qubit

Such a system might be extended in multiple relays, so that the qubits in a key could be transmitted across continents or oceans.

They do so by encoding all possible permutations in the form of a small number of "qubits" .

Many thousands of qubits would be necessary to make quantum computing useful.

The researchers controlled the system using a microwave 'tone' with a frequency that causes the qubits to become entangled.

An eavesdropper might sabotage a receiver's detector, causing qubits received from a sender to leak back into a fiber and be intercepted.

A software algorithm, known as privacy amplification, helps to guard against this possibility by masking the values of the qubits.

Researchers have produced entangled states of up to eight qubits and have shown that these rudimentary computers can run simple algorithms.

DiCarlo was able to keep the qubits entangled for a microsecond, which is the state of the art, he says.

The freedom that qubits have to roam across the entire sphere helps to give quantum computers their unique capabilities.

It appears straightforward (though technically very challenging) to scale up the trapped-ion approach to much larger numbers of qubits.

And laser beams thinner than a human hair can be targeted on individual atoms to manipulate and measure the data stored in the qubits.

The third basic requirement is the ability to devise at least one type of logic gate between qubits.

It finds that the entanglement between two qubits and the critical temperature will be enhanced in an opposite magnetic field.

The two qubits are separated by a cavity that contains microwaves, and the whole system connected to an electric current.

As a simple example, we study the partial entropy of entanglement of three qubits system.

When qubits in such a "superposition" state work together, they can operate on exponentially more data than the same number of regular bits.

In a topological quantum computer, the qubits may be represented by groups of anyons.

Additional qubits can be added by a process called entanglement.

Currently, quantum information is transmitted by connecting, or entangling, qubits.

if qubits are not carefully isolated from their surroundings , such disturbances will introduce errors into the computation.

And instead of giving coats, two qubits (you and Alice) are actually giving heat to the third qubit (Sam).

Instead of coupling the ions through their oscillatory motions , these researchers are using photons to link the qubits.

That means huge calculations can be done using a manageable number of qubits.

Longer entanglement allows the qubits to process more complex problems.

Components such as the atom conveyor could be used to bring qubits together to interact in a controllable fashion.

A quantum computer would use entangled qubits to process information.

There are several candidate technologies for storing, manipulating and moving qubits.

DiCarlo made his device out of two transmon qubits.

By a process known as entanglement, two qubits can encode four different values simultaneously (00, 01, 10 and 11).

An optical amplifier would corrupt qubits.

The qubits are typically expressed as certain quantum properties of trapped particles, such as individual atomic ions or electrons.

We can solve this problem, however, by using laser beams that are focused on the particular qubit (or qubits) of interest.

A voltage pulse is then applied to control how long the two qubits remain entangled and in their superpositional state.

Qubits are able to exist as both 0 and 1 at once.

In Chapter Four, we discuss how to realize spin qubits in graphene via quantum dots.

Qubits can be made in a variety of ways, such as suspending ions or atoms in magnetic fields.

He is working to give the processor more qubits, and so more processing power.

With qubits, they are elegantly performed all at the same time.

Four qubits can represent 16 values, and so on.

Geometric quantum information processing with superconducting qubits inside a cavity

The entanglement between the boundary qubits in the five-qubit Heisenberg XX open chain

Study on energy levels of two coupled Josephson junction flux qubits

Geometric Phase for the Qubits with Anisotropic Coupling

Endo-Fullerene and Doped Diamond Nanocrystallite-Based Models of Qubits for Solid-State Quantum Computers

Versatility in quantum error correcting code of encoding one qubit in five qubits

In general, a quantum computer with N qubits can simultaneously manipulate 2N numbers;

Quantum Fourier Circuit Optimization Based on Use of Relaxing Qubits