Simple scheme for generating an<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>n</mml:mi></mml:math>-qubit<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>W</mml:mi></mml:math>state in cavity QED

Deng, Zhi Jiao; Feng, Mang; Gao, Kelin

doi:10.1103/physreva.73.014302

Cited by 84 publications

(34 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For three frequency-degenerate oscillators with equal coupling strength γ to the qubit, instead of the symmetric Bell state after the LZ sweep of the qubit, one would obtain the so-called W state [49,50] |W = (|001 + |010 + |100 ) / √ 3, (36) while for N oscillators the N -qubit W state would be produced [20,51,52]. Needless to say that it is technologically very challenging to fabricate such systems, but the creation of these maximally entangled states simply by a single LZ sweep in a qubit would be fascinating.…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, we did not assume whether or not the LZ transitions would occur independently. In other words, the exact probability (20) comes out independent of these two assumptions. Now that the assumptions hold, the exact result will still hold.…”

Section: A Large Detuning (δω ≫ γ/ )mentioning

confidence: 99%

“…From the final three-level state (24) we find back the exact survival probability |c ↑ (∞)| 2 = q ′ = exp(−2πη). In the derivation of the exact result (20) we took the full Hilbert space into account rather than a three-level subspace. Moreover, we did not assume whether or not the LZ transitions would occur independently.…”

Section: A Large Detuning (δω ≫ γ/ )mentioning

confidence: 99%

“…The first option is encountered in most proposals, where the quantum harmonic oscillator is to be used as a bus to manipulate and read out the qubits [17,18,19,20]. The second option is the circuit analogue of two-cavity (or N -cavity) QED [9,10], and the present paper belongs to this category.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Entanglement creation in circuit QED via Landau–Zener sweeps

Wubs

Kohler

Hänggi

2007

Physica E: Low-dimensional Systems and Nanostructures

View full text Add to dashboard Cite

A qubit may undergo Landau-Zener transitions due to its coupling to one or several quantum harmonic oscillators. We show that for a qubit coupled to one oscillator, Landau-Zener transitions can be used for single-photon generation and for the controllable creation of qubit-oscillator entanglement, with state-of-the-art circuit QED as a promising realization. Moreover, for a qubit coupled to two cavities, we show that Landau-Zener sweeps of the qubit are well suited for the robust creation of entangled cavity states, in particular symmetric Bell states, with the qubit acting as the entanglement mediator. At the heart of our proposals lies the calculation of the exact Landau-Zener transition probability for the qubit, by summing all orders of the corresponding series in time-dependent perturbation theory. This transition probability emerges to be independent of the oscillator frequencies, both inside and outside the regime where a rotating-wave approximation is valid.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: A Large Detuning (δω ≫ γ/ )mentioning

confidence: 99%

Section: A Large Detuning (δω ≫ γ/ )mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Entanglement creation in circuit QED via Landau–Zener sweeps

Wubs

Kohler

Hänggi

2007

Physica E: Low-dimensional Systems and Nanostructures

View full text Add to dashboard Cite

show abstract

“…As long as there is no photon decay from the cavity, the evolution of the system is governed by the non-hermitian Hamiltonian [3] …”

Section: Entanglement With Decaymentioning

confidence: 99%

Influence of Cavity Decay on Phase Distribution and Rabi Flopping in Cavity QED

Ghosh

Das

2007

Int J Theor Phys

View full text Add to dashboard Cite

The quantum mechanical phase distribution and the quantum oscillations of population are studied for a cavity field togetherwith a driven classical field. The atom is sent through the cavity and driven by a classical field. Also the time evolution of the system including decay is obtained. The graph showing the Rabi oscillations for this system is changed into a bit pattern from the system without decay. The phase probability function is also affected due to the presence of cavity decay.

show abstract

A Proposal of Telecloning for a Three-Particle Entangled W State

2009

View full text Add to dashboard Cite

A 1 → 2 telecloning solution for an arbitrary three-particle entangled W state is proposed in which two four-particle entangled states are used as quantum channels. It is proposed that the three-particle W state can be telecloned based on the quantum teleportation and the local copying of entanglement, and the fidelity of each clone depends on the input state. This scheme can be generalized into the case of 1 → N (N > 2) telecloning of an arbitrary three-particle W state. Furthermore, another scheme for 1 → N (N ≥ 2) telecloning of an arbitrary n-particle (n ≥ 4) W state is proposed, the multi-bit controlled-NOT (CNOT) gates and additional particles are needed in this case.

show abstract

Simple scheme for generating ann-qubitWstate in cavity QED

Cited by 84 publications

References 23 publications

Entanglement creation in circuit QED via Landau–Zener sweeps

Entanglement creation in circuit QED via Landau–Zener sweeps

Influence of Cavity Decay on Phase Distribution and Rabi Flopping in Cavity QED

A Proposal of Telecloning for a Three-Particle Entangled W State

Contact Info

Product

Resources

About