes exactly such a counterfactual scheme where, unambiguously, none of Alice's photons that make it has been to Bob, and demonstrates counterfactuality experimentally by means of weak measurements, as well as conceptually using consistent histories.

Comment on "Particle Path Through a Nested Mach-Zehnder Interferometer"

- Physics
- 2018

In a recent paper, arXiv:1604.04596, Griffiths questioned - based on an informative consistent-histories (CH) argument - the counterfactuality, for one of the bit choices, of Salih et al.'s protocol…

A quantum gate between a flying optical photon and a single trapped atom

- PhysicsNature
- 2014

The development of a robust two-qubit gate that allows the linking of distant computational nodes is “a pressing challenge” and here it is demonstrated between the spin state of a single trapped atom and the polarization state of an optical photon contained in a faint laser pulse.

Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels.

- PhysicsPhysical review letters
- 1993

An unknown quantum state \ensuremath{\Vert}\ensuremath{\varphi}〉 can be disassembled into, then later reconstructed from, purely classical information and purely nonclassical Einstein-Podolsky-Rosen…