Patent
Quantum computing method and quantum computer
Hayato Goto,Kouichi Ichimura +1 more
- 23 Sep 2008
80
TL;DR: In this paper, an N+1 number of physical systems each having five energy levels |0>, |1>, |2>, |3>, |4>, and |4> are provided in an optical cavity having a cavity mode resonant with |2>-|3>, such that an N number of control systems and a target system are prepared.
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Abstract: An (N+1) number of physical systems each having five energy levels |0>, |1>, |2>, |3>, and |4>, a qubit being expressed by |0> and |1>, are provided in an optical cavity having a cavity mode resonant with |2>-|3>, such that an N number of control systems and a target system are prepared. The target system is irradiated with light pulses resonant with |0>-|4>, |1>-|4>, and |2>-|4> to change a superposed state |c> to |2>. All of the physical systems are irradiated with light pulses resonant with |0>-|3> and |1>-|3>, and a phase of the light pulse resonant with the target system is shifted by a specific value dependent on a unitary transformation U. The target system is irradiated with light pulses resonant with |0>-|4>, |1>-|4>, and |2>-|4>, with a phase difference between them being set to a specific value dependent on the unitary transformation U, to return |2> to |c>.
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Citations
Magic state distillation with low space overhead and optimal asymptotic input count
Jeongwan Haah,Matthew B. Hastings,David Poulin,Dave Wecker +3 more
- 03 Oct 2017
TL;DR: An infinite family of protocols to distill magic states for T -gates that has a low space overhead and uses an asymptotic number of input magic states to achieve a given target error that is conjectured to be optimal is presented.
Patent
Arbitrary quantum operations with a common coupled resonator
James E. Baumgardner,Aaron A. Pesetski +1 more
- 01 Aug 2008
TL;DR: In this article, a quantum logic gate is formed from multiple qubits coupled to a common resonator, wherein quantum states in the qubits are transferred to the resonator by transitioning a classical control parameter between control points at a selected one of slow and fast transition speeds, relative to the characteristic energy of the coupling.
70
Patent
Method and apparatus for controlling qubits with single flux quantum logic
John X. Przybysz,James E. Baumgardner,Aaron A. Pesetski,Donald L. Miller,Quentin P. Herr +4 more
- 07 Feb 2011
TL;DR: In this paper, the authors describe a method and apparatus for controlling the energy state of a qubit by bringing the qubit into and out of resonance by coupling the qubits to a flux quantum logic gate.
70
Patent
Single flux quantum circuits
Quentin P. Herr
- 13 Dec 2007
TL;DR: In this paper, a superconducting single flux quantum circuits are described, each having at least one Josephson junction which will flip when the current through it exceeds a critical current.
65
Codes and protocols for distilling T, controlled-S, and toffoli gates
Jeongwan Haah,Matthew B. Hastings +1 more
- 07 Jun 2018
TL;DR: In this paper, a magic state distillation protocol is generated for creating magic states in a quantum computing device, where the magic state can then be configured to implement the protocol in order to create magic states.
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